Solved papers for RAJASTHAN PMT Rajasthan - PMT Solved Paper-2010

done Rajasthan - PMT Solved Paper-2010 Total Questions - 300

• question_answer1) A block of metal weighing 2 kg is resting on a frictionless plane. It is strucked by a jet releasing. Water at a rate of 1 kg/s and at a speed of 5 m/s. The initial acceleration of the block will be
  A)
   \[2.5\,m/{{s}^{2}}\]      
  done clear
  B)
   \[5.0\,m/{{s}^{2}}\]
  done clear
  C)
   \[10\,m/{{s}^{2}}\]        
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer2) A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 s is V = 4.2 J/cal and \[g=9.8\,m/{{s}^{2}}\])
  A)
   9.33 cal               
  done clear
  B)
          10.21 cal
  done clear
  C)
   12.67 cal             
  done clear
  D)
          13.34 cal
  done clear
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• question_answer3) From an automatic gun a man fires 360 bullet per minute with a speed of 360 km/h. If each weighs 20g, the power of the gun is
  A)
   600 W                                  
  done clear
  B)
   300 W
  done clear
  C)
   150 W                  
  done clear
  D)
          75 W
  done clear
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• question_answer4) An annular ring with inner and outer radii \[{{R}_{1}}\] and \[{{R}_{2}}\]is rolling without slippling with a uniform angular speed. The ratio of the forces experienced by the two particles situated on the inner and outer parts of the ring, \[\frac{{{F}_{1}}}{{{F}_{2}}}\]is
  A)
   1            
  done clear
  B)
                          \[\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)\]
  done clear
  C)
   \[\frac{{{R}_{2}}}{{{R}_{1}}}\]                   
  done clear
  D)
          \[{{\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)}^{2}}\]
  done clear
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• question_answer5)            A rubber cord catapult has cross-sectional area \[25\,m{{m}^{2}}\] and initial length of rubber cord is 10 cm. It is stretched to 5 cm and then released to project a missile of mass 5 g. Taking \[{{Y}_{rubber}}\,=5\times {{10}^{8}}\,N/{{m}^{2}}\]. Velocity of projected missile is
  A)
   \[20\,m/{{s}^{-1}}\]
  done clear
  B)
   \[100\,m/{{s}^{-1}}\]
  done clear
  C)
   \[250\,m/{{s}^{-1}}\]                    
  done clear
  D)
          \[200\,m/{{s}^{-1}}\]
  done clear
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• question_answer6) If the work done in blowing a bubble of volume V is W then the work done in blowing bubble of volume 2 V from the same soap solution will be
  A)
   W/2                                     
  done clear
  B)
   \[\sqrt{\text{2}}\,\text{W}\]
  done clear
  C)
   \[\sqrt[\text{3}]{\text{2}}\,\text{W}\]                 
  done clear
  D)
          \[\sqrt[\text{3}]{\text{4}}\,\text{W}\]
  done clear
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• question_answer7) 540 g of ice of \[0{}^\circ C\] is mixed with 540 g of water at \[80{}^\circ C\]. The final temperature of the mixture is
  A)
  \[0{}^\circ C\]                                   
  done clear
  B)
  \[40{}^\circ C\]
  done clear
  C)
  \[80{}^\circ C\]                 
  done clear
  D)
          less than \[0{}^\circ C\]
  done clear
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• question_answer8) The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel?
  A)
  \[75{}^\circ C\]                                 
  done clear
  B)
  \[67{}^\circ C\]
  done clear
  C)
   \[33{}^\circ C\]                
  done clear
  D)
          \[25{}^\circ C\]
  done clear
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• question_answer9) In order to double the frequency of the fundamental note emitted by a stretched string, the length is reduced to\[\frac{\text{3}}{\text{4}}\text{th}\] of the original length and the tension is changed. The factor by which the tension is to be changed is
  A)
   \[\frac{\text{3}}{8}\]                                    
  done clear
  B)
   \[\frac{2}{3}\]
  done clear
  C)
   \[\frac{8}{9}\]                  
  done clear
  D)
          \[\frac{9}{4}\]
  done clear
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• question_answer10) A \[\text{10}\,\text{F}\] capacitor is charged to a potential difference of 1000 V. The terminals of the charged capacitor are disconnected from the power supply and connected to the terminals of an uncharged 6uF capacitor. What is the final potential difference across each capacitor?
  A)
   167 V                                   
  done clear
  B)
   100 V
  done clear
  C)
   625 V                   
  done clear
  D)
          250 V
  done clear
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• question_answer11) In the circuit shown in figure, switch S; is initially closed and \[{{S}_{2}}\] is open. Find \[{{V}_{a}}-{{V}_{b.}}\].
  A)
   4 V                                        
  done clear
  B)
   8 V
  done clear
  C)
   12 V                     
  done clear
  D)
          16 V
  done clear
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• question_answer12) Two bulbs consume same power when operated at 200V and 300V respectively. When these bulbs are connected in series across a DC source of 500 V, then
  A)
   ratio of potential differences across them is 3/2
  done clear
  B)
   ratio of potential differences across them is 9/4
  done clear
  C)
   ratio of powers consumed across them is 4/9
  done clear
  D)
   ratio of powers consumed across them is 2/3
  done clear
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• question_answer13) Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earths magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is
  A)
   3 : 1                                      
  done clear
  B)
   1 : 3
  done clear
  C)
   3 : 5                      
  done clear
  D)
          5 : 4
  done clear
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• question_answer14) The molar heat capacity in a process of a diatomic gas if it does a work of \[\frac{Q}{4},\]when a heat of Q is supplied to it is
  A)
   \[\frac{2}{5}R\]                                               
  done clear
  B)
   \[\frac{5}{2}R\]
  done clear
  C)
   \[\frac{10}{3}R\]                             
  done clear
  D)
          \[\frac{6}{7}R\]
  done clear
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• question_answer15) The dimensions of \[\frac{a}{b}\]in the equation\[P=\frac{a-{{t}^{2}}}{bx},\] where p is pressure, x is distance and t is time, are
  A)
   \[[M{{T}^{-2}}]\]            
  done clear
  B)
   \[[{{M}^{2}}{{T}^{-3}}]\]
  done clear
  C)
   \[[M{{L}^{3}}{{T}^{-1}}]\]           
  done clear
  D)
          \[[L{{T}^{-3}}]\]
  done clear
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• question_answer16) Dimensions of \[\frac{1}{{{\mu }_{0}}{{\varepsilon }_{0}}},\]where symbols have their usual meanings are
  A)
   \[[L{{T}^{-1}}]\]                              
  done clear
  B)
   \[[{{L}^{-1}}T]\]
  done clear
  C)
   \[[{{L}^{-}}^{2}{{T}^{2}}]\]                         
  done clear
  D)
          \[[{{L}^{2}}{{T}^{-2}}]\]
  done clear
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• question_answer17) A body is projected vertically up with a velocity v and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are
  A)
   \[\frac{{\mathbf{\vec{v}}}}{2}and\frac{v}{2}\]                                 
  done clear
  B)
   \[0\,and\frac{v}{2}\]
  done clear
  C)
   0 and 0                
  done clear
  D)
          \[\frac{{\mathbf{\vec{v}}}}{2}and\,0\]
  done clear
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• question_answer18) A sphere of mass m is tied to end of a string of length\[l\]and rotated through the other end along a horizontal circular path with speed v. The work done in full horizontal circle is
  A)
   zero                                     
  done clear
  B)
   \[\left( \frac{m{{v}^{2}}}{l} \right)2\pi l\]
  done clear
  C)
   \[mg.\,2\pi l\]                  
  done clear
  D)
          \[\left( \frac{m{{v}^{2}}}{l} \right)(l)\]
  done clear
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• question_answer19) For a body moving in a circular path, a condition for no skidding if\[\mu \] is the coefficient of friction, is
  A)
   \[\frac{m{{v}^{2}}}{r}\le \mu mg\]                         
  done clear
  B)
   \[\frac{m{{v}^{2}}}{r}\ge \mu mg\]
  done clear
  C)
   \[\frac{v}{r}=\mu g\]    
  done clear
  D)
          \[\frac{m{{v}^{2}}}{r}=\mu mg\]
  done clear
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• question_answer20) A car is moving with a uniform speed on a level road. Inside the car there is a balloon filled with helium and attached to a piece of string tied to the floor. The string is observed to be vertical. The car now takes a left turn maintaining the speed on the level road. The balloon in the car will
  A)
   continue to remain vertical
  done clear
  B)
   burst while taking the curve
  done clear
  C)
   be thrown to the right side
  done clear
  D)
   be thrown to the left side
  done clear
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• question_answer21) Two balls of masses \[{{m}_{1}}\] and\[{{m}_{2}}\] are separated from each other by a powder charge placed between them. The whole system is at rest on the ground. Suddenly the powder charge explodes and masses are pushed apart. The mass\[{{m}_{1}}\]travels a distance \[{{S}_{1}}\] and stops. If the coefficients of friction between the balls and ground are same, the mass \[{{m}_{2}}\]stops after travelling the distance
  A)
   \[{{s}_{2}}=\frac{{{m}_{1}}}{{{m}_{2}}}{{s}_{1}}\]                            
  done clear
  B)
   \[{{s}_{2}}=\frac{{{m}_{2}}}{{{m}_{1}}}{{s}_{1}}\]
  done clear
  C)
   \[{{s}_{2}}=\frac{{{m}_{1}}}{m_{2}^{2}}{{s}_{1}}\]          
  done clear
  D)
          \[{{s}_{2}}=\frac{m_{2}^{1}}{m_{1}^{2}}{{s}_{1}}\]
  done clear
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• question_answer22) A cricket ball of mass 250 g collides with a bat with velocity 10 m/s and returns with the same velocity within 0.01 s. The force acted on bat is
  A)
   25 N                                     
  done clear
  B)
   50 N
  done clear
  C)
   250 N                   
  done clear
  D)
          500 N
  done clear
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• question_answer23) When a spring is stretched by 2 cm, it stores 100 J of energy. If it is stretched further by 2 cm, the stored energy will be increased by
  A)
   100 J                                    
  done clear
  B)
   200 J
  done clear
  C)
   300 J                    
  done clear
  D)
          400 J
  done clear
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• question_answer24) The kinetic energy of a body decreases by 36%. The decrease in the momentum is
  A)
   36%                                      
  done clear
  B)
   20%
  done clear
  C)
   8%                        
  done clear
  D)
          6%
  done clear
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• question_answer25) A wheel has a speed of 1200 revolutions per minute and is made to slow down at a rate of 4 radians/s2.The number of revolutions it makes before coming to rest is
  A)
   143                                       
  done clear
  B)
   272
  done clear
  C)
   314                       
  done clear
  D)
          722
  done clear
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• question_answer26) When a uniform solid sphere and a disc of the same mass and of the same radius rolls down an inclined smooth plane from rest to the same distance, then the ratio of the time taken by them is
  A)
   15 : 14                                 
  done clear
  B)
   \[{{15}^{2}}:{{14}^{2}}\]
  done clear
  C)
   \[\sqrt{14}:\sqrt{15}\]                 
  done clear
  D)
          14 : 15
  done clear
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• question_answer27) The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : 2. The acceleration due to gravity on the planets will be in ratio
  A)
   1 : 2                                      
  done clear
  B)
   2 : 3
  done clear
  C)
   2 : 1                      
  done clear
  D)
          4 : 1
  done clear
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• question_answer28) At the surface of a certain planet, acceleration due to gravity is one-quarter of that on earth. If a brass ball is transported to this planet, then which one of the following statements is not correct?
  A)
   The mass of the brass ball on this planet is a quarter of its mass as measured on earth
  done clear
  B)
   The weight of the brass ball on this planet is a quarter of the weight as measured on earth
  done clear
  C)
   The brass ball has the same mass on the planet as on earth
  done clear
  D)
   The brass ball has the same volume on the other planet as on earth
  done clear
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• question_answer29) A clock S is based on oscillation of a spring and a clock P based on pendulum motion. Both clocks run at the same rate on earth. On a planet having the same density as earth but twice the radius
  A)
   S will run faster than P
  done clear
  B)
   P will run faster than S
  done clear
  C)
   they will both run at the same rate as on the earth
  done clear
  D)
   None of the above
  done clear
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• question_answer30) At a given place where acceleration due to gravity is \[g\,m/{{s}^{2}},\] a sphere of lead of density \[d\,kg/{{m}^{3}}\] is getting released in a column of liquid of density\[\text{ }\!\!\!\!\text{ }\text{ }\!\!\!\!\text{ }\] \[kg\,/{{m}^{3}}\]. If \[d>\rho ,\] the sphere will
  A)
   fall vertically with an acceleration \[g\,m/{{s}^{2}}\]
  done clear
  B)
   fall vertically with no acceleration
  done clear
  C)
   fall vertically with an acceleration\[\left( \frac{d-\rho }{d} \right)\]
  done clear
  D)
   fall vertically with an acceleration\[\left( \frac{\rho }{d} \right)\]
  done clear
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• question_answer31) The diameter of a brass rod is 4 mm and Youngs modulus of brass is \[9\times {{10}^{10}}\,N/{{m}^{2}}\]. The force required to stretch by 0.1% of its length is
  A)
   \[360\,\pi N\]                                  
  done clear
  B)
   36 N
  done clear
  C)
   \[144\pi \times {{10}^{3}}N\]     
  done clear
  D)
          \[36\pi \times {{10}^{5}}N\]
  done clear
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• question_answer32) A ball falling in a lake of depth 200m shows 0.1% decrease in its volume at the bottom. What is the bulk modulus of the material of the ball
  A)
   \[19.6\,\times {{10}^{8}}\,N/{{m}^{2}}\]             
  done clear
  B)
   \[19.6\,\times {{10}^{-10}}\,N/{{m}^{2}}\]
  done clear
  C)
   \[19.6\,\times {{10}^{10}}N/{{m}^{2}}\]              
  done clear
  D)
   \[19.6\,\times {{10}^{-8}}\,N/{{m}^{2}}\]
  done clear
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• question_answer33) If one end of a wire is fixed with a rigid support and the other end is stretched by a force of 10 N, then the increase in length is 0.5 mm. The ratio of the energy of the wire and the work done in displacing it through 1.5 mm by the weight is
  A)
   \[\frac{1}{3}\]                                  
  done clear
  B)
   \[\frac{1}{4}\]
  done clear
  C)
   \[\frac{1}{2}\]                  
  done clear
  D)
          1
  done clear
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• question_answer34) The increase in length on stretching a wire is 0.05%. If its Poissons ratio is 0.4, then its diameter will be  
  A)
   reduced by 0.02%          
  done clear
  B)
   reduced by 0.1%
  done clear
  C)
   increased by 0.02%       
  done clear
  D)
   decreased by 0.4%
  done clear
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• question_answer35) Work done in splitting a drop of water of 1 mm radius into 10 droplets is (surface tension of water \[=72\,\times {{10}^{-3}}J/{{m}^{2}}\])
  A)
   \[9.58\,\times {{10}^{-5}}J\]                      
  done clear
  B)
   \[8.95\,\times {{10}^{-5}}J\]
  done clear
  C)
   \[5.89\,\times {{10}^{-5}}J\]      
  done clear
  D)
          \[5.98\,\times {{10}^{-6}}J\]
  done clear
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• question_answer36) Water rises to a height of 16.3 cm in a capillary tube of height 18 cm above the water level. If the tube is cut at a height of 12 cm, then
  A)
   water will come as a fountain from the capillary tube
  done clear
  B)
   water will stay at a height of 12 cm in the capillary tube
  done clear
  C)
   the height of the water in the capillary tube will be 10.3 cm
  done clear
  D)
   water will flow down the sides of the capillary tube
  done clear
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• question_answer37) Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is \[9\,g/c{{m}^{3}}\]. If the mass of the other is 48 g, its density in \[g/c{{m}^{3}}\] is
  A)
   \[\frac{4}{3}\]                                  
  done clear
  B)
   \[\frac{3}{2}\]
  done clear
  C)
   3                            
  done clear
  D)
          5
  done clear
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• question_answer38) The fraction of a floating object of volume\[{{V}_{0}}\] and density\[{{d}_{0}}\]above the surface of liquid of density\[d\] will be
  A)
   \[\frac{{{d}_{0}}}{d}\]                                  
  done clear
  B)
   \[\frac{d{{d}_{0}}}{d+{{d}_{0}}}\]
  done clear
  C)
   \[\frac{d-{{d}_{0}}}{d}\]              
  done clear
  D)
          \[\frac{d{{d}_{0}}}{d-{{d}_{0}}}\]
  done clear
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• question_answer39)                   A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice cold water, and 67 units in a boiling liquid. The boiling point of the liquid will be
  A)
  \[135{}^\circ C\]                              
  done clear
  B)
  \[125{}^\circ C\]
  done clear
  C)
  \[112{}^\circ C\]              
  done clear
  D)
         \[100{}^\circ C\]
  done clear
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• question_answer40) A breaker is completely filled with water at \[4{}^\circ C\]. It will overflow if
  A)
   heated above \[4{}^\circ C\]
  done clear
  B)
   cooled below \[4{}^\circ C\]
  done clear
  C)
   both heated and cooled above and below \[4{}^\circ C\] respectively
  done clear
  D)
   None of the above
  done clear
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• question_answer41) The following sets of values for\[{{C}_{V}}\]and \[{{C}_{P}}\] of a gas has been reported by different students. The units are cal/g-mol-K. Which of these sets is most reliable?
  A)
   \[{{C}_{V}}=3,\,{{C}_{p}}=5\]                    
  done clear
  B)
   \[{{C}_{V}}=4,\,{{C}_{p}}=6\]
  done clear
  C)
   \[{{C}_{V}}=3,\,{{C}_{p}}=2\]   
  done clear
  D)
         \[{{C}_{V}}=3,\,{{C}_{p}}=4.2\]
  done clear
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• question_answer42) A cylinder of capacity 20 L is filled with H2 gas. The total average kinetic energy of translator motion of its molecules is \[1.5\,\times {{10}^{5}}J\]. The pressure of hydrogen in the cylinder is
  A)
   \[2\times {{10}^{6}}\,N/{{m}^{2}}\]       
  done clear
  B)
   \[3\times {{10}^{6}}\,N/{{m}^{2}}\]
  done clear
  C)
   \[4\times {{10}^{6}}\,N/{{m}^{2}}\]       
  done clear
  D)
   \[5\times {{10}^{6}}\,N/m\]
  done clear
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• question_answer43) An engineer claims to have made an engine delivering 10 kW power with fuel consumption of 1 g/s. The calorific value of the fuel is 2 kcal/g. The claim of the engineer is
  A)
   valid                                     
  done clear
  B)
   invalid
  done clear
  C)
   depends on engine design
  done clear
  D)
   depends of the load
  done clear
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• question_answer44) Find the change in the entropy in the following process 100 gm of ice at \[0{}^\circ C\] melts when dropped in a bucket of water at \[50{}^\circ C\]. (Assume temperature of water does not change)
  A)
   - 4.5 cal/K                          
  done clear
  B)
   + 4.5 cal/K
  done clear
  C)
   + 5.4 cal/K         
  done clear
  D)
          - 5.4 cal /K
  done clear
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• question_answer45) A cylinder of fixed capacity 44.8 L contains a monoatomic gas at standard temperature and pressure. The amount of heat required to raise the temperature of cylinder by \[10{}^\circ C\] will be (R = universal gas constant)
  A)
   R                                           
  done clear
  B)
   10 R
  done clear
  C)
   20 R                      
  done clear
  D)
          30 R
  done clear
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• question_answer46) Two spheres of different materials one with double the radius and one-fourth with thickness of the other, are filled with ice. If the time taken for complete melting of ice in the large radius one is 25 min and that for smaller one is 16 min, the ratio of thermal conductivities of the materials of larger sphere to the smaller sphere is
  A)
   4 : 5                                      
  done clear
  B)
   5 : 4
  done clear
  C)
   25 : 1                    
  done clear
  D)
          1 : 25
  done clear
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• question_answer47) An ideal black body at room temperature is thrown into a furnace. It is observed that
  A)
   initially, it is the darkest body and at later times the brightest
  done clear
  B)
   it is the darkest body at all times
  done clear
  C)
   it cannot be distinguished at all times
  done clear
  D)
   initially, it is the darkest body and at later times it cannot be distinguished           
  done clear
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• question_answer48) An emf of 100 mV is induced in a coil when the current in another nearby coil becomes 10 A from zero in 0.1 s. The coefficient of mutual induction between the two coils will be
  A)
   1 mH                                    
  done clear
  B)
   10 mH
  done clear
  C)
   100 mH               
  done clear
  D)
          1000 mH
  done clear
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• question_answer49) In an L-R circuit, time constant is that time in which current grows from zero to the value (where \[{{I}_{0}}\]is the steady state current)
  A)
   0.63\[{{I}_{0}}\]                              
  done clear
  B)
   0.50\[{{I}_{0}}\]
  done clear
  C)
   0.37 \[{{I}_{0}}\]             
  done clear
  D)
          \[{{I}_{0}}\]
  done clear
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• question_answer50) The horizontal component of .the earths magnetic field at a place is \[3\times {{10}^{-4}}T\] and the dip is \[{{\tan }^{-1}}\left( \frac{4}{3} \right).\] A metal rod of length 0.25 m placed in the north-south position and is moved at a constant speed of 10 cm/s towards the east. The emf induced in the rod will be
  A)
   zero                                     
  done clear
  B)
   \[1\,\mu V\]
  done clear
  C)
   \[5\,\mu V\]                    
  done clear
  D)
          \[10\,\mu V\]
  done clear
  View Answer play_arrow

• question_answer51) In \[\text{L-C-R}\] circuit, \[\text{R=100}\,\Omega \] When capacitance C is removed, the current lags behind the voltage by\[\frac{\pi }{3}.\] When inductance L is removed, the current leads the voltage by \[\frac{\pi }{3}.\]The impedance of the circuit is
  A)
   \[50\,\Omega \]                             
  done clear
  B)
   \[100\,\Omega \]
  done clear
  C)
   \[200\,\Omega \]          
  done clear
  D)
          \[400\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer52) If 10000 V is applied across an X-ray tube, what will be the ratio of de-Broglie wavelength of the incident electrons to the shortest wavelength of X-ray produced? (e/m for electron is \[1.8\,\times {{10}^{11}}Ck{{g}^{-1}}\])
  A)
   1                                            
  done clear
  B)
   0.1
  done clear
  C)
   0.2                        
  done clear
  D)
          0.3
  done clear
  View Answer play_arrow

• question_answer53) An electron is accelerated through a potential difference of 1000 V. Its velocity is nearly
  A)
   \[3.8\,\times {{10}^{7}}m/s\]    
  done clear
  B)
   \[\text{1}\text{.9 }\!\!\times\!\!\text{ 1}{{\text{0}}^{6}}\text{m/s}\]
  done clear
  C)
   \[\text{1}\text{.9 }\!\!\times\!\!\text{ 1}{{\text{0}}^{7}}\text{m/s}\]     
  done clear
  D)
          \[\text{5}\text{.7 }\!\!\times\!\!\text{ 1}{{\text{0}}^{7}}\text{m/s}\]
  done clear
  View Answer play_arrow

• question_answer54) A photon, an electron and uranium nucleus all have the same wavelength. The one with the most energy
  A)
   is the photon
  done clear
  B)
   is the electron
  done clear
  C)
   is the uranium nucleus
  done clear
  D)
   depends upon the wavelength and the properties of the particle
  done clear
  View Answer play_arrow

• question_answer55) Which of the following statements is not correct?
  A)
   Photographic plates are sensitive to infrared rays
  done clear
  B)
   Photographic plates are sensitive to ultraviolet rays
  done clear
  C)
   Infra red rays are invisible but can cast shadows like visible light
  done clear
  D)
   Infrared photons have more energy than photons of visible light
  done clear
  View Answer play_arrow

• question_answer56) Assuming photoemission to take place, the factor by which the maximum velocity of the emitted photoelectrons changes when the wavelength of the incident radiation is increased four times, is
  A)
   4                                            
  done clear
  B)
   \[\frac{1}{4}\]
  done clear
  C)
   2                            
  done clear
  D)
          \[\frac{1}{2}\]
  done clear
  View Answer play_arrow

• question_answer57) 57.      A nucleus\[z{{X}^{A}}\] emits 9 \[\alpha -\]-particles and 5 \[\beta \]-particles. The ratio of total protons and neutrons in the final nucleus is
  A)
   \[\frac{Z-13}{(A-Z-23)}\]                             
  done clear
  B)
   \[\frac{Z-18}{(A-36)}\]
  done clear
  C)
   \[\frac{Z-13}{(A-36)}\] 
  done clear
  D)
          \[\frac{Z-13}{(A-Z-13)}\]
  done clear
  View Answer play_arrow

• question_answer58)   If\[{{t}_{1/2}}\]is the half-life of a substance then\[{{t}_{3/4}}\]is the time in which substance
  A)
   decays\[\frac{\text{3}}{\text{4}}\text{th}\]      
  done clear
  B)
   remains\[\frac{\text{3}}{\text{4}}\text{th}\]
  done clear
  C)
   decays\[\frac{1}{2}\text{th}\]        
  done clear
  D)
          remains\[\frac{1}{2}\text{th}\]
  done clear
  View Answer play_arrow

• question_answer59) An AC source of angular frequency \[\omega \] is fed across a resistor rand a capacitor C in series. The current registered is \[i.\] If now the frequency of source is changed to\[\omega /3\] (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency\[\omega \].
  A)
   \[\sqrt{\frac{3}{5}}\]    
  done clear
  B)
                          \[\sqrt{\frac{2}{5}}\]
  done clear
  C)
   \[\sqrt{\frac{1}{5}}\]                    
  done clear
  D)
          \[\sqrt{\frac{4}{5}}\]
  done clear
  View Answer play_arrow

• question_answer60) Susceptibility of Mg at 300 K is \[1.2\,\times {{10}^{-5}}\]. The temperature at which susceptibility will be \[1.8\,\times {{10}^{-5}}\] is
  A)
   450 K                                   
  done clear
  B)
   200 K
  done clear
  C)
   375 K                   
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer61) In transistor, forward bias is always smaller than the reverse bias. The correct reason is
  A)
   to avoid excessive heating of transistor
  done clear
  B)
   to maintain a constant base current
  done clear
  C)
   to produce large voltage gain
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer62) In the Boolean algebra \[\overline{(\overline{A.}\overline{B}).}\] A equals to
  A)
   \[\overline{A+B}\]                                        
  done clear
  B)
   A
  done clear
  C)
   A.B                       
  done clear
  D)
          A + B
  done clear
  View Answer play_arrow

• question_answer63) The maximum peak to peak voltage of an AM wire is 24 mV and the minimum peak to peak voltage is 8 mV. The modulation factor is
  A)
   10%                                      
  done clear
  B)
   20%
  done clear
  C)
   25%                      
  done clear
  D)
          50%
  done clear
  View Answer play_arrow

• question_answer64) The focal length of objective lens and eyelens of a microscope are 4 cm and 8 cm respectively. If the least distance of distinct vision is 24 cm and object distance is 4.5 cm from the objective lens, then the magnifying power of the microscope will be
  A)
   18                                         
  done clear
  B)
   32
  done clear
  C)
   64                         
  done clear
  D)
          20
  done clear
  View Answer play_arrow

• question_answer65) When the length of a microscope tube increases, its magnifying power
  A)
   decreases
  done clear
  B)
   increases
  done clear
  C)
   does not change
  done clear
  D)
   may decrease or increase
  done clear
  View Answer play_arrow

• question_answer66) On a rainy day, a small oil film on water show brilliant colours. This is due to
  A)
   dispersion of light          
  done clear
  B)
   interference of light
  done clear
  C)
   absorption of light
  done clear
  D)
   scattering of light
  done clear
  View Answer play_arrow

• question_answer67) Two waves having intensities in the ratio 25 : 4 produce interference. The ratio of the  maximum to the minimum intensities is
  A)
   5 : 2                      
  done clear
  B)
          7 : 3
  done clear
  C)
   49 : 9                    
  done clear
  D)
          9 : 49
  done clear
  View Answer play_arrow

• question_answer68) A Carnot engine whose low temperature reservoir is at \[7{}^\circ C\] has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how many degrees should the temperature of the high temperature reservoir be increased?
  A)
   840 K                                   
  done clear
  B)
   280 K
  done clear
  C)
   560 K                   
  done clear
  D)
          373 K
  done clear
  View Answer play_arrow

• question_answer69) Two long straight wires are set parallel to each other. Each carries a current; in the same direction and the separation between them is 2r. The intensity of the magnetic field midway between them is     
  A)
   \[\frac{{{\mu }_{0i}}}{r}\]                                           
  done clear
  B)
   \[\frac{4{{\mu }_{0i}}}{r}\]
  done clear
  C)
   zero                     
  done clear
  D)
          \[\frac{{{\mu }_{0i}}}{4r}\]
  done clear
  View Answer play_arrow

• question_answer70) In hydrogen atom, an electron is revolving in the orbit of radius \[0.53\,\overset{\text{o}}{\mathop{\text{A}}}\,\] with \[6.6\,\times {{10}^{15}}\] rotation/s. Magnetic field produced at the centre of the orbit is
  A)
   \[0.125\,Wb/{{m}^{2}}\]    
  done clear
  B)
          \[1.25\,Wb/{{m}^{2}}\]
  done clear
  C)
   \[12.5\,Wb/{{m}^{2}}\]               
  done clear
  D)
          \[125\,\,Wb/{{m}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer71) An electric bulb illuminates a plane surface. The intensity of illumination on the surface at the point 2m away from the bulb is \[5\times {{10}^{-4}}\] phot (lumen/\[c{{m}^{2}}\]). The line joining the bulb to the paint makes an angle of \[60{}^\circ \] with the normal to the surface. The intensity of the bulb in candela is
  A)
   \[40\sqrt{3}\]                  
  done clear
  B)
          40
  done clear
  C)
   20                         
  done clear
  D)
          \[40\times {{10}^{-7}}\]
  done clear
  View Answer play_arrow

• question_answer72) Two batteries of emfs 4 V and 8 V with internal resistances \[1\,\Omega \] and\[2\,\Omega \] are connected in a circuit with a resistance of \[9\,\Omega \]as shown in figure. The current and potential difference between the points P and Q are
  A)
   \[\frac{\text{1}}{\text{2}}\text{A}\,\text{and}\,\text{3}\,\text{V}\]     
  done clear
  B)
          \[\frac{\text{1}}{6}\text{A}\,\text{and}\,4\,\text{V}\]
  done clear
  C)
   \[\frac{\text{1}}{9}\text{A}\,\text{and}\,9\,\text{V}\]     
  done clear
  D)
          \[\frac{\text{1}}{2}\text{A}\,\text{and}\,12\,\text{V}\]
  done clear
  View Answer play_arrow

• question_answer73) The energy required to accelerate a car from 10 m/s to 20 m/s is how many times the energy required to accelerate the car from rest to 10 m/s?
  A)
   Equal                                   
  done clear
  B)
   4 times
  done clear
  C)
   2 times               
  done clear
  D)
          3 times
  done clear
  View Answer play_arrow

• question_answer74) A cell of internal resistance\[1.5\Omega \] and ofemfl.5V balances 500 cm on a potentiometer wire. If a wire of\[15\Omega \] is connected between the balance point and the cell, then the balance point will shift
  A)
   to zero                                
  done clear
  B)
   by 500 cm
  done clear
  C)
   by 750 cm          
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer75) The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is
  A)
   \[21\times {{10}^{3}}\pm \,10%\]
  done clear
  B)
   \[23\times {{10}^{1}}\pm \,10%\]
  done clear
  C)
   \[21\times {{10}^{3}}\pm \,10%\]           
  done clear
  D)
   \[12\times {{10}^{3}}\pm \,5%\]
  done clear
  View Answer play_arrow

• question_answer76) A moving coil galvanometer has a resistance of \[50\Omega \] and gives full scale deflection for 10 mA. How could it be converted into an ammeter with a full scale deflection for 1 A?
  A)
   \[50/99\,\Omega \] in series     
  done clear
  B)
   \[50/99\,\Omega \] in parallel
  done clear
  C)
   \[0.01\,\Omega \] in series
  done clear
  D)
   \[0.01\,\Omega \] in parallel
  done clear
  View Answer play_arrow

• question_answer77) The moment of inertia of a body about a given axis is \[2.4\,\,kg-{{m}^{2}}\]. To produce a rotational kinetic energy of 750 J, an angular acceleration of \[5\,rad/{{s}^{2}}\] must be applied about that axis for
  A)
   6 s                                         
  done clear
  B)
   5 s
  done clear
  C)
   4 s                         
  done clear
  D)
          3 s
  done clear
  View Answer play_arrow

• question_answer78) A conducting sphere of radius R, and carrying a charge q is joined to a conducting sphere of radius 2R, and carrying a charge - 2q. The charge flowing between them will be
  A)
   \[-\frac{q}{3}\]                                
  done clear
  B)
   \[\frac{2q}{3}\]
  done clear
  C)
   \[q\]                    
  done clear
  D)
          \[\frac{4q}{3}\]
  done clear
  View Answer play_arrow

• question_answer79) The potential at a point due to an electron dipole will be maximum and minimum when the angles between the axis of the dipole and the line joining the point to the dipole are respectively
  A)
  \[90{}^\circ \text{ }and\text{ }180{}^\circ \]        
  done clear
  B)
  \[0{}^\circ \text{ }and\text{ }90{}^\circ \]
  done clear
  C)
  \[90{}^\circ \text{ }and\text{ }0{}^\circ \]
  done clear
  D)
         \[0{}^\circ \text{ }and\text{ }180{}^\circ \]
  done clear
  View Answer play_arrow

• question_answer80) On all the six surfaces of a unit cube, equal tensile force of F is applied. The increase in length of each side will be (Y = Youngs modulus, \[\rho \]= Poissions ratio)
  A)
   \[\frac{F}{Y(1-\sigma )}\]            
  done clear
  B)
          \[\frac{F}{Y(1+\sigma )}\]
  done clear
  C)
   \[\frac{F(1-2\sigma )}{Y}\]         
  done clear
  D)
          \[\frac{F}{Y(1+2\sigma )}\]
  done clear
  View Answer play_arrow

• question_answer81) If the tension on a wire is removed at once, then
  A)
   it will break
  done clear
  B)
   its temperature will reduce
  done clear
  C)
   there will be no change in its temperature
  done clear
  D)
   its temperature increases
  done clear
  View Answer play_arrow

• question_answer82) The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of \[90{}^\circ \] about its perpendicular axis, the electric field at the same point will be
  A)
   E                                            
  done clear
  B)
   \[\frac{E}{4}\]
  done clear
  C)
   \[\frac{E}{2}\]                  
  done clear
  D)
          \[2E\]
  done clear
  View Answer play_arrow

• question_answer83) Among the following properties describing diamagnetism, identify the property that is wrongly stated.
  A)
   Diamagnetic materials do not have permanent magnetic moment
  done clear
  B)
   Diamagnetism is explained in terms of electromagnetic induction
  done clear
  C)
   Diamagnetic materials have a small positive susceptibility
  done clear
  D)
   The magnetic moment of individual electrons neutralize each other
  done clear
  View Answer play_arrow

• question_answer84) Stars are not visible in the day time because
  A)
   stars hide behind the sun
  done clear
  B)
   stars do not reflect sunrays during day
  done clear
  C)
   stars vanish during the day
  done clear
  D)
   atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible
  done clear
  View Answer play_arrow

• question_answer85) If pressure at half the depth of a lake is equal to 2/3 pressure at the bottom of the lake then what is the depth of the lake?
  A)
   10 m                                    
  done clear
  B)
   20 m
  done clear
  C)
   60 m                    
  done clear
  D)
          30 m
  done clear
  View Answer play_arrow

• question_answer86) The mass of the moon is\[\frac{1}{81}\] of the earth but its gravitational pull is\[\frac{1}{6}\]of the earth. It is due to  the fact that
  A)
   the radius of the moon is \[\frac{81}{6}\]of the earth
  done clear
  B)
   the radius of the earth is \[\frac{9}{\sqrt{6}}\]of the moon
  done clear
  C)
   moon is the satellite of the earth
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer87) A moving coil galvanometer has 48 turns and area of coil is \[4\times {{10}^{-2}}{{m}^{2}}\]. If the magnetic field is 0.2 T, then to increase the current sensitivity by 25% without changing area (A) and field (B) the number of turns should become
  A)
   24                                         
  done clear
  B)
   36
  done clear
  C)
   60                         
  done clear
  D)
          54
  done clear
  View Answer play_arrow

• question_answer88) A magnet is parallel to a uniform magnetic field. If it is rotated by \[60{}^\circ \], the work done is 0.8 J. How much work is done in moving it \[30{}^\circ \] further?
  A)
   \[\text{0}\text{.8 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{7}}}\,\text{erg}\]                   
  done clear
  B)
   4.0 J
  done clear
  C)
   8 J                         
  done clear
  D)
          0.8 erg
  done clear
  View Answer play_arrow

• question_answer89) An electric dipole is put in north-south direction in a sphere filled with water. Which of the following statements is correct?
  A)
   Electric flux is coming towards sphere
  done clear
  B)
   Electric flux is coming out of sphere
  done clear
  C)
   Electric flux entering into sphere and leaving the sphere are same
  done clear
  D)
   Water does not permit electric flux to enter into sphere
  done clear
  View Answer play_arrow

• question_answer90) The plates of parallel plate capacitor are charged upto 100V. A 2 mm thick plate is inserted between the plates. Then to maintain the same potential difference, the distance between the plates is increased by 1.6 mm. The dielectric constant of the plate is
  A)
   5                                            
  done clear
  B)
   1.25
  done clear
  C)
   4                            
  done clear
  D)
          2.5
  done clear
  View Answer play_arrow

• question_answer91) The root mean square speed of hydrogen molecules of an ideal hydrogen gas kept in a gas chamber at \[0{}^\circ C\] is 3180 m/s. The pressure on the hydrogen gas is (density of hydrogen gas is \[8.99\,\times {{10}^{-2}}kg/{{m}^{3}},\] atmosphere \[=1.01\,\times {{10}^{5}}\,N/{{m}^{2}}\])
  A)
   1.0 atm                               
  done clear
  B)
   1.5 atm
  done clear
  C)
   2.0 atm               
  done clear
  D)
          3.0 atm
  done clear
  View Answer play_arrow

• question_answer92) Which of the following is the disadvantage of FM over AM?
  A)
   Larger band width requirement
  done clear
  B)
   Larger noise
  done clear
  C)
   Higher modulation power
  done clear
  D)
   Low efficiency
  done clear
  View Answer play_arrow

• question_answer93) In the adjoining figure, four capacitors are shown with their respective capacities and the PD applied. The charge and the PD across the \[4\mu F\] capacitor will be
  A)
   \[600\,\mu C;\,150\,V\]              
  done clear
  B)
   \[300\,\mu C;\,75\,V\]
  done clear
  C)
   \[800\,\mu C;\,200V\]   
  done clear
  D)
          \[580\,\mu C;\,145V\]
  done clear
  View Answer play_arrow

• question_answer94) What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line?
  A)
  \[0{}^\circ \]                                      
  done clear
  B)
  \[90{}^\circ \]
  done clear
  C)
   \[180{}^\circ \]                
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer95) An electron microscope is superior to an optical microscope in
  A)
   having better resolving power
  done clear
  B)
   being easy to handle
  done clear
  C)
   low cost
  done clear
  D)
   quickness of observation
  done clear
  View Answer play_arrow

• question_answer96) An L-C-R series circuit with a resistance of 100 ft is connected to an AC source of 200 V and angular frequency 300 rad/s. When only the capacitor is removed, the current lags behind the voltage by \[60{}^\circ \]. When only the inductor is removed the current leads the voltage by \[60{}^\circ \] The average power dissipated is
  A)
   50 W                                    
  done clear
  B)
   100 W 
  done clear
  C)
   200 W                  
  done clear
  D)
          400 W
  done clear
  View Answer play_arrow

• question_answer97) How much work must be done to pull apart the electron and the proton that make up the hydrogen atom, if the atom is initially in the state with n = 2?
  A)
   \[\text{13}\text{.6 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]      
  done clear
  B)
   \[\text{3}\text{.6 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]
  done clear
  C)
   \[\text{1}\text{.51 }\!\!\times\!\!\text{ 1}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-19}}}\text{J}\]      
  done clear
  D)
   zero
  done clear
  View Answer play_arrow

• question_answer98) If the current 3 A flowing in the primary coil ii made zero in 0.1 s. The emf induced in the secondary coil is 1.5 V. The mutual inductance between the coils is
  A)
   0.05 H                                  
  done clear
  B)
   1.05 H
  done clear
  C)
   0.1 H                    
  done clear
  D)
          0.2 H
  done clear
  View Answer play_arrow

• question_answer99) Radius of the curved road on national highway is R. Width of the road is b. The outer edge of the road is raised by h with respect to inner edge so that a car with velocity v can pass safe over it. The value of h is
  A)
   \[\frac{{{v}^{2}}b}{Rg}\]                                             
  done clear
  B)
   \[\frac{v}{Rgb}\]
  done clear
  C)
   \[\frac{{{v}^{2}}R}{g}\]                
  done clear
  D)
          \[\frac{{{v}^{2}}b}{R}\]
  done clear
  View Answer play_arrow

• question_answer100) What is the (rms) value of an alternating current which when passed through a resistor produces heat which is thrice that of produced by a direct current of 2 A in the same resistor?
  A)
   6 A                                        
  done clear
  B)
   2 A
  done clear
  C)
   3.46 A                  
  done clear
  D)
          0.66 A
  done clear
  View Answer play_arrow

• question_answer101) The monomer units of starch are
  A)
   \[\alpha -\]glucose                        
  done clear
  B)
          \[\beta -\]glucose                         
  done clear
  C)
          pyranose           
  done clear
  D)
          galactose
  done clear
  View Answer play_arrow

• question_answer102) The only vitamin with metal atom in it, is
  A)
   vitamin\[-A\]                   
  done clear
  B)
          vitamin\[-K\]
  done clear
  C)
          vitamin\[-{{B}_{12}}\]                  
  done clear
  D)
          vitamin\[-E\]
  done clear
  View Answer play_arrow

• question_answer103) Which of the following is used to make non-stick cookware?
  A)
   PVC
  done clear
  B)
          Polystyrene
  done clear
  C)
          Polyethylene terephthalate
  done clear
  D)
          Polytetrafluoro ethylene
  done clear
  View Answer play_arrow

• question_answer104) Nylon-6 is made from
  A)
   1, 3-butadiene                
  done clear
  B)
          chloroprene
  done clear
  C)
          adipic acid         
  done clear
  D)
          carpolactum
  done clear
  View Answer play_arrow

• question_answer105) The functional group which is found in amino acid is
  A)
  \[-COOH\]                          
  done clear
  B)
         \[-N{{H}_{2}}\]
  done clear
  C)
         \[-C{{H}_{3}}\]                 
  done clear
  D)
          Both (a) and (b)
  done clear
  View Answer play_arrow

• question_answer106) The units of conductivity are
  A)
  \[oh{{m}^{-1}}\]                              
  done clear
  B)
         \[oh{{m}^{-1}}c{{m}^{-1}}\]
  done clear
  C)
         \[oh{{m}^{-2}}c{{m}^{2}}equi{{v}^{-1}}\]             
  done clear
  D)
         \[oh{{m}^{-1}}c{{m}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer107) The colloidal system in which the disperse phase and dispersion medium are both liquids is known as
  A)
   a gel                                     
  done clear
  B)
          an aerosol
  done clear
  C)
          an emulsion     
  done clear
  D)
          a foam
  done clear
  View Answer play_arrow

• question_answer108) Which of the following is not an ore of magnesium?
  A)
   Gypsum             
  done clear
  B)
          Dolomite
  done clear
  C)
          Magnesite       
  done clear
  D)
          Carnallite
  done clear
  View Answer play_arrow

• question_answer109) An example of water soluble vitamin is
  A)
   vitamin-D          
  done clear
  B)
          vitamin-E
  done clear
  C)
          vitamin-A          
  done clear
  D)
          vitamin-C
  done clear
  View Answer play_arrow

• question_answer110) During smelting an additional substance is added which combines with impurities to form a fusible product which is known as
  A)
   mud                                     
  done clear
  B)
          slag
  done clear
  C)
          flux                                      
  done clear
  D)
          gangue
  done clear
  View Answer play_arrow

• question_answer111) Isotonic solutions are the solutions having the same
  A)
   surface tension               
  done clear
  B)
          vapour pressure
  done clear
  C)
          osmotic pressure           
  done clear
  D)
          viscosity
  done clear
  View Answer play_arrow

• question_answer112) Hydrogen bond is strongest in
  A)
  \[S-H\cdot \cdot \cdot \cdot \cdot O\]                 
  done clear
  B)
         \[O-H\cdot \cdot \cdot \cdot \cdot S\]
  done clear
  C)
         \[F-H\cdot \cdot \cdot \cdot \cdot F\]                  
  done clear
  D)
         \[O-H\cdot \cdot \cdot \cdot \cdot N\]
  done clear
  View Answer play_arrow

• question_answer113) Match List I and List II and pick out correct matching codes from the given choices.

  List I (Compound)	List II (Structure)
  A    \[Cl{{F}_{3}}\]	1. Square planar
  B    \[PC{{l}_{5}}\]	2. Tetrahedral
  C    \[I{{F}_{5}}\]	3. Trigonal by pramidal
  D    \[CC{{l}_{4}}\]	4. Square pyradimal
  E    \[Xe{{F}_{4}}\]	5. T-Shaped

  A)
  \[A-5,\,\,B-4,\,\,C-3,\,\,D-2,\,\,E-1\]
  done clear
  B)
         \[A-5,\,\,B-3,\,\,C-4,\,\,D-2,\,\,E-1\]
  done clear
  C)
         \[A-5,\,\,B-3,\,\,C-4,\,\,D-1,\,\,E-2\]
  done clear
  D)
         \[A-4,\,\,B-3,\,\,C-5,\,\,D-2,\,\,E-1\]
  done clear
  View Answer play_arrow

• question_answer114) In which of the following pairs, the two species have identical bond order?
  A)
  \[N_{2}^{-},\,\,O_{2}^{2-}\]                       
  done clear
  B)
         \[N_{2}^{+},\,\,O_{2}^{-}\]
  done clear
  C)
         \[N_{2}^{-},\,\,O_{2}^{+}\]                        
  done clear
  D)
         \[O_{2}^{+},\,\,N_{2}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer115) The mass of a photon with wavelength \[3.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] is
  A)
  \[6.135\times {{10}^{-19}}\]                       
  done clear
  B)
         \[5.6135\times {{10}^{-29}}\]
  done clear
  C)
         \[6.100\times {{10}^{-19}}\]                       
  done clear
  D)
         \[6.135\times {{10}^{-29}}\]
  done clear
  View Answer play_arrow

• question_answer116) The following compound is used as
  A)
   an anti-inflammatory compound
  done clear
  B)
          analgesic
  done clear
  C)
          hypnotic
  done clear
  D)
          antiseptic
  done clear
  View Answer play_arrow

• question_answer117) Presence of a nitro group in a benzene ring
  A)
   renders the ring basic
  done clear
  B)
          deactivates the ring towards nucleophilic substitution
  done clear
  C)
          deactivates the ring towards electrophilic substitution
  done clear
  D)
          activates the ring towards electrophilic substitution
  done clear
  View Answer play_arrow

• question_answer118) Polymer used in bullet proof glass is
  A)
   PMMA                
  done clear
  B)
          lexan
  done clear
  C)
          nomex                                
  done clear
  D)
          Kevlar
  done clear
  View Answer play_arrow

• question_answer119) Which of the following is a pair of isobar?
  A)
  \[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{13}}\]                
  done clear
  B)
         \[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{14}}\]
  done clear
  C)
         \[_{7}{{N}^{14}},\,{{\,}_{8}}{{O}^{16}}\]                               
  done clear
  D)
         \[_{7}{{N}^{13}},\,{{\,}_{8}}{{O}^{18}}\]
  done clear
  View Answer play_arrow

• question_answer120) The nitrogen atom has 7 protons and 7 electrons. The nitride ion will have
  A)
   7 protons and 10 electrons
  done clear
  B)
          4 protons and 7 electrons
  done clear
  C)
          4 protons and 10 electrons
  done clear
  D)
          10 protons and 7 electrons
  done clear
  View Answer play_arrow

• question_answer121) In which of the following the magnetic character is not correct?
  A)
  \[CuCl_{4}^{2}-1\]unpaired electron
  done clear
  B)
         \[[Fe{{({{H}_{2}}{{O}_{6}}]}^{2+}}-5\]unpaired electrons
  done clear
  C)
         \[{{[Zn{{(N{{H}_{3}})}_{2}}]}^{2+}}\]Diamagnetic
  done clear
  D)
         \[{{[Co{{F}_{6}}]}^{3-}}-4\]unpaired electrons
  done clear
  View Answer play_arrow

• question_answer122) The complex used as an anticancer agent is
  A)
  \[mer-[CoC{{l}_{3}}{{(N{{H}_{3}})}_{3}}]\]
  done clear
  B)
         \[cis-[PtC{{l}_{2}}{{(N{{H}_{3}})}_{2}}]\]
  done clear
  C)
         \[cis-{{K}_{2}}[PtB{{r}_{2}}C{{l}_{2}}]\]
  done clear
  D)
         \[N{{a}_{2}}[Co{{(Cl)}_{4}}]\]
  done clear
  View Answer play_arrow

• question_answer123) EDTA has coordination number
  A)
   3                                            
  done clear
  B)
          4
  done clear
  C)
          5                                            
  done clear
  D)
          6
  done clear
  View Answer play_arrow

• question_answer124) 3-pentanol is an example of
  A)
   primary alcohol               
  done clear
  B)
          secondary alcohol
  done clear
  C)
          tertiary alcohol                
  done clear
  D)
          aromatic alcohol
  done clear
  View Answer play_arrow

• question_answer125) The incorrect IUPAC name is
  A)
  \[\underset{\text{2-methyl-3-butanone}}{\mathop{C{{H}_{3}}\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
  done clear
  B)
         \[\underset{2,\,\,3-\text{dimethylpentane}}{\mathop{C{{H}_{3}}\underset{\begin{smallmatrix}  || \\  C{{H}_{2}} \end{smallmatrix}}{\mathop{C}}\,H-\underset{\begin{smallmatrix}  | \\  C{{H}_{2}}C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
  done clear
  C)
         \[\underset{\text{2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv C-C{{H}_{2}}-C{{H}_{3}}}}\,\]
  done clear
  D)
         \[\underset{\text{2-bromo-3-chloro-butane}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,H-\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}}}\,\]
  done clear
  View Answer play_arrow

• question_answer126) Which alkene on ozonolysis gives\[C{{H}_{3}}C{{H}_{2}}CHO\] and\[C{{H}_{3}}COC{{H}_{3}}\]?
  A)
  \[C{{H}_{3}}C{{H}_{2}}CH=C{{(C{{H}_{3}})}_{2}}\]
  done clear
  B)
         \[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{2}}C{{H}_{3}}\]
  done clear
  C)
         \[C{{H}_{3}}C{{H}_{2}}CH=CHC{{H}_{3}}\]
  done clear
  D)
         \[{{(C{{H}_{3}})}_{2}}CH=CHC{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer127) Isopropyl bromide on Wurtz reaction gives
  A)
   hexane               
  done clear
  B)
          propane
  done clear
  C)
          2, 3-dimethylbutane
  done clear
  D)
          neohexane
  done clear
  View Answer play_arrow

• question_answer128) Which of the following represents the given mode of hybridization\[s{{p}^{2}}-s{{p}^{2}}-sp-sp\] from left to right?
  A)
  \[{{H}_{2}}C=CH-C\equiv N\]
  done clear
  B)
         \[HC\equiv C-C\equiv CH\]
  done clear
  C)
         \[{{H}_{2}}C=C=C{{H}_{2}}\]
  done clear
  D)
          
  done clear
  View Answer play_arrow

• question_answer129) \[B{{F}_{3}}\]is
  A)
   electron-deficient compound
  done clear
  B)
          Lewis base
  done clear
  C)
          used as rocket fuel
  done clear
  D)
          ionic compound
  done clear
  View Answer play_arrow

• question_answer130) \[C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  \underset{\centerdot \,\,\,\centerdot }{\mathop{O\,\,\mathbf{:}}}\, \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{2}}=\underset{\begin{smallmatrix}  | \\  \underset{\centerdot \,\,\,\centerdot }{\mathop{\mathbf{:}O\mathbf{:}}}\, \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]are
  A)
   resonating structures
  done clear
  B)
          tautomers
  done clear
  C)
          geometrical isomers
  done clear
  D)
          optical isomers
  done clear
  View Answer play_arrow

• question_answer131) Fluorobenzene can be synthesized in the laboratory
  A)
   from aniline by diazotization followed by heating the diazonium salt with\[HB{{F}_{4}}\]
  done clear
  B)
          by direct fluorination of benzene with \[{{F}_{2}}\] gas
  done clear
  C)
          by reacting bromobenzene with \[NaF\] solution
  done clear
  D)
          by heating phenol with \[HF\] and \[KF\]
  done clear
  View Answer play_arrow

• question_answer132) Glucose reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of\[X\]is
  A)
   three                                   
  done clear
  B)
          two
  done clear
  C)
          one                                      
  done clear
  D)
          four
  done clear
  View Answer play_arrow

• question_answer133) The wavelength of which series lie towards the ultraviolet
  A)
   Lymann
  done clear
  B)
          Balmer
  done clear
  C)
          Paschen             
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer134) A \[p-\]orbital accommodate maximum
  A)
   4 electrons
  done clear
  B)
          6 electrons
  done clear
  C)
          2 electrons with parallel spins
  done clear
  D)
          2 electrons with opposite spins
  done clear
  View Answer play_arrow

• question_answer135) Ease of formation of the cation is favoured by
  A)
   lower value of ionization potential
  done clear
  B)
          lower value of electron affinity
  done clear
  C)
          higher value of electron affinity
  done clear
  D)
          lower value of electronegativity
  done clear
  View Answer play_arrow

• question_answer136) What is the mole fraction of solute in \[2.5\,\,m\]aqueous solution?
  A)
  \[0.430\]                             
  done clear
  B)
         \[4.30\]
  done clear
  C)
         \[3.40\]                               
  done clear
  D)
         \[0.043\]
  done clear
  View Answer play_arrow

• question_answer137) Which of the following carbon atoms is likely to possess tetrahedral geometry? \[{{H}_{2}}\overset{4}{\mathop{C}}\,=\overset{3}{\mathop{C}}\,H-\overset{2}{\mathop{C}}\,{{H}_{2}}-\overset{1}{\mathop{C}}\,OOH\]
  A)
   1                                            
  done clear
  B)
          2
  done clear
  C)
          3                                            
  done clear
  D)
          4
  done clear
  View Answer play_arrow

• question_answer138) The compound with an isopropyl group is
  A)
   2, 2, 3, 3-tetramethylpentane
  done clear
  B)
          2, 2-dimethylpentane
  done clear
  C)
          2, 2, 3, trimethylpentane
  done clear
  D)
          2-methylpentane
  done clear
  View Answer play_arrow

• question_answer139) Borax is used as a cleansing agent because on dissolving in water, it gives
  A)
   alkaline solution
  done clear
  B)
          acidic solution
  done clear
  C)
          bleaching solution
  done clear
  D)
          amphoteric solution
  done clear
  View Answer play_arrow

• question_answer140) Which is strongest Lewis acid?
  A)
  \[B{{F}_{3}}\]                                    
  done clear
  B)
         \[BC{{l}_{3}}\]
  done clear
  C)
         \[BB{{r}_{3}}\]                                  
  done clear
  D)
         \[B{{I}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer141) Which of the following has maximum unpaired \[d-\]electrons?
  A)
  \[Z{{n}^{2+}}\]                                 
  done clear
  B)
         \[F{{e}^{2+}}\]
  done clear
  C)
         \[N{{i}^{2+}}\]                                  
  done clear
  D)
         \[C{{u}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer142) In the reaction \[C{{H}_{3}}C{{H}_{2}}COOH\xrightarrow{C{{l}_{2}},\,\,P}X\xrightarrow{alc.\,\,KOH}Y,\,\,Y\]is
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]
  done clear
  B)
         \[C{{H}_{2}}=CHCOOH\]
  done clear
  C)
         \[C{{H}_{3}}C{{H}_{2}}CN\]
  done clear
  D)
         \[\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}C=COOH\]
  done clear
  View Answer play_arrow

• question_answer143) Select the \[_{p}{{K}_{a}}\] value of the strongest acid.
  A)
  \[1.0\]                                  
  done clear
  B)
         \[3.0\]
  done clear
  C)
         \[2.0\]                                  
  done clear
  D)
         \[4.5\]
  done clear
  View Answer play_arrow

• question_answer144) Hinsbergs reagent is
  A)
   benzene sulphonyl chloride
  done clear
  B)
          benzene sulphonic acid
  done clear
  C)
          phenyl isocyanide
  done clear
  D)
          benzene sulphonamide
  done clear
  View Answer play_arrow

• question_answer145) Which of the following will not give a primary amine?
  A)
  \[C{{H}_{3}}CO{{H}_{2}}\xrightarrow{B{{r}_{2}},\,\,KOH}\]
  done clear
  B)
         \[C{{H}_{3}}CN\xrightarrow{LiAl{{H}_{4}}}\]
  done clear
  C)
         \[C{{H}_{3}}NHC\xrightarrow{LiAl{{H}_{4}}}\]
  done clear
  D)
         \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow{LiAl{{H}_{4}}}\]
  done clear
  View Answer play_arrow

• question_answer146) The product formed as a result of reaction of \[C{{H}_{3}}MgBr\] and\[C{{O}_{2}}\], on further hydrolysis gives
  A)
  \[C{{H}_{3}}COOH\]                       
  done clear
  B)
         \[HCOOH\]
  done clear
  C)
          oxalic acid          
  done clear
  D)
          acetic acid
  done clear
  View Answer play_arrow

• question_answer147) The reaction \[RC{{H}_{2}}C{{H}_{2}}COOH\xrightarrow[B{{r}_{2}}]{\text{Red}\,\,P}RC{{H}_{2}}\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\mathop{C}}\,HCOOH\]
  A)
   Reimer-Tiemann reaction
  done clear
  B)
          Hell Volhard Zelinsky reaction
  done clear
  C)
          Cannizaros reaction
  done clear
  D)
          Sandmeyers reaction
  done clear
  View Answer play_arrow

• question_answer148) Which of the following compound is most reactive towards nucleophilic addition reaction?
  A)
   Ethanal               
  done clear
  B)
          Propanal
  done clear
  C)
          Butanone          
  done clear
  D)
          Propanone
  done clear
  View Answer play_arrow

• question_answer149) For an equilibrium reaction, the rate constants for the forward and the backward reaction are \[2.38\times {{10}^{-4}}\] and \[8.15\times {{10}^{-5}}\] respectively. What will be the equilibrium constant for the reaction?
  A)
  \[92.2\]                               
  done clear
  B)
         \[29.2\]
  done clear
  C)
         \[20.2\]                               
  done clear
  D)
         \[2.92\]
  done clear
  View Answer play_arrow

• question_answer150) Which acid is present in vinegar?
  A)
   Hydrochloric acid
  done clear
  B)
          Acetic acid
  done clear
  C)
          Citric acid
  done clear
  D)
          Tartaric acid
  done clear
  View Answer play_arrow

• question_answer151) Which one of the following types of drugs reduces fever?
  A)
   Analgesics         
  done clear
  B)
          Antipyretics
  done clear
  C)
          Aspirin                
  done clear
  D)
          Tranquillizers
  done clear
  View Answer play_arrow

• question_answer152) In\[HCO{{O}^{-}}\], the two carbon-oxygen bonds are found to be of equal length. What is the reason for this?
  A)
   The anion is obtained by the removal of a proton from the acid molecule
  done clear
  B)
          Electronic orbitals of carbon atoms are hybridized
  done clear
  C)
          The \[C=O\] bond is weaker than \[C-O\] bond
  done clear
  D)
          The anion \[HCO{{O}^{-}}\] has two resonating Structures
  done clear
  View Answer play_arrow

• question_answer153) In a set of reactions, acetic acid yielded product \[D.C{{H}_{3}}COOH\xrightarrow{SOC{{l}_{2}}}A\xrightarrow[Anhy.\,\,AlC{{l}_{3}}]{Benzene}\]\[B\xrightarrow{HCN}C\xrightarrow{HOH}D\]. The structure of\[D\]would be
  A)
  
  done clear
  B)
          
  done clear
  C)
          
  done clear
  D)
        
  done clear
  View Answer play_arrow

• question_answer154) How many bonds are there in
  A)
  \[14\sigma ,\,\,8\pi \]                   
  done clear
  B)
         \[18\sigma ,\,\,8\pi \]
  done clear
  C)
         \[19\sigma ,\,\,4\pi \]                   
  done clear
  D)
         \[14\sigma ,\,\,2\pi \]
  done clear
  View Answer play_arrow

• question_answer155) Principal, azimuthal and magnetic quantum numbers are respectively related to
  A)
   size, orientation and shape
  done clear
  B)
          size, shape and orientation
  done clear
  C)
          shape, size and orientation
  done clear
  D)
          None of the above
  done clear
  View Answer play_arrow

• question_answer156) Paulis exclusion principle states that
  A)
   the nucleus of an atom is negatively charged
  done clear
  B)
          electrons revolve around the nucleus in circular orbits
  done clear
  C)
          electrons enter into lowest energy orbitals
  done clear
  D)
          no two electrons in an atom can have all the four quantum numbers identical
  done clear
  View Answer play_arrow

• question_answer157) The geometry of \[XeO{{F}_{2}}\] is
  A)
   pyramidal          
  done clear
  B)
          T-shaped
  done clear
  C)
          octahedral       
  done clear
  D)
          tetrahedral
  done clear
  View Answer play_arrow

• question_answer158) The noble gas compound prepared by Harriett was
  A)
  \[Xe{{O}_{3}}\]                
  done clear
  B)
         \[XePt{{F}_{6}}\]
  done clear
  C)
         \[Kr{{F}_{2}}\]                  
  done clear
  D)
         \[Xe{{F}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer159) Which of the following has highest ionization enthalpy?
  A)
  \[P\]                                     
  done clear
  B)
         \[N\]
  done clear
  C)
         \[As\]                                   
  done clear
  D)
         \[Sb\]
  done clear
  View Answer play_arrow

• question_answer160) \[X\] is heated with soda lime and gives ethane. \[X\] is
  A)
   ethanoic acid                   
  done clear
  B)
          methanoic acid
  done clear
  C)
          propanoic acid                 
  done clear
  D)
          Either (a) or (c)
  done clear
  View Answer play_arrow

• question_answer161) The correct order regarding the electronegativity of hybrid orbitals of carbon is
  A)
  \[sp<s{{p}^{2}}>s{{p}^{3}}\]      
  done clear
  B)
         \[sp<s{{p}^{2}}<s{{p}^{3}}\]
  done clear
  C)
         \[sp>s{{p}^{2}}<s{{p}^{3}}\]      
  done clear
  D)
         \[sp>s{{p}^{2}}>s{{p}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer162) Which of the following gas mixture is used by the divers inside the sea?
  A)
  \[{{O}_{2}}+He\]                             
  done clear
  B)
         \[{{O}_{2}}+Xe\]
  done clear
  C)
         \[{{O}_{2}}+Ar\]                              
  done clear
  D)
         \[{{O}_{2}}+{{N}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer163) The laughing gas is
  A)
   nitrogen oxide
  done clear
  B)
          nitric oxide
  done clear
  C)
          nitrogen trioxide
  done clear
  D)
          nitrogen pentoxide
  done clear
  View Answer play_arrow

• question_answer164) The number of nodal plane \[5\,\,d\] orbital has is
  A)
   zero                                     
  done clear
  B)
          one
  done clear
  C)
          two                                      
  done clear
  D)
          three
  done clear
  View Answer play_arrow

• question_answer165) The atomic number of \[Ni\] and \[Cu\] are \[28\] and \[29\] respectively. The electronic configuration\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}\] represents
  A)
  \[Ni\]                                   
  done clear
  B)
         \[N{{i}^{2+}}\]
  done clear
  C)
         \[C{{u}^{2+}}\]                                 
  done clear
  D)
         \[C{{u}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer166) How many ions are produced from\[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]in solution?
  A)
  \[6\]                                     
  done clear
  B)
         \[4\]
  done clear
  C)
         \[3\]                                     
  done clear
  D)
         \[2\]
  done clear
  View Answer play_arrow

• question_answer167) Among the alkali metals, cesium is the most reactive because
  A)
   its incomplete shell is nearest to the nucleus
  done clear
  B)
          its has a single electron in the valence shell
  done clear
  C)
          it is the heaviest alkali metal
  done clear
  D)
          the outermost electron is more loosely bound than the outermost electron of the other alkali metals
  done clear
  View Answer play_arrow

• question_answer168) The ionic mobility of alkali metal ions in aqueous solution is maximum for
  A)
  \[{{K}^{+}}\]                                      
  done clear
  B)
         \[R{{b}^{+}}\]
  done clear
  C)
         \[L{{i}^{+}}\]                                     
  done clear
  D)
         \[N{{a}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer169) Gypsum on heating to \[390\,\,K\] gives
  A)
  \[CaS{{O}_{4}}\cdot 2{{H}_{2}}O\]          
  done clear
  B)
         \[CaS{{O}_{4}}\]
  done clear
  C)
         \[CaS{{O}_{4}}\cdot \frac{1}{2}{{H}_{2}}O\]        
  done clear
  D)
         \[S{{O}_{3}}\]and\[CaO\]
  done clear
  View Answer play_arrow

• question_answer170) Epsom salt is
  A)
  \[MgS{{O}_{4}}\cdot 7{{H}_{2}}O\]         
  done clear
  B)
         \[CaS{{O}_{4}}\cdot {{H}_{2}}O\]
  done clear
  C)
         \[MgS{{O}_{4}}\cdot 2{{H}_{2}}O\]         
  done clear
  D)
         \[BaS{{O}_{4}}\cdot 2{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer171) The temperature at which \[28\,\,g\] of \[{{N}_{2}}\] will occupy a volume of \[10.0\,\,L\] at\[2.46\,\,atm\]
  A)
  \[299.6\,\,K\]                    
  done clear
  B)
         \[{{0}^{o}}C\]
  done clear
  C)
         \[273\,\,K\]                       
  done clear
  D)
         \[{{10}^{o}}C\]
  done clear
  View Answer play_arrow

• question_answer172) Para and ortho hydrogen differ in
  A)
   atomic number
  done clear
  B)
          atomic mass
  done clear
  C)
          spins of protons
  done clear
  D)
          number of neutrons
  done clear
  View Answer play_arrow

• question_answer173) Atomic orbitals of carbon in carbon dioxide are
  A)
  \[sp-\]hybridized            
  done clear
  B)
         \[s{{p}^{3}}d-\]hybridized
  done clear
  C)
         \[s{{p}^{2}}-\]hybridized             
  done clear
  D)
         \[s{{p}^{3}}-\]hybridized
  done clear
  View Answer play_arrow

• question_answer174) The appearance of colour in solid alkali metal halides is generally due to
  A)
   Schottky defect              
  done clear
  B)
          Frenkel defect
  done clear
  C)
          Interstitial position        
  done clear
  D)
          \[F-\]centres
  done clear
  View Answer play_arrow

• question_answer175) Which among the following factors is most important in making fluorine the strongest oxidizing agent?
  A)
   Electron gain enthalpy
  done clear
  B)
          Ionization enthalpy
  done clear
  C)
          Hydration enthalpy
  done clear
  D)
          Bond dissociation enthalpy
  done clear
  View Answer play_arrow

• question_answer176) How many coulombs are required to deposit \[50\,\,g\] of aluminium when the electrode reaction is                 \[A{{l}^{3+}}+3{{e}^{-}}\xrightarrow{{}}Al\]
  A)
  \[536111\,\,C\]                
  done clear
  B)
         \[536.111\,\,C\]
  done clear
  C)
         \[96500\,\,C\]                   
  done clear
  D)
         \[38600\,\,C\]
  done clear
  View Answer play_arrow

• question_answer177) In\[Cu\,\,(At.\,\,No.29)\]
  A)
   13 electrons have spin in one direction and 16 electrons in other direction
  done clear
  B)
          14 electrons have spin one direction and 15 electrons in other direction
  done clear
  C)
          one electron can have spin only in the clockwise direction
  done clear
  D)
          None of the above is correct
  done clear
  View Answer play_arrow

• question_answer178) The boiling point of water is\[{{100}^{o}}C\]. What will be the boiling point of an aqueous solution containing \[0.6\,\,g\] of urea (molar mass\[=60\]) in \[100\,\,g\] of water?(\[{{K}_{b}}\]for water\[=0.52\,\,K/m\])
  A)
  \[{{100.052}^{o}}C\]                      
  done clear
  B)
         \[{{101.052}^{o}}C\]
  done clear
  C)
         \[{{120.52}^{o}}C\]                         
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer179) Sodium metal crystallizes in body centred cubic lattice with cell edge\[4.29\overset{\text{o}}{\mathop{\text{A}}}\,\] . What is the radius of sodium atom?
  A)
  \[2.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                       
  done clear
  B)
         \[6.81\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
  done clear
  C)
         \[1.68\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                       
  done clear
  D)
         \[1.86\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
  done clear
  View Answer play_arrow

• question_answer180) Hydrogen sulphide is acidic while water is neutral. The reason is
  A)
   molecular weight of \[{{H}_{2}}S\] is more than \[{{H}_{2}}O\]
  done clear
  B)
          water molecules associate, while \[{{H}_{2}}S\] molecules do not
  done clear
  C)
          \[H-S\]bond is weaker than \[H-O\] bond due to the bigger size of \[S-\]atom
  done clear
  D)
          S-atoms has less affinity for hydrogen atom than \[O\] atom has for it
  done clear
  View Answer play_arrow

• question_answer181) Percentage of cation in ammonium dichromate \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\] is
  A)
  \[41.29%\]                         
  done clear
  B)
         \[14.29%\]
  done clear
  C)
         \[20.29%\]                         
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer182) Identify the compounds \[A\] and \[B\] in the following reaction sequence. \[Ca{{C}_{2}}(s)+{{H}_{2}}O(l)\xrightarrow{{}}A(g)\xrightarrow[HgS{{O}_{4}}]{{{H}_{2}}S{{O}_{4}}}B(l)\]
  A)
   \[A\]is ethylene, \[B\] is acetaldehyde
  done clear
  B)
          \[A\]is acetylene, \[B\] is propionaldehyde
  done clear
  C)
          \[A\]is ethane, \[B\] is ethanol
  done clear
  D)
          \[A\]is acetylene, \[B\] is acetaldehyde
  done clear
  View Answer play_arrow

• question_answer183) The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
  A)
  \[F{{e}_{4}}{{[Fe(C{{N}_{6}})]}_{3}}\]
  done clear
  B)
         \[N{{a}_{3}}[Fe{{(CN)}_{6}}]\]
  done clear
  C)
         \[Fe{{(CN)}_{3}}\]
  done clear
  D)
         \[N{{a}_{4}}[Fe{{(CN)}_{5}}COS]\]
  done clear
  View Answer play_arrow

• question_answer184) The arrangement of\[{{(C{{H}_{3}})}_{3}}C-,\,\,{{(C{{H}_{3}})}_{2}}CH-,\]\[C{{H}_{3}}C{{H}_{2}}-\]when attached to benzene or unsaturated group in increasing order of inductive effect is
  A)
  \[{{(C{{H}_{3}})}_{3}}C-<{{(C{{H}_{3}})}_{3}}CH-<C{{H}_{3}}C{{H}_{2}}-\]
  done clear
  B)
         \[C{{H}_{3}}C{{H}_{2}}-<{{(C{{H}_{3}})}_{2}}CH-<{{(C{{H}_{3}})}_{3}}C-\]
  done clear
  C)
         \[{{(C{{H}_{3}})}_{2}}CH-<{{(C{{H}_{3}})}_{3}}C-<C{{H}_{3}}C{{H}_{2}}-\]
  done clear
  D)
         \[{{(C{{H}_{3}})}_{3}}C-<C{{H}_{3}}C{{H}_{2}}-<{{(C{{H}_{3}})}_{2}}CH-\]
  done clear
  View Answer play_arrow

• question_answer185) Pieces of wood burn faster than a log of wood of the same mass because
  A)
   surface area of log of wood is larger and needs more time to burn
  done clear
  B)
          pieces of wood have large surface area
  done clear
  C)
          all pieces of wood catch fire at the same time
  done clear
  D)
          block of wood has higher density than pieces of the same wood
  done clear
  View Answer play_arrow

• question_answer186) Bravais lattices are of
  A)
   8 types               
  done clear
  B)
          9 types
  done clear
  C)
          12 types             
  done clear
  D)
          14 types
  done clear
  View Answer play_arrow

• question_answer187) In the following nuclear reaction, the other product is                 \[_{52}T{{e}^{130}}{{+}_{1}}{{H}^{2}}{{\xrightarrow{{}}}_{53}}{{I}^{131}}+?\]
  A)
   positron             
  done clear
  B)
          one neutron
  done clear
  C)
          proton                
  done clear
  D)
          alpha particle
  done clear
  View Answer play_arrow

• question_answer188) The number of a and p-particles emitted in the nuclear reaction                 \[_{90}T{{h}^{228}}{{\xrightarrow{{}}}_{83}}B{{i}^{212}}\]are
  A)
  \[4\alpha \]and\[1\beta \]                          
  done clear
  B)
         \[3\alpha \]and\[7\beta \]
  done clear
  C)
         \[8\alpha \]and\[1\beta \]                          
  done clear
  D)
         \[4\alpha \]and\[7\beta \]
  done clear
  View Answer play_arrow

• question_answer189) Schottky defect in crystals is observed when
  A)
   density of crystal is increased
  done clear
  B)
          an ion leaves its normal site and occupies an interstitial site
  done clear
  C)
          equal number of cations and anions are missing from the lattice
  done clear
  D)
          unequal number of cations and anions are missing from the lattice
  done clear
  View Answer play_arrow

• question_answer190) What happens when an egg is kept in saturated solution of \[NaCl\] after removing its hard shell in\[dil\,\,HCl\]?
  A)
   Egg will swell
  done clear
  B)
          Egg will shrink
  done clear
  C)
          Egg will remain same
  done clear
  D)
          Egg will first shrink and then swell
  done clear
  View Answer play_arrow

• question_answer191) Which of the following is the expression of Raoults law? (\[p=\]vapour pressure of pure solvent, \[{{p}_{s}}=\]vapour pressure of the solution)
  A)
  \[\frac{p-{{p}_{s}}}{p}=\frac{n}{n+N}\]
  done clear
  B)
         \[\frac{{{p}_{s}}-p}{p}=\frac{N}{N+n}\]
  done clear
  C)
         \[\frac{p-{{p}_{s}}}{{{p}_{s}}}=\frac{N}{N-n}\]
  done clear
  D)
         \[\frac{{{p}_{s}}-p}{{{p}_{s}}}=\frac{N-n}{N}\]
  done clear
  View Answer play_arrow

• question_answer192) A catalyst alter the rate of reaction by
  A)
   altering enthalpy
  done clear
  B)
          altering internal energy
  done clear
  C)
          altering energy of activation
  done clear
  D)
          All of the above
  done clear
  View Answer play_arrow

• question_answer193) The noble gas which can diffuse through rubber and glass easily is
  A)
  \[Xe\]                                  
  done clear
  B)
         \[Ne\]
  done clear
  C)
         \[Ar\]                                   
  done clear
  D)
         \[He\]
  done clear
  View Answer play_arrow

• question_answer194) Among the following molecule

  (i) \[Xe{{O}_{3}}\]

  (ii)\[Xe{{O}_{4}}\]

  (iii)\[Xe{{F}_{6}}\]

  those having same number of lone pairs on\[Xe\] are
  A)
   (i) and (iii) only
  done clear
  B)
          (i) and (ii) only
  done clear
  C)
          (ii) and (iii) only
  done clear
  D)
          (i), (ii) and (iii)
  done clear
  View Answer play_arrow

• question_answer195) In the following halogen compounds, which compound undergoes fastest \[{{S}_{N}}1\] reaction?

  (i)

  (ii)

  (iii)

  A)
   (i)                                          
  done clear
  B)
          (ii)
  done clear
  C)
          (iii)                                        
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer196) \[UV\]radiations brings about
  A)
   skin cancer        
  done clear
  B)
          mouth cancer
  done clear
  C)
          lung cancer      
  done clear
  D)
          liver cancer
  done clear
  View Answer play_arrow

• question_answer197) Sublimation is a process in which a solid
  A)
   changes into vapour form
  done clear
  B)
          changes into another allotropic form
  done clear
  C)
          changes into liquid form
  done clear
  D)
          None of the above
  done clear
  View Answer play_arrow

• question_answer198) Pollution is
  A)
   removal of top soil
  done clear
  B)
          release of toxic/undesirable materials in environment
  done clear
  C)
          conservation of energy
  done clear
  D)
          All of the above
  done clear
  View Answer play_arrow

• question_answer199) Gas released during Bhopal tragedy was
  A)
   methyl isocyanate
  done clear
  B)
          potassium isothiocyanate
  done clear
  C)
          sodium isothiocyanate
  done clear
  D)
          ethyl isothiocyanate
  done clear
  View Answer play_arrow

• question_answer200) In\[AgBr\], these can occur
  A)
   Only Schottky defect
  done clear
  B)
          Only Frenkel defect
  done clear
  C)
          Both (a) and (b)
  done clear
  D)
          None of the above
  done clear
  View Answer play_arrow

• question_answer201) Plasmodesmata connections help in
  A)
   cytoplasmic streaming
  done clear
  B)
   synchronous mitotic divisions
  done clear
  C)
   locomotion of unicellular organisms
  done clear
  D)
   movement of substances between cells
  done clear
  View Answer play_arrow

• question_answer202) The quiescent centre in root meristem serves as
  A)
   site for storage of food, which is utilized during maturation
  done clear
  B)
   reservoir of growth hormones
  done clear
  C)
   reserve for replenishment of damaged cells of the meristem
  done clear
  D)
   region for absorption of water
  done clear
  View Answer play_arrow

• question_answer203) Azolla is used as a biofertilizer because it
  A)
   multiplies very fast to produce massive biomass
  done clear
  B)
   has association of nitrogen-fixing Rhizobium
  done clear
  C)
   has association of nitrogen-fixing cyanobacteria
  done clear
  D)
   has association of mycorrhiza
  done clear
  View Answer play_arrow

• question_answer204) A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed
  A)
   on the blind spot 
  done clear
  B)
          behind the retina
  done clear
  C)
   in front of the retina
  done clear
  D)
   on the yellow spot
  done clear
  View Answer play_arrow

• question_answer205) Which one of the following codon codes for the same information as UGC?
  A)
   UGU                                    
  done clear
  B)
   UGA
  done clear
  C)
   UAG                                    
  done clear
  D)
   UGG
  done clear
  View Answer play_arrow

• question_answer206) People recovering from long illness are often advised to include the alga Spirulina in their diet because it
  A)
   makes the food easy to digest
  done clear
  B)
   is rich in proteins
  done clear
  C)
   has antibiotic properties
  done clear
  D)
   restores the intestinal microflora
  done clear
  View Answer play_arrow

• question_answer207) The phase of menstrual cycle in humans that lasts for 7-8 days is
  A)
   follicular phase                
  done clear
  B)
   ovulatory phase
  done clear
  C)
   luteal phase      
  done clear
  D)
          menstruation
  done clear
  View Answer play_arrow

• question_answer208) Restriction enzymes
  A)
   are endonucleases, which cleave DNA at specific sites
  done clear
  B)
   make DNA complementary to an existing DNA or RNA
  done clear
  C)
               cut or join DNA fragments            
  done clear
  D)
   are required in vector less direct gene  transfer
  done clear
  View Answer play_arrow

• question_answer209) Excessive stimulation of vagus nerve in humans may lead to
  A)
   hoarse voice
  done clear
  B)
   peptic ulcers
  done clear
  C)
   efficient digestion of proteins
  done clear
  D)
   irregular contraction of diaphragm
  done clear
  View Answer play_arrow

• question_answer210) An example of competitive inhibition of an enzyme is the inhibition of
  A)
   succinic dehydrogenase by malonic acid
  done clear
  B)
   cytochrome oxidase by cyanide
  done clear
  C)
   hexokinase by glucose-6-phosphate
  done clear
  D)
   carbonic anhydrase by carbon dioxide
  done clear
  View Answer play_arrow

• question_answer211) A person passes much urine and drinks much water but his blood glucose level is normal. This conditions may be the result of
  A)
   a reduction in insulin secretion from pancreas
  done clear
  B)
   a reduction in vasopressin secretion from posterior pituitary
  done clear
  C)
   a fall in the glucose concentration in urine
  done clear
  D)
   an increase in secretion of glucagon
  done clear
  View Answer play_arrow

• question_answer212) Biological Oxygen Demand (BOD) is a measure of
  A)
   industrial wastes poured into water bodies
  done clear
  B)
   extent to which water is polluted with organic compound
  done clear
  C)
   amount of carbon monoxide inseparably combined with haemoglobin
  done clear
  D)
   amount of oxygen needed by green plants during night
  done clear
  View Answer play_arrow

• question_answer213) Somaclonal variation is seen in
  A)
   tissue culture grown plants
  done clear
  B)
   apomicts
  done clear
  C)
   polyploids
  done clear
  D)
   vegetatiely propagated plants
  done clear
  View Answer play_arrow

• question_answer214) Among rust, smut and mushroom, all the three
  A)
   are pathogens                 
  done clear
  B)
   are saprobes
  done clear
  C)
   bear ascocarps  
  done clear
  D)
         bear basidiocarps
  done clear
  View Answer play_arrow

• question_answer215) In prokaryotes, chromatophores are
  A)
   specialized granules responsible for coloration of cells
  done clear
  B)
   structures responsible for organizing the shape of the organism
  done clear
  C)
   incusion bodies lying free inside the cells for carrying out various metabolic activities
  done clear
  D)
   internal membrane systems that may become  extensive  and  complex  in photosynthetic bacteria
  done clear
  View Answer play_arrow

• question_answer216) A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of
  A)
   stock                                   
  done clear
  B)
   scion
  done clear
  C)
   Both (a) and (b)
  done clear
  D)
          Neither (a) nor (b)
  done clear
  View Answer play_arrow

• question_answer217) The Montreal Protocol refers to
  A)
   persistent organic pollutants
  done clear
  B)
   global warming and climate change
  done clear
  C)
   substances that deplete the ozone layer
  done clear
  D)
   biosafety of genetically modified organisms
  done clear
  View Answer play_arrow

• question_answer218) Keystone species deserve protection because these
  A)
   are capable  of surviving  in  harsh environmental conditions
  done clear
  B)
   Indicate presence of certain minerals in the soil
  done clear
  C)
   have become rare due to over exploitation
  done clear
  D)
   play an important role in supporting other species
  done clear
  View Answer play_arrow

• question_answer219) Grafting is successful in dicots but not in monocots because the dicots have
  A)
   vascular bundles arranged in a ring
  done clear
  B)
   cambium for secondary growth
  done clear
  C)
   vessels with elements arranged end to end
  done clear
  D)
   cork cambium
  done clear
  View Answer play_arrow

• question_answer220) In the sieve elements, which one of the  following is the most likely function of P-proteins?
  A)
   Deposition of callose on sieve plates
  done clear
  B)
   Providing energy for active translocation
  done clear
  C)
   Autolyric enzymes
  done clear
  D)
   Sealing off mechanism on wounding
  done clear
  View Answer play_arrow

• question_answer221) A normal woman whose father was colurblind, is married to a normal man. The sons would be
  A)
   75% colourblind              
  done clear
  B)
   50% colourblind
  done clear
  C)
   all normal          
  done clear
  D)
          all colourblind
  done clear
  View Answer play_arrow

• question_answer222) Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle?
  A)
   Decondensation from chromosomes and reassembly of the nuclear lamina
  done clear
  B)
   Transcription from chromosome and reassembly of the nuclear lamina
  done clear
  C)
   Formation of the contractile ring and formation of the phragmoplast
  done clear
  D)
   Formation of the contractile ring and transcription from chromosomes
  done clear
  View Answer play_arrow

• question_answer223) The type of epithelial cells, which line the inner surface of Fallopian tubes, bronchioles and small bronchi, are known as
  A)
   squamous epithelium
  done clear
  B)
   columnar epithelium
  done clear
  C)
   ciliated epithelium
  done clear
  D)
   cubical epithelium
  done clear
  View Answer play_arrow

• question_answer224) Which one of the following pairs is correctly matched?
  A)
   Rhizobium          -Parasite in the roots of leguminous plants
  done clear
  B)
   Mycorrhizae      - Mineral uptake from soil
  done clear
  C)
   Yeast                    - Production of biogas
  done clear
  D)
   Myxomycetes - The disease ringworm
  done clear
  View Answer play_arrow

• question_answer225) A cricket player is fast chasing a ball in the field. Which one of the following groups of bones are directly contributing in this movement?
  A)
   Femur, malleus, tibia, metatarsals
  done clear
  B)
   Pelvis, ulna, patella, tarsals
  done clear
  C)
   Sternum, femur, tibia, fibula
  done clear
  D)
   Tarsals, femur, metatarsals, tibia
  done clear
  View Answer play_arrow

• question_answer226) Viruses that infect bacteria multiply and cause their lysis, are called
  A)
   lysozymes        
  done clear
  B)
   lipolytic
  done clear
  C)
   lyric                      
  done clear
  D)
          lysogenic
  done clear
  View Answer play_arrow

• question_answer227) Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
  A)
   storing them in underground storage tanks
  done clear
  B)
   using them for producing biogas
  done clear
  C)
   vermiculture
  done clear
  D)
   using them directly as bio-fertilizers
  done clear
  View Answer play_arrow

• question_answer228) Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous   for   a   character   under consideration is called
  A)
   reciprocal cross               
  done clear
  B)
   test cross
  done clear
  C)
   dihybrid cross                  
  done clear
  D)
   back cross
  done clear
  View Answer play_arrow

• question_answer229) Which one of the following pairs of features is a good example of polygenic inheritance?
  A)
   Human height and skin colour
  done clear
  B)
   ABO blood group in humans and flower colour of Mirabilis jalapa
  done clear
  C)
   Hair pigment of mouse and tongue rolling in humans
  done clear
  D)
   Human eye colour and sickle cell anaemia
  done clear
  View Answer play_arrow

• question_answer230) A lizard-like member of Reptilia is string on a tree with its tail coiled around a twig. This animal could be
  A)
   Hemidactylus showing sexual dimorphism
  done clear
  B)
   Varanus showing mimicry
  done clear
  C)
   Calotes (garden lizard) showing camouflage
  done clear
  D)
   Chamaeleon showing protective colouration
  done clear
  View Answer play_arrow

• question_answer231) All mammals without any exception are characterised by
  A)
   vivipariry and biconcave red blood cells extra
  done clear
  B)
   abdominal tests and a four-chambered heart
  done clear
  C)
   heterodont teeth and 12 pairs of cranial nerves
  done clear
  D)
   a muscular diaphragm and milk producing glands
  done clear
  View Answer play_arrow

• question_answer232) During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
  A)
   First negative, then positive and again back to negative
  done clear
  B)
   First positive, then negative and continue to be negative
  done clear
  C)
   First negative, then positive and continue to be positive
  done clear
  D)
   First positive, then negative and again back to positive
  done clear
  View Answer play_arrow

• question_answer233) If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
  A)
   Types of pigments present in the cell
  done clear
  B)
   Nature of stored food materials in the cell
  done clear
  C)
   Structure organization of thallus
  done clear
  D)
   Chemical composition of the cell wall
  done clear
  View Answer play_arrow

• question_answer234) A plant require magnesium (Mg) for
  A)
   holding cells together
  done clear
  B)
   protein synthesis
  done clear
  C)
   chlorophyll synthesis
  done clear
  D)
   cell wall development
  done clear
  View Answer play_arrow

• question_answer235) Ultrasound of how much frequency is beamed into human body for sonography?
  A)
   30 to 45 MHz   
  done clear
  B)
   15 to 30 MHz
  done clear
  C)
   1 to 5 MHz         
  done clear
  D)
          45 to 70 MHz
  done clear
  View Answer play_arrow

• question_answer236) Which one of the following pairs of structures distinguished a nerve cell from other types of cell?
  A)
   Perikaryon and dendrites
  done clear
  B)
   Vacuoles and fibres
  done clear
  C)
   Flagellum and medullary sheath
  done clear
  D)
   Nucleus and mitochondria
  done clear
  View Answer play_arrow

• question_answer237) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
  A)
   lactate dehydrogenase
  done clear
  B)
   isocitrate dehydrogenase
  done clear
  C)
   malate dehydrogenase
  done clear
  D)
   succinate dehydrogenase
  done clear
  View Answer play_arrow

• question_answer238) When two species of different genealogy come to resemble each other as a result of adaptation the phenomenon is termed as
  A)
   divergent evolution
  done clear
  B)
   microevolution
  done clear
  C)
   co-evolution
  done clear
  D)
   convergent evolution
  done clear
  View Answer play_arrow

• question_answer239) Which one of the following is a matching pair of a body feature and the animal possessing it?
  A)
   Post-anal tail                                     - Octopus
  done clear
  B)
   Ventral central nervous               - Leech system
  done clear
  C)
   Pharyngeal gills slits absent        - Chamaeleon m embryo
  done clear
  D)
   Ventral heart                                    - Scorpion
  done clear
  View Answer play_arrow

• question_answer240) Bowmans glands are located in the
  A)
   proximal end of uriniferous tubules
  done clear
  B)
   anterior pituitary
  done clear
  C)
   female reproductive system of cockroach
  done clear
  D)
   olfactory epithelium of our nose
  done clear
  View Answer play_arrow

• question_answer241) Which one of the following pairs, is not correctly matched?
  A)
   Abscisic acid                                      - Stomatal closure
  done clear
  B)
   Gibberellic acid                                - Leaf fall
  done clear
  C)
   Cytokinin                                            - Cell division
  done clear
  D)
   IAA                                        - Cell wall elongation
  done clear
  View Answer play_arrow

• question_answer242) Which one of the following element is not an essential micronutrient for plant growth?
  A)
   Manganese                      
  done clear
  B)
   Zinc      
  done clear
  C)
   Copper               
  done clear
  D)
          Calcium
  done clear
  View Answer play_arrow

• question_answer243) Two cells A and B are contiguous. Cell A has osmotic pressure 10 at m, turgor pressure-7 at m and diffusion pressure deficit 3 at m. Cell B has osmotic pressure 8 at m, turgor pressure 3 at m and diffusion pressure deficit 5 atm. The result will be
  A)
   movement of water from cell B to A
  done clear
  B)
   no movement of water
  done clear
  C)
   equilibrium between the two
  done clear
  D)
   movement of water from cell A to B
  done clear
  View Answer play_arrow

• question_answer244) Which one of the following is surrounded by a callose wall?
  A)
   Microspore mother cell
  done clear
  B)
   Male gemete
  done clear
  C)
   Egg
  done clear
  D)
   Pollen grain
  done clear
  View Answer play_arrow

• question_answer245) Male gametes in angiosperms are formed by the division of
  A)
   microspore
  done clear
  B)
   generative cell
  done clear
  C)
   vegetative cell
  done clear
  D)
   microspore mother cell
  done clear
  View Answer play_arrow

• question_answer246) Which one of the following is not a bioindicator of water pollution?
  A)
   Sludge-worm                   
  done clear
  B)
   Blood-worm
  done clear
  C)
   Stone fly            
  done clear
  D)
          Sewage fungus
  done clear
  View Answer play_arrow

• question_answer247) Differentiation of organs and tissues in a developing organism, is associated with
  A)
   development mutations
  done clear
  B)
   differential expression of genes
  done clear
  C)
   lethal mutations
  done clear
  D)
   deletion of genes
  done clear
  View Answer play_arrow

• question_answer248) Industrial melanism as observed in peppered moth proves that
  A)
   the true black melanic form arise by a recurring random mutation
  done clear
  B)
   the melanic form of the moth has no selective advantage over lighter form in industrial area
  done clear
  C)
   the lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area
  done clear
  D)
   melanism is a pollution-generated feature
  done clear
  View Answer play_arrow

• question_answer249) A genetically engineered microorganism used successfully in bioremediation of oil spills is a species of
  A)
   Pseudomonas                 
  done clear
  B)
   Trichoderma
  done clear
  C)
   Xanthomonas    
  done clear
  D)
          Bacillus
  done clear
  View Answer play_arrow

• question_answer250) About 96 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen,
  A)
   phosphorus and sulphur
  done clear
  B)
   sulphur and magnesium
  done clear
  C)
   magnesium and sodium
  done clear
  D)
   calcium and phosphorus
  done clear
  View Answer play_arrow

• question_answer251) Which one of the following pairs is mismatched?
  A)
   Pila globosa      - Pearl
  done clear
  B)
   Apis indica         - Honey
  done clear
  C)
   Kenia lacca        - Lac
  done clear
  D)
   Bombyx mori    - Silk
  done clear
  View Answer play_arrow

• question_answer252) In which one of the following preparations, are you likely to come across cell junctions most frequently?
  A)
   Ciliated epithelium
  done clear
  B)
   Thrombocytes
  done clear
  C)
   Tendon
  done clear
  D)
   Hyaline cartilage
  done clear
  View Answer play_arrow

• question_answer253) A person who is on a long hunger strike and is surviving only on water, will have
  A)
   more sodium in his urine
  done clear
  B)
   less amino acids in his urine
  done clear
  C)
   more glucose in his blood
  done clear
  D)
   less urea in his urine
  done clear
  View Answer play_arrow

• question_answer254) Which pair of the following belongs to Basidiomycetes?
  A)
   Birds nest fungi and puff balls
  done clear
  B)
   Puffballs and Claviceps
  done clear
  C)
   Peziza and stink horns
  done clear
  D)
   Morchella and mushrooms
  done clear
  View Answer play_arrow

• question_answer255) Spore dissemination in some liverworts is aided by
  A)
   elaters                                
  done clear
  B)
   indusium
  done clear
  C)
   calyptra              
  done clear
  D)
          peristome teeth
  done clear
  View Answer play_arrow

• question_answer256) Which one of the following human activities would cause least damage to the ecosystem?
  A)
   Organic farming
  done clear
  B)
   Shirting agriculture
  done clear
  C)
   Urban expansion
  done clear
  D)
   Cultivation of gentically engineered plants
  done clear
  View Answer play_arrow

• question_answer257) The Okazaki fragments in DNA chain growth
  A)
   result in transcription
  done clear
  B)
   polymerize in the 3 to 5 direction and forms replication fork
  done clear
  C)
   prove semi-conservative nature of DNA replication
  done clear
  D)
   polymerize in the 5 to 3 direction and explain 3 to 5 DNA replication
  done clear
  View Answer play_arrow

• question_answer258) Opening of floral buds into flowers is a type of
  A)
   autonomic movement of locomotion
  done clear
  B)
   autonomic movement of variation
  done clear
  C)
   paratonic movement of growth
  done clear
  D)
   autonomic movement of growth
  done clear
  View Answer play_arrow

• question_answer259) One gene-one enzyme relationship was established for the first time in
  A)
   Neurospora crassa
  done clear
  B)
   Salmonella typhimurium
  done clear
  C)
   Escherichia coli
  done clear
  D)
   Diplococcus pneumonia
  done clear
  View Answer play_arrow

• question_answer260) One of the important consequences of geographical isolation is
  A)
   no change in the isolated fauna
  done clear
  B)
   preventing speciation
  done clear
  C)
   speciation through reproductive isolation
  done clear
  D)
   random creation of new species
  done clear
  View Answer play_arrow

• question_answer261) The first acceptor of electrons from an excited chlorophyll molecule of photosystem-II is
  A)
   cytochrome                      
  done clear
  B)
   iron-sulphur protein
  done clear
  C)
   ferredoxin       
  done clear
  D)
   quinine
  done clear
  View Answer play_arrow

• question_answer262) Which of the following ecosystem type has the highest annual net primary productivity?
  A)
   Tropical rainforest
  done clear
  B)
   Tropical deciduous forest
  done clear
  C)
   Temperate evergreen forest
  done clear
  D)
   Temperate deciduous forest
  done clear
  View Answer play_arrow

• question_answer263) Lysozyme that is present in perspiration, saliva and tears, destroys
  A)
   certain fungi
  done clear
  B)
   certain types of bacteria
  done clear
  C)
   all viruses
  done clear
  D)
   most virus-infected cells
  done clear
  View Answer play_arrow

• question_answer264) Inheritance of skin colour in humans is an example of
  A)
   chromosomal aberration
  done clear
  B)
   point mutation
  done clear
  C)
   polygenic inheritance
  done clear
  D)
   codominance
  done clear
  View Answer play_arrow

• question_answer265) In the leaves of \[{{C}_{4}}\]-plants, malic acid formation during \[C{{O}_{2}}\] fixation occurs in the cells of
  A)
   mesophyll                         
  done clear
  B)
   bundle sheath
  done clear
  C)
   phloem              
  done clear
  D)
          epidermis
  done clear
  View Answer play_arrow

• question_answer266) Which of the following is a slime mould?
  A)
   Rhizopus                            
  done clear
  B)
   Physarum
  done clear
  C)
   Thiobadllus       
  done clear
  D)
          Anabaena
  done clear
  View Answer play_arrow

• question_answer267) Which one of the following is not a constituent of cell membrane?
  A)
   Cholesterol      
  done clear
  B)
   Glycolipids
  done clear
  C)
   Proline                                
  done clear
  D)
   Phospholipids
  done clear
  View Answer play_arrow

• question_answer268) The concept of chemical evolution is based on
  A)
   crystallization of chemicals
  done clear
  B)
   interaction of water, air and clay under intense heat
  done clear
  C)
   effect of solar radiation on chemicals
  done clear
  D)
   possible origin of life by combination of chemicals under suitable environmental conditions
  done clear
  View Answer play_arrow

• question_answer269) Which part of ovary in mammals acts as an endocrine gland after ovulation?
  A)
   Graafian follicle
  done clear
  B)
   Stroma
  done clear
  C)
   Germinal epithelium
  done clear
  D)
   Vitelline membrane
  done clear
  View Answer play_arrow

• question_answer270) If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
  A)
   Serum albumins
  done clear
  B)
   Serum globulins
  done clear
  C)
   Fibrinogen in the plasma
  done clear
  D)
   Haemocytes
  done clear
  View Answer play_arrow

• question_answer271) In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result
  A)
   there is no change in success rate of fertilization
  done clear
  B)
   there is high degree of sterility
  done clear
  C)
   one can conclude that the plant is apomictic
  done clear
  D)
   Self-fertilization is prevented
  done clear
  View Answer play_arrow

• question_answer272) In gymnosperms, the pollen chamber represents
  A)
   a cell in the pollen grain in which the sperms are formed
  done clear
  B)
   a cavity in the ovule in which pollen grains are stored after pollination
  done clear
  C)
   an opening in the megagametophyte through which the pollen tube approaches the egg
  done clear
  D)
   the microsporangium in which pollen grains develop
  done clear
  View Answer play_arrow

• question_answer273) One of endangered species of Indian medicinal plants is that of
  A)
   Podophyllum                   
  done clear
  B)
   Ocimum
  done clear
  C)
   Garlic                   
  done clear
  D)
          Nepenthes
  done clear
  View Answer play_arrow

• question_answer274) In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
  A)
   n = 7 and x = 21                               
  done clear
  B)
   n = 21 and x = 21
  done clear
  C)
   n = 21 and x = 14
  done clear
  D)
         n = 21 and x = 7
  done clear
  View Answer play_arrow

• question_answer275) Which one of the following is a viral disease of poultry?
  A)
   Salmonellosis                   
  done clear
  B)
   Coryza
  done clear
  C)
   New castle disease
  done clear
  D)
   Pasteurellosis
  done clear
  View Answer play_arrow

• question_answer276) During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
  A)
   TTAA                                   
  done clear
  B)
   AATT
  done clear
  C)
   CACC                   
  done clear
  D)
          TATA
  done clear
  View Answer play_arrow

• question_answer277) In maize, hybrid vigour is exploited by
  A)
   bombarding the seeds with DNA
  done clear
  B)
   crossing of two inbred parental lines
  done clear
  C)
   harvesting seeds from the most productive plants
  done clear
  D)
   inducing mutations
  done clear
  View Answer play_arrow

• question_answer278) What is true about Nereis, scorpion, cockroach and silver fish?
  A)
   They all have jointed paired appendages
  done clear
  B)
   They all possess dorsal heart
  done clear
  C)
   None of them is aquatic
  done clear
  D)
   They all belong to the same phylum
  done clear
  View Answer play_arrow

• question_answer279) Ergot of rye is caused by a species of
  A)
   Phycophthora                 
  done clear
  B)
   Uncinula
  done clear
  C)
   Ustilago             
  done clear
  D)
          Claviceps
  done clear
  View Answer play_arrow

• question_answer280) Among the human ancestors, the brain size was more than 1000 cc in
  A)
   Homo neanderthalensis
  done clear
  B)
   Homo erectus
  done clear
  C)
   Ramapichecus
  done clear
  D)
   Homo habilis
  done clear
  View Answer play_arrow

• question_answer281) The wavelength of light absorbed by \[{{P}_{r}}\] form of phytochrome is
  A)
   640 nm                               
  done clear
  B)
   680 nm
  done clear
  C)
   720 nm               
  done clear
  D)
          620 nm
  done clear
  View Answer play_arrow

• question_answer282) A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
  A)
   Parathyroid      
  done clear
  B)
   Parotid
  done clear
  C)
   Pancreas            
  done clear
  D)
          Thyroid
  done clear
  View Answer play_arrow

• question_answer283) Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?
  A)
   Euphorbia                         
  done clear
  B)
   Beetroot
  done clear
  C)
   Sugarcane         
  done clear
  D)
          Pongamia
  done clear
  View Answer play_arrow

• question_answer284) Foolish seedling disease of rice led to the discovery of
  A)
   GA                                        
  done clear
  B)
   ABA
  done clear
  C)
   2, 4-D                  
  done clear
  D)
          IAA
  done clear
  View Answer play_arrow

• question_answer285) Consider the following four statements (I-IV) about certain desert animals such as kangaroo rat.

  I. They have dark colour high rate of reproduction and excrete solid urine.

  II. They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.

  III. They feed on dry seeds and do not require drinking water.

  IV. They excrete very concentrated urine and do not use water to regulate body temperature

  Which two of the above statements for such animals are true?
  A)
   III and IV            
  done clear
  B)
   II and III
  done clear
  C)
   III and I               
  done clear
  D)
          I and II
  done clear
  View Answer play_arrow

• question_answer286) In DNA molecule
  A)
   the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
  done clear
  B)
   there are two strands, which run parallel in the \[5\to 3\] direction
  done clear
  C)
   the proportion of adenine in relation to thymine varies with the organism
  done clear
  D)
   there are two strands, which  run antiparallel-one in \[5\to 3\] direction and other in \[3\to 5\]
  done clear
  View Answer play_arrow

• question_answer287) Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
  A)
   They were able to reproduce
  done clear
  B)
   They could separate combinations of molecules from the surroundings
  done clear
  C)
   They were partially isolated from the surroundings
  done clear
  D)
   They   could   maintain   an   internal environment
  done clear
  View Answer play_arrow

• question_answer288) Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
  A)
   Thorns of-Analogous organs Bougainvillea and tendrils of Cucurbita
  done clear
  B)
   Nictitating-Vestigial organs membrane and blind spot in human eye
  done clear
  C)
   Nephridia of- Excretory organs earthworm and Malpighian tubules of cockroach
  done clear
  D)
   Wings of honey bee-Homologous organs and wings of crow
  done clear
  View Answer play_arrow

• question_answer289) Which one of the following phyla is correctly matched with its two general characteristics?
  A)
   Arthropoda-Body divided into head, thorax and abdomen and respiration by tracheae
  done clear
  B)
   Chordata-Notochord at some stage and separate anal and urinary openings to the outside
  done clear
  C)
   Echinoder-Pentamerous radial mata symmetry and mostly internal fertilization
  done clear
  D)
   Mollusca   - Normally oviparous and development through a trochophore or veliger larva
  done clear
  View Answer play_arrow

• question_answer290) Wobble nypothesis was given by
  A)
   FHC Crick
  done clear
  B)
                                          Nirenberg
  done clear
  C)
   Holley                 
  done clear
  D)
          Khurana
  done clear
  View Answer play_arrow

• question_answer291) Ascaris is characterized by
  A)
   absence of true coelom but presence of metamerism
  done clear
  B)
   presence of neither true coelom nor metamerism
  done clear
  C)
   presence of true coelom but absence of metamerism
  done clear
  D)
   presence of true coelom and metamerism (metamerisation)
  done clear
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• question_answer292) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this.

  I. Lots of urea and phosphate fertilizer were used in the crops in the vicinity.

  II. The area was sprayed with DDT by an aircraft.

  III. The lake water turned green and stinky.

  IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.

  Which two of the above were the main causes of fish mortality in the lake?
  A)
   II, III                     
  done clear
  B)
   III, IV
  done clear
  C)
   I, III                      
  done clear
  D)
          I, II
  done clear
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• question_answer293) Trichoderma harzianum has proved a useful microorganism for
  A)
   bioremediation of contaminated soils
  done clear
  B)
   reclamation of wastelands
  done clear
  C)
   gene transfer in higher plants
  done clear
  D)
   biological control of soil-borne plant pathogens
  done clear
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• question_answer294) Quercus species are the dominant component in
  A)
   temperate deciduous forests
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  B)
   alpine forests
  done clear
  C)
   scrub forests
  done clear
  D)
   tropical rain forests
  done clear
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• question_answer295) A transgenic food crop, which may help in solving the problem of night blindness in developing countries is
  A)
   Flavr savr tomatoes
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  B)
   Starlink maize
  done clear
  C)
   Bt soybean
  done clear
  D)
   golden rice
  done clear
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• question_answer296) Which one of the following pairs of plants structures has haploid number of chromosomes?
  A)
   Megaspore mother cell and antipodal cells
  done clear
  B)
   Egg cell and antipodal cells
  done clear
  C)
   Nucellus and antipodal cells
  done clear
  D)
   Egg nucleus and secondary nucleus
  done clear
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• question_answer297) Gel electrophoresis is used for
  A)
   cutting of DNA into fragments
  done clear
  B)
   separation of DNA fragments according to their size
  done clear
  C)
   construction of recornbinant DNA by joining with cloning vectors
  done clear
  D)
   isolation of DNA molecule
  done clear
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• question_answer298) Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
  A)
   vessels and tracheid differentiation
  done clear
  B)
   leaf abscission
  done clear
  C)
   annual plants
  done clear
  D)
   floral parts
  done clear
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• question_answer299) What will happen if the secretion of parietal  cells of gastric gland is blocked with an inhibitor?
  A)
   Gastric juice will be deficient in chymosin
  done clear
  B)
   Gastric juice will be deficient in pepsinogen
  done clear
  C)
   In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
  done clear
  D)
   Enter kinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
  done clear
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• question_answer300) The length of different internodes in a culm of sugarcane is variable because of
  A)
   shoot apical meristem
  done clear
  B)
   position of axillary buds
  done clear
  C)
   size of leaf lamina at the node below each internode
  done clear
  D)
   intercalary meristem
  done clear
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