Solved papers for RAJASTHAN PMT Rajasthan - PMT Solved Paper-2007

done Rajasthan - PMT Solved Paper-2007 Total Questions - 300

• question_answer1) In refraction, light waves are bent on passing from one medium to the second medium, because in the second medium
  A)
   the frequency is different
  done clear
  B)
   the coefficient of elasticity is different
  done clear
  C)
   the speed is different
  done clear
  D)
   the amplitude is smaller
  done clear
  View Answer play_arrow

• question_answer2) An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that, the efficiency of engine is 60% If \[g=10\,m{{s}^{-2}}\] the power of this engine is
  A)
   3.3 kW                
  done clear
  B)
          0.33 kW
  done clear
  C)
   0.033 kW            
  done clear
  D)
          33 kW
  done clear
  View Answer play_arrow

• question_answer3) The angular amplitude of a simple pendulum is \[{{}_{0.}}\]The maximum-tension in its string will be
  A)
   \[\text{mg(1-}{{}_{0.}})\]                           
  done clear
  B)
   \[\text{mg}\,\text{(1+}{{}_{0.}})\]
  done clear
  C)
   \[\text{mg}\,\text{(1-}_{0}^{2})\]          
  done clear
  D)
          \[\text{mg}\,\text{(1+}_{0}^{2})\]
  done clear
  View Answer play_arrow

• question_answer4) During the melting of a slab of ice at 273 K at atmospheric pressure
  A)
   positive work is done by the ice-water system on the atmosphere
  done clear
  B)
   positive work is done on the ice-water system by the atmosphere
  done clear
  C)
   internal energy of ice-water system decreases
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer5) A solid sphere rolls down on two different inclined planes of same height, but of different inclinations. In both cases
  A)
   speed and time of descent will be same
  done clear
  B)
   speed will be same, but time of descent will be different
  done clear
  C)
   speed will be different, but time of descent will be same
  done clear
  D)
   speed and time of descent both are different
  done clear
  View Answer play_arrow

• question_answer6) For inelastic collision between two spherical rigid bodies
  A)
   the total kinetic energy is conserved
  done clear
  B)
   the linear momentum is not conserved
  done clear
  C)
   the total mechanical energy is not conserved
  done clear
  D)
   the linear momentum is conserved
  done clear
  View Answer play_arrow

• question_answer7) An object is kept on a smooth inclined plane of 1 in \[l.\] The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to incline is
  A)
   \[g\sqrt{{{l}^{2}}-1}\]                                   
  done clear
  B)
   \[g({{l}^{2}}-1)\]
  done clear
  C)
   \[\frac{g}{\sqrt{{{l}^{2}}-1}}\]   
  done clear
  D)
          \[\frac{g}{{{l}^{2}}-1}\]
  done clear
  View Answer play_arrow

• question_answer8) A point initially at rest moves along x-axis. Its acceleration varies with time as \[a=(6t+5)\,m/{{s}^{2}}\]. If it starts from origin, the distance covered in 2 s is
  A)
   20 m                                    
  done clear
  B)
   18 m
  done clear
  C)
   16 m
  done clear
  D)
                                          25 m
  done clear
  View Answer play_arrow

• question_answer9) A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is
  A)
   9 : 4                                      
  done clear
  B)
   2 : 3
  done clear
  C)
   3 : 2                      
  done clear
  D)
          4 : 9
  done clear
  View Answer play_arrow

• question_answer10) Which of the following expressions is that of a simple harmonic progressive wave?
  A)
   \[a\,\sin \,\omega t\]                                  
  done clear
  B)
   \[a\,\sin \,(\omega t)\,\cos \,kx\]
  done clear
  C)
   \[a\,\sin \,(\omega t-kx)\,\]     
  done clear
  D)
   \[a\cos kx\]
  done clear
  View Answer play_arrow

• question_answer11) If \[E=\] energy, \[G=\] gravitational constant, \[I=\] impulse and \[M=\]mass, then dimensions of \[{{\frac{G\operatorname{I}M}{{{E}^{2}}}}^{2}}\]are same as that of
  A)
   time                                     
  done clear
  B)
   mass
  done clear
  C)
   length                 
  done clear
  D)
          force
  done clear
  View Answer play_arrow

• question_answer12) At what speed, the velocity head of water is equal to pressure head of 40 cm of Hg?
  A)
   10.3 m/s                             
  done clear
  B)
   2.8 m/s
  done clear
  C)
   5.6 m/s               
  done clear
  D)
          8.4 m/s
  done clear
  View Answer play_arrow

• question_answer13) An electric fan is switched on in a closed room. The air in the room is
  A)
   cooled
  done clear
  B)
   heated
  done clear
  C)
   maintains its temperature
  done clear
  D)
   heated or cooled depending on the atmospheric pressure
  done clear
  View Answer play_arrow

• question_answer14) If the electric flux entering and leaving an enclosed surface respectively are \[{{\phi }_{1}}\] and \[{{\phi }_{2,}}\] the electric charge inside the surface will be
  A)
   \[\frac{{{\phi }_{2}}-{{\phi }_{1}}}{{{\varepsilon }_{0}}}\]                             
  done clear
  B)
   \[\frac{{{\phi }_{2}}+{{\phi }_{1}}}{{{\varepsilon }_{0}}}\]
  done clear
  C)
   \[\frac{{{\phi }_{1}}-{{\phi }_{2}}}{{{\varepsilon }_{0}}}\]             
  done clear
  D)
          \[{{\varepsilon }_{0}}({{\phi }_{1}}+{{\phi }_{2}})\]
  done clear
  View Answer play_arrow

• question_answer15) In the propagation of light waves, the angle between the direction of vibration and plane of polarization is
  A)
  \[0{}^\circ \]                                      
  done clear
  B)
  \[90{}^\circ \]
  done clear
  C)
  \[45{}^\circ \]                   
  done clear
  D)
         \[80{}^\circ \]
  done clear
  View Answer play_arrow

• question_answer16) How should people wearing spectacles work with a microscope?
  A)
   They should keep on wearing their spectacles
  done clear
  B)
   They should take off their spectacles
  done clear
  C)
   They may keep on wearing or take off their spectacles, it makes no difference
  done clear
  D)
   They cannot use a microscope at all
  done clear
  View Answer play_arrow

• question_answer17) The root mean square and most probable speed of the molecules in a gas are
  A)
   same                   
  done clear
  B)
   different
  done clear
  C)
   cannot say
  done clear
  D)
   depends on nature of the gas
  done clear
  View Answer play_arrow

• question_answer18) When you make ice cubes, the entropy of water
  A)
   does not change            
  done clear
  B)
   increases
  done clear
  C)
   decreases
  done clear
  D)
   may either increase or decrease depending on the process used
  done clear
  View Answer play_arrow

• question_answer19) An electron and proton enter a magnetic Held perpendicularly. Both have same kinetic energy. Which of the following is true?
  A)
   Trajectory of electron is less curved
  done clear
  B)
   Trajectory of proton is less curved
  done clear
  C)
   Both trajectories are equally curved
  done clear
  D)
   Both move on straight line path
  done clear
  View Answer play_arrow

• question_answer20) In an L-R circuit, time constant is that time in which current grows from zero to the value where \[{{I}_{0}}\] is 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
  View Answer play_arrow

• question_answer21) The distance between two successive atomic planes of a calcite crystal is 0.3 nm. The minimum angle for Bragg scattering of \[0.3\,\overset{\text{o}}{\mathop{\text{A}}}\,\] X-rays will be
  A)
  \[1.43{}^\circ \]                                
  done clear
  B)
  \[1.56{}^\circ \]
  done clear
  C)
  \[2.86{}^\circ \]                
  done clear
  D)
         \[30{}^\circ \]
  done clear
  View Answer play_arrow

• question_answer22) A light emitting diode (I.ED) has a voltage drop of 2 V across it and passes a current of 10 n-I A. When it operates with a 6 V battery through a limiting resistor R, the value of R is
  A)
   40 \[k\,\Omega \]                          
  done clear
  B)
   \[4\,k\,\Omega \]
  done clear
  C)
   200 \[\,\Omega \]          
  done clear
  D)
          400 \[\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer23) The minimum potential difference between the base and emitter required to switch a silicon transistor ON is approximately?
  A)
   1 V                                        
  done clear
  B)
   3 V
  done clear
  C)
   5 V                        
  done clear
  D)
          4.2 V
  done clear
  View Answer play_arrow

• question_answer24) Two balloons are filled, one with pure He gas and the other by air, respectively. If the pressure and temperature of these balloons are same then the number of molecules per unit volume is
  A)
   more in the He filled balloon
  done clear
  B)
   same in both balloons
  done clear
  C)
   more in air filled balloon
  done clear
  D)
   in the ratio of 1 : 4
  done clear
  View Answer play_arrow

• question_answer25) A spaceman in training is rotated in a seat at the end of a horizontal arm of length 5 m- If he can with is and acceleration up to 9g. then what is the maximum number of revolutions per second permissible ? (Take g =10 m/s )
  A)
   13.5 rev/s                          
  done clear
  B)
   1.35 rev/s
  done clear
  C)
   0.675 rev/s                        
  done clear
  D)
   6.75 rev/s
  done clear
  View Answer play_arrow

• question_answer26) Two stones are projected with the same speed but making different angles with the horizontal. Their horizontal ranges are equal. The angle of projection of one is \[\frac{\pi }{3}\]and the maximum height reached by it is 102 m. Then the maximum height reached by the other in metre is
  A)
   336                                       
  done clear
  B)
   224
  done clear
  C)
   56                         
  done clear
  D)
          34
  done clear
  View Answer play_arrow

• question_answer27) A cosmonaut is orbiting earth in a spacecraft at an altitude h = 630 km with a speed of 8 km/s. If the radius of the earth is 6400 km, the acceleration of the cosmonaut is
  A)
   \[9.10\,m/{{s}^{2}}\]                                    
  done clear
  B)
   \[9.80\,m/{{s}^{2}}\]
  done clear
  C)
   \[10.0\,m/{{s}^{2}}\]   
  done clear
  D)
          \[9.88\,m/{{s}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer28) For two resistance wires joined in parallel, the resultant resistance is \[\frac{6}{5}\Omega .\] When one of the resistance wires breaks the effective resistance becomes \[2\,\Omega \] The resistance of the broken wire is
  A)
   \[\frac{3}{5}\,\Omega \]                                             
  done clear
  B)
   \[2\,\Omega \]  
  done clear
  C)
   \[\frac{6}{5}\,\Omega \]                             
  done clear
  D)
          \[3\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer29) When a p-n junction diode is reverse biased, then
  A)
   no current flows
  done clear
  B)
   the depletion region is increased
  done clear
  C)
   the depletion region is reduced
  done clear
  D)
   the height of the potential barrier is reduced
  done clear
  View Answer play_arrow

• question_answer30) The operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value
  A)
   1                                            
  done clear
  B)
   1.5
  done clear
  C)
   2.1                        
  done clear
  D)
          2.5
  done clear
  View Answer play_arrow

• question_answer31) Which one of the following is a possible nuclear reaction?
  A)
   \[_{5}^{10}B+_{2}^{4}He\xrightarrow{{}}_{7}^{13}N+_{1}^{1}H\]
  done clear
  B)
   \[_{11}^{23}Na+_{1}^{1}H\xrightarrow{{}}_{10}^{20}Ne+_{2}^{4}He\]
  done clear
  C)
   \[_{93}^{239}Np\xrightarrow{{}}_{94}^{239}Pu+\text{-+}\overset{-}{\mathop{v}}\,\]
  done clear
  D)
   \[_{7}^{11}N_{1}^{1}H\xrightarrow{{}}_{6}^{12}C+\,{{}^{-}}+v\]
  done clear
  View Answer play_arrow

• question_answer32) Given below is a circuit diagram of an AM demodulator. For good demodulation of AM signal of carrier frequency\[f,\]the value of RC should be
  A)
   \[RC=\frac{1}{f}\]                          
  done clear
  B)
   \[RC<\frac{1}{f}\]
  done clear
  C)
   \[RC\ge \frac{1}{f}\]                     
  done clear
  D)
          \[RC>>\frac{1}{f}\]
  done clear
  View Answer play_arrow

• question_answer33) The ionization energy of 10 times ionized sodium atom is
  A)
   \[\frac{13.6}{11}eV\]                    
  done clear
  B)
   \[\frac{13.6}{{{(11)}^{2}}}eV\]
  done clear
  C)
   \[13.6\times {{(11)}^{2}}eV\]                   
  done clear
  D)
   \[13.6\,eV\]
  done clear
  View Answer play_arrow

• question_answer34) \[n\,\text{-}\]particles per second are being emitted by N atoms of a radioactive element. The half-life of element will be
  A)
   \[\left( \frac{n}{N}s \right)\]                     
  done clear
  B)
   \[\left( \frac{N}{n} \right)s\]
  done clear
  C)
   \[\frac{0.693N}{n}s\]    
  done clear
  D)
          \[\frac{0.693n}{N}s\]
  done clear
  View Answer play_arrow

• question_answer35) Two circular discs A and B with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?
  A)
   A and B have .same specific heats
  done clear
  B)
   Specific heat of A is less
  done clear
  C)
   Specific heat of B is less
  done clear
  D)
   Nothing can be said
  done clear
  View Answer play_arrow

• question_answer36) During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio\[\frac{{{C}_{p}}}{{{C}_{V}}}\] for the gas is
  A)
   \[\frac{4}{3}\]                                  
  done clear
  B)
   \[2\]
  done clear
  C)
   \[\frac{3}{2}\]                  
  done clear
  D)
          \[\frac{3}{2}\]
  done clear
  View Answer play_arrow

• question_answer37) A microscope is of cussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark again in focus?
  A)
   2 cm upward                    
  done clear
  B)
   1 cm upward
  done clear
  C)
   45 cm downward           
  done clear
  D)
   1 cm downward
  done clear
  View Answer play_arrow

• question_answer38) The sum of two vectors \[\mathbf{\vec{A}}\] and \[\mathbf{\vec{B}}\] is at right angle to their difference. Then
  A)
   A = B
  done clear
  B)
   A = 2B
  done clear
  C)
   B = 2A
  done clear
  D)
    \[\mathbf{\vec{A}}\]and \[\mathbf{\vec{B}}\] have the same direction
  done clear
  View Answer play_arrow

• question_answer39) The height \[y\] and the distance \[x\] along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t) metre and x =- 6t metre where r is in seconds. The velocity of projection is
  A)
   8 m/s
  done clear
  B)
   6 m/s
  done clear
  C)
   10 m/s   
  done clear
  D)
   Not obtained from the data
  done clear
  View Answer play_arrow

• question_answer40) A ball is thrown up at an angle with the horizontal. Then the total change of momentum by the instant it returns to ground is
  A)
   acceleration due to gravity x total time of night
  done clear
  B)
   weight of the ball x half the time of flight
  done clear
  C)
   weight of the ball x total time of flight
  done clear
  D)
   weight of the ball x horizontal range
  done clear
  View Answer play_arrow

• question_answer41) When a spring is stretched by a distance x, it exerts a force, given by \[F=(5x-16{{x}^{3}})N\]The work done, when the spring is stretched from 0.1 m to 0.2 m is
  A)
   \[8.7\times {{10}^{-2}}\text{J}\]                              
  done clear
  B)
   \[12.2\times {{10}^{-2}}\text{J}\]
  done clear
  C)
   \[8.7\times {{10}^{-4}}\text{J}\]              
  done clear
  D)
          \[12.2\times {{10}^{-1}}\text{J}\]
  done clear
  View Answer play_arrow

• question_answer42) A hole is in the bottom of the tank having water. If total pressure at the bottom is 3 atm \[(1\,\text{atm=1}{{\text{0}}^{5}}\,N{{m}^{-2}}),\] then velocity of water flowing from hole is
  A)
   \[\sqrt{400}\,m{{s}^{-1}}\]                        
  done clear
  B)
   \[\sqrt{600}\,m{{s}^{-1}}\]
  done clear
  C)
   \[\sqrt{60}\,m{{s}^{-1}}\]           
  done clear
  D)
          None of these
  done clear
  View Answer play_arrow

• question_answer43) Time period of a simple pendulum of length (is \[{{T}_{1}}\]and time period of a uniform rod of the same length \[l\] pivoted about one end and oscillating in a vertical plane is \[{{T}_{2.}}\] Amplitude of oscillations in both the cases is small. Then \[\frac{{{T}_{1}}}{{{T}_{2}}}\] is
  A)
   \[\frac{1}{\sqrt{3}}\]                                    
  done clear
  B)
   \[1\]
  done clear
  C)
   \[\sqrt{\frac{4}{3}}\]                    
  done clear
  D)
          \[\sqrt{\frac{3}{2}}\]
  done clear
  View Answer play_arrow

• question_answer44) An insulator plate is passed between the plates of a capacitor. Then current
  A)
   first flows from A to Band then from B to A
  done clear
  B)
   first flows from B to A and then from A to B
  done clear
  C)
   always flows from B to A
  done clear
  D)
   always flows from A to B
  done clear
  View Answer play_arrow

• question_answer45) Two parallel large thin metal sheets have equal surface charge densities \[(\sigma =26.4\times {{10}^{-12}}\,c/{{m}^{2}})\] of opposite signs. The electric field between these sheets is
  A)
   \[\text{1}\text{.5}\,\text{N/C}\]                            
  done clear
  B)
   \[\text{1}\text{.5 }\!\!\times\!\!\text{ }\,\text{1}{{\text{0}}^{\text{-10}}}\,\text{N/C}\]
  done clear
  C)
   \[3\,\text{N/C}\]                           
  done clear
  D)
   \[\text{3 }\!\!\times\!\!\text{ }\,\text{1}{{\text{0}}^{\text{-10}}}\text{N/C}\]
  done clear
  View Answer play_arrow

• question_answer46) A circuit consists of five identical conductors as shown in figure. The two similar conductors are added as indicated by dotted lines. The ratio of resistances before and after addition will be
  A)
   \[\frac{7}{5}\]                                  
  done clear
  B)
   \[\frac{3}{5}\]
  done clear
  C)
   \[\frac{5}{3}\]                  
  done clear
  D)
          \[\frac{6}{5}\]
  done clear
  View Answer play_arrow

• question_answer47) The electric current passes through a metallic wire produces heat because of
  A)
   collisions of conduction electrons with each other
  done clear
  B)
   collisions of the atoms of the metal with each other
  done clear
  C)
   the energy released in the ionization of the atoms of the metal
  done clear
  D)
   collisions of the conduction electrons with the atoms of the metallic wire
  done clear
  View Answer play_arrow

• question_answer48) Two concentric circular coils of ten turns each are situated in the same plane. Their radii are 20 cm and 40 cm and they carry respectively 0.2A and 0.3A currents in opposite direction. The magnetic field in tesla at the centre is
  A)
   \[\text{35}{{}_{\text{0}}}\text{/4}\]                                      
  done clear
  B)
   \[{{}_{\text{0}}}\text{/80}\]
  done clear
  C)
   \[\text{7}{{}_{\text{0}}}\text{/80}\]                      
  done clear
  D)
          \[\text{5}{{}_{\text{0}}}\text{/4}\]
  done clear
  View Answer play_arrow

• question_answer49) Electromagnetic waves with frequencies greater than the critical frequency of ionosphere cannot be used for communication using sky wave propagation, because
  A)
   the refractive index of the ionosphere becomes very high for \[f>{{f}_{c}}\]
  done clear
  B)
   the refractive index of the ionosphere becomes very low for \[f>{{f}_{c}}\]
  done clear
  C)
   the refractive index of the ionosphere becomes very high for \[f<{{f}_{c}}\]
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer50) In a choke coil, the reactance\[{{X}_{L}}\]and resistance R are such that
  A)
   \[{{X}_{L}}=R\]                                
  done clear
  B)
   \[{{X}_{L}}>>R\]
  done clear
  C)
   \[{{X}_{L}}<<R\]             
  done clear
  D)
          \[{{X}_{L}}\infty \]
  done clear
  View Answer play_arrow

• question_answer51) If C and R denote capacity and resistance, the dimensions of CR are
  A)
   \[[{{M}^{0}}{{L}^{0}}T]\]
  done clear
  B)
   \[[M{{L}^{0}}T]\]
  done clear
  C)
   \[[{{M}^{0}}{{L}^{0}}{{T}^{2}}]\]
  done clear
  D)
   not expressible in terms of M, L and T
  done clear
  View Answer play_arrow

• question_answer52) An arrow is shot into air. Its range is 200 m and its time of flight is 5 s. If \[g=10\,m/{{s}^{2}},\] then the horizontal component of velocity of the arrow is
  A)
   12.5 m/s                             
  done clear
  B)
   25 m/s
  done clear
  C)
   31.25 m/s          
  done clear
  D)
          40 m/s
  done clear
  View Answer play_arrow

• question_answer53) A force of 49 N is just able to move a block of wood weighing 10 kg on a rough horizontal surface. Its coefficient of friction is
  A)
   \[1\]           
  done clear
  B)
                          0.7
  done clear
  C)
   0.5                        
  done clear
  D)
          zero
  done clear
  View Answer play_arrow

• question_answer54) Two bodies of masses m and 2m have equal kinetic energies. The ratio of their linear momenta is
  A)
   \[1\]                                                    
  done clear
  B)
   \[\frac{1}{2}\]   
  done clear
  C)
   \[\frac{1}{\sqrt{2}}\]                    
  done clear
  D)
          2
  done clear
  View Answer play_arrow

• question_answer55) A ball of mass m elastically collides with a wall with velocity v, the n change in its momentum is equal to
  A)
   2m                                        
  done clear
  B)
   2mv
  done clear
  C)
   8 mv                    
  done clear
  D)
          zero
  done clear
  View Answer play_arrow

• question_answer56) A solid sphere is rotating about a diameter at an angular velocity \[\omega .\] If it coots so that its radius reduces to \[\frac{1}{n}\] of its original value, its angular velocity becomes
  A)
  \[\frac{\omega }{n}\]                                    
  done clear
  B)
   \[\frac{\omega }{{{n}^{2}}}\]
  done clear
  C)
   \[n\omega \]                   
  done clear
  D)
          \[{{n}^{2}}\omega \]
  done clear
  View Answer play_arrow

• question_answer57) Two satellites A and B go around a planet P in circular orbits having radius 4R and R respectively. If the speed of satellite A is 3v, then the speed of satellite B will be
  A)
   6 v                                        
  done clear
  B)
   9 v
  done clear
  C)
   3 v                        
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer58) When a drop splits up into a number of drops, then
  A)
   area decreases               
  done clear
  B)
   volume increases
  done clear
  C)
   energy is absorbed       
  done clear
  D)
   energy is liberated
  done clear
  View Answer play_arrow

• question_answer59) A 5 m aluminium wire \[\text{(Y=7 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{10}}}\text{N/}{{\text{m}}^{\text{2}}}\text{)}\] of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire \[\text{(Y=12 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{10}}}\text{N/}{{\text{m}}^{\text{2}}}\text{)}\] of the same length under the same weight, the diameter should be in mm
  A)
   1.75      
  done clear
  B)
                          2.0
  done clear
  C)
   2.3                        
  done clear
  D)
          5.0
  done clear
  View Answer play_arrow

• question_answer60) At which of the following temperatures, the value of surface tension of water is minimum?
  A)
  \[4{}^\circ C\]                                   
  done clear
  B)
  \[25{}^\circ C\]
  done clear
  C)
  \[50{}^\circ C\]                 
  done clear
  D)
         \[75{}^\circ C\]
  done clear
  View Answer play_arrow

• question_answer61) In isochoric process
  A)
   \[\Delta W=0\]                                
  done clear
  B)
   \[\Delta U=0\]
  done clear
  C)
   \[\Delta Q=0\]                 
  done clear
  D)
          \[\Delta T=0\]
  done clear
  View Answer play_arrow

• question_answer62) If the temperature difference on the two sides of a wall increases from \[100{}^\circ C\] to \[200{}^\circ C\], its thermal conductivity
  A)
   remains unchanged
  done clear
  B)
   is doubled
  done clear
  C)
   is halved
  done clear
  D)
   becomes four times
  done clear
  View Answer play_arrow

• question_answer63) Let there be four articles having colors blue, red, black and white. When they are heated together and allowed to cool, which article will cool at the earliest?
  A)
   Blue                                     
  done clear
  B)
   Red
  done clear
  C)
   Black                    
  done clear
  D)
          White
  done clear
  View Answer play_arrow

• question_answer64) An ideal gas is taken through the cycle \[A\to B\to C\to A,\] as shown in figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process. \[C\to A\] is
  A)
   - 5 J                                      
  done clear
  B)
   - 10 J
  done clear
  C)
   -15 J                     
  done clear
  D)
          -20 J
  done clear
  View Answer play_arrow

• question_answer65) A piece of red glass when heated in dark to red hot state will appear to be
  A)
   white                                  
  done clear
  B)
   red
  done clear
  C)
   green                  
  done clear
  D)
          invisible
  done clear
  View Answer play_arrow

• question_answer66) The period of oscillation of a simple pendulum of constant length al surface of the earth is T. Its time period inside a mine will be
  A)
   cannot be compared
  done clear
  B)
   equal to T
  done clear
  C)
   less than T         
  done clear
  D)
          more than T
  done clear
  View Answer play_arrow

• question_answer67) A particle executing simple harmonic motion has a time period of 4s. After how much interval of time from t = 0 will its displacement be half of its amplitude ?
  A)
   \[\frac{1}{3}s\]                                
  done clear
  B)
   \[\frac{1}{2}s\]
  done clear
  C)
   \[\frac{2}{3}s\]                
  done clear
  D)
          \[\frac{1}{6}s\]
  done clear
  View Answer play_arrow

• question_answer68) A train approaches a stationary observer, the velocity of train being \[\frac{1}{20}\] of the velocity of sound. A sharp blast is blown with the whistle of the engine at equal intervals of a second. The interval between the successive blasts as heard by the observer is
  A)
   \[\frac{1}{20}s\]                                             
  done clear
  B)
   \[\frac{1}{20}\min \]
  done clear
  C)
   \[\frac{19}{20}s\]                           
  done clear
  D)
          \[\frac{19}{20}\min \]
  done clear
  View Answer play_arrow

• question_answer69) Which of the following equations represents a wave travelling along y-axis ?
  A)
   \[y=A\,\sin \,(kx-\omega t)\]
  done clear
  B)
   \[x=A\,\sin \,(ky-\omega t)\]
  done clear
  C)
   \[y=A\,\sin \,(ky\cos \omega t\]
  done clear
  D)
   \[y=A\,\,\cos ky\sin \omega t\]
  done clear
  View Answer play_arrow

• question_answer70)   The difference between soft and hard X-rays is of
  A)
   velocity                              
  done clear
  B)
   intensity
  done clear
  C)
   frequency         
  done clear
  D)
          polarization
  done clear
  View Answer play_arrow

• question_answer71) The capacity of an isolated conducting sphere of radius R is proportional to
  A)
   \[{{R}^{2}}\]                                     
  done clear
  B)
   \[\frac{1}{{{R}^{2}}}\]
  done clear
  C)
   \[\frac{1}{R}\]                 
  done clear
  D)
          \[R\]
  done clear
  View Answer play_arrow

• question_answer72) Two spheres of radii \[{{R}_{1}}\] and \[{{R}_{2}}\] respectively are charged and joined by a wire. The ratio of electric fields of spheres is
  A)
   \[\frac{R\,_{2}^{2}}{R_{1}^{2}}\]                            
  done clear
  B)
   \[\frac{R\,_{1}^{2}}{R_{2}^{2}}\]  
  done clear
  C)
   \[\frac{R{{\,}_{2}}}{{{R}_{1}}}\]                                
  done clear
  D)
          \[\frac{R{{\,}_{1}}}{{{R}_{2}}}\]
  done clear
  View Answer play_arrow

• question_answer73) If a positive charge is shifted from a low potential region to a high potential region, then electric potential energy
  A)
   decreases
  done clear
  B)
   increases
  done clear
  C)
   remains the same
  done clear
  D)
   may increase or decrease
  done clear
  View Answer play_arrow

• question_answer74) The equivalent resistance between A and B is
  A)
   \[10\,\Omega \]                             
  done clear
  B)
   \[20\,\Omega \]
  done clear
  C)
   \[30\,\Omega \]             
  done clear
  D)
          \[40\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer75) An electrical cable of copper has just one wire of radius 9 mm. Its resistance is \[5\,\Omega \] The single, wire of the cable is replaced by 6 different well insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to
  A)
   \[270\,\Omega \]                           
  done clear
  B)
   \[90\,\Omega \]
  done clear
  C)
   \[45\,\Omega \]             
  done clear
  D)
          \[7.5\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer76) A current of 2 A flowing through a conductor produces 80 Jot heat in 10s. The resistances of the conductor is
  A)
   \[0.5\,\Omega \]                            
  done clear
  B)
   \[2\,\Omega \]
  done clear
  C)
   \[4\,\Omega \]               
  done clear
  D)
          \[20\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer77) A thermoelectric refrigerator works on
  A)
   Joule effect                      
  done clear
  B)
   Seebeck effect
  done clear
  C)
   Peltier effect    
  done clear
  D)
          Thermionic effect
  done clear
  View Answer play_arrow

• question_answer78) A small circular flexible loop of wire of radius. \[r\] carries a current\[I.\]It is placed in a uniform magnetic field B. The tension in the loop will be doubled if
  A)
   \[I\] is halved
  done clear
  B)
   B is halved
  done clear
  C)
   r is doubled
  done clear
  D)
   both B and \[I\] are doubled
  done clear
  View Answer play_arrow

• question_answer79) Two parallel wires carrying currents in the same direction attract each other because of
  A)
   potential difference between them
  done clear
  B)
   mutual inductance between them
  done clear
  C)
   electric force between them
  done clear
  D)
   magnetic force between them
  done clear
  View Answer play_arrow

• question_answer80) A hydrogen atom is paramagnetic. A hydrogen molecule is
  A)
   diamagnetic    
  done clear
  B)
   paramagnetic
  done clear
  C)
   ferromagnetic   
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer81) A galvanometer has resistance of \[400\,\Omega \] am deflects full scale for current of 0.2mA through it. The shunt resistance required to convert into 3 A ammeter is
  A)
   \[0.027\,\Omega \]                                       
  done clear
  B)
   \[0.054\,\Omega \]
  done clear
  C)
   \[0.0135\,\Omega \]                     
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer82) the power factor of a series L-C-R circuit when at resonance is
  A)
   zero
  done clear
  B)
   0.5
  done clear
  C)
   1.0
  done clear
  D)
   depends on values of L, C and R
  done clear
  View Answer play_arrow

• question_answer83) For high frequency, capacitor offers
  A)
   more resistance             
  done clear
  B)
   less resistance
  done clear
  C)
   zero resistance  
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer84) In an oscillating L-C circuit, the maximum charge on the capacitor is Q. The charge on the capacitor, when the energy is stored equally between the electric and magnetic field is
  A)
   \[\frac{Q}{2}\]                                 
  done clear
  B)
   \[\frac{Q}{\sqrt{2}}\]
  done clear
  C)
   \[\frac{Q}{\sqrt{3}}\]                   
  done clear
  D)
          \[\frac{Q}{3}\]
  done clear
  View Answer play_arrow

• question_answer85) If\[{{v}_{g,}}\] \[{{v}_{x,}}\] and \[{{v}_{m,}}\] are the speeds of gamma rays, X-rays and microwaves respectively in vacuum then
  A)
   \[{{v}_{g,}}>{{v}_{m}}>{{v}_{x}}\]          
  done clear
  B)
   \[{{v}_{g}}>{{v}_{x}}>{{v}_{m}}\]
  done clear
  C)
   \[{{v}_{g}}={{v}_{x}}={{v}_{m}}\]            
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer86) A person standing in front of a mirror finds his image larger than himself. This implies that the mirror is
  A)
   convex                               
  done clear
  B)
   parabolic
  done clear
  C)
   plane                   
  done clear
  D)
          concave
  done clear
  View Answer play_arrow

• question_answer87) For a telescope, larger the diameter of the objective lens
  A)
   greater is the resolving power
  done clear
  B)
   smaller is the resolving power
  done clear
  C)
   greater is the magnifying power
  done clear
  D)
   smaller is the magnifying power
  done clear
  View Answer play_arrow

• question_answer88) If [he critical angle for total internal reflection from medium to vacuum is \[30{}^\circ \], the velocity of light in medium is
  A)
   \[3\times {{10}^{8}}\,m/s\]       
  done clear
  B)
   \[1.5\times {{10}^{8}}\,m/s\]
  done clear
  C)
   \[6\times {{10}^{8}}\,m/s\]       
  done clear
  D)
          \[\sqrt{3}\,\times {{10}^{8}}\,m/s\]
  done clear
  View Answer play_arrow

• question_answer89) The deviation is maximum for which colour?
  A)
   Violet                                  
  done clear
  B)
   Red
  done clear
  C)
   Blue                     
  done clear
  D)
          Green
  done clear
  View Answer play_arrow

• question_answer90) In single slit diffraction pattern
  A)
   central fringe has negligible width than others
  done clear
  B)
   all fringes are of same width
  done clear
  C)
   central fringe does not exist
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer91) The relation between amplification factor \[(\mu ),\] plate resistance \[({{r}_{p}})\]and mutual conductance \[({{g}_{m}})\]of a triode valve is given by
  A)
   \[\mu ={{r}_{p}}\times {{g}_{m}}\]                        
  done clear
  B)
   \[{{r}_{p}}=\mu \times {{g}_{m}}\]
  done clear
  C)
   \[{{g}_{m}}=\mu \times {{r}_{p}}\]        
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer92) A light of wavelength \[5000\overset{\text{o}}{\mathop{\text{A}}}\,\] falls on a sensitive plate with photoelectric work function 1.90 eV. Kinetic energy of the emitted photoelectrons will be (Given, \[(\text{Give}\,\text{n,}\,\text{h=6}\text{.62}\times \text{1}{{\text{0}}^{-34}}\text{J-s})\]
  A)
   0.1 eV                                 
  done clear
  B)
   2 eV
  done clear
  C)
   0 58 eV               
  done clear
  D)
          1.581 eV
  done clear
  View Answer play_arrow

• question_answer93) An electron with kinetic energy 5 eV is incident on an H-atom in its ground state. The collision
  A)
   must be elastic
  done clear
  B)
   may be partially elastic
  done clear
  C)
   may be completely elastic
  done clear
  D)
   may be completely inelastic
  done clear
  View Answer play_arrow

• question_answer94) The emission of electrons is possible by
  A)
   photoelectric effect
  done clear
  B)
   thermionic effect
  done clear
  C)
   both (a) and (b)
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer95) An electron and a proton are possessing same amount of kinetic energies. The de-Broglie wavelength is greater for
  A)
   electron                             
  done clear
  B)
   proton
  done clear
  C)
   both (a) and (b)
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer96) In a sample of radioactive -material, what percentage of the initial number of active nuclei will decay during one mean life?
  A)
   37%                                      
  done clear
  B)
   50%
  done clear
  C)
   63%                      
  done clear
  D)
          69.3%
  done clear
  View Answer play_arrow

• question_answer97) For the stability of any nucleus
  A)
   binding energy per nucleon will he more
  done clear
  B)
   binding energy per nucleon wilt be less
  done clear
  C)
   number of electrons will be more
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer98) If the half-life of any sample of radioactive substance is 4 days, then the fraction of sample will remain undecayed after 2 days, will be?
  A)
   \[\sqrt{2}\]                                       
  done clear
  B)
   \[\frac{1}{\sqrt{2}}\]  
  done clear
  C)
   \[\frac{\sqrt{2}-1}{\sqrt{2}}\]      
  done clear
  D)
          \[\frac{1}{2}\]
  done clear
  View Answer play_arrow

• question_answer99) A sensitive magnetic instrument can be shielded very effectively from outside fields by placing it inside a box of
  A)
   teak wood        
  done clear
  B)
          plastic material
  done clear
  C)
   soft iron of high permeability
  done clear
  D)
   a metal of high conductivity
  done clear
  View Answer play_arrow

• question_answer100) An n-type semiconductor is
  A)
   negatively charged        
  done clear
  B)
   positively charged
  done clear
  C)
   neutral               
  done clear
  D)
          None of the above
  done clear
  View Answer play_arrow

• question_answer101) The compound in which underlined carbon uses only its \[s{{p}^{3}}\] hybrid orbitals for bond formation is
  A)
  \[C{{H}_{3}}\underline{C}OOH\]                              
  done clear
  B)
         \[C{{H}_{3}}\underline{C}ON{{H}_{2}}\]               
  done clear
  C)
         \[C{{H}_{3}}\underline{C}{{H}_{2}}OH\]               
  done clear
  D)
         \[C{{H}_{3}}\underline{C}H=C{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer102) \[t-\]butyl alcohol is
  A)
  2-methyl-propan-2-ol
  done clear
  B)
         2-methyl-propan-1-ol
  done clear
  C)
         3-methyt-buian-1-ol
  done clear
  D)
         3-methyl-butan-2-ol
  done clear
  View Answer play_arrow

• question_answer103) Optical isomerism is shown by
  A)
  propanol-2         
  done clear
  B)
         butanol-2           
  done clear
  C)
         ethanol                               
  done clear
  D)
         methanol
  done clear
  View Answer play_arrow

• question_answer104) When\[{{C}_{2}}{{H}_{2}},\,\,C{{H}_{4}}\]and \[{{C}_{2}}{{H}_{4}}\] passes through a test tube which have ammoniacal \[C{{u}_{2}}C{{l}_{2}}\], find out which gas comes out unaffected from test tube?
  A)
  \[{{C}_{2}}{{H}_{2}}\]and\[C{{H}_{4}}\]
  done clear
  B)
         \[{{C}_{2}}{{H}_{2}}\]and\[{{C}_{2}}{{H}_{4}}\]
  done clear
  C)
         \[{{C}_{2}}{{H}_{4}}\]and\[C{{H}_{4}}\]
  done clear
  D)
         \[{{C}_{2}}{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer105) If a mixture of \[CO\] and \[{{N}_{3}}\] in equal amount have total \[1\,\,atm\] pressure, find out partial pressure of \[{{N}_{3}}\] in mixture
  A)
  \[1\,\,atm\]                       
  done clear
  B)
         \[0.50\,\,atm\]
  done clear
  C)
         \[2\,\,atm\]                       
  done clear
  D)
         \[3\,\,atm\]
  done clear
  View Answer play_arrow

• question_answer106) Which does not reacts with Fehling solution?
  A)
  \[C{{H}_{3}}CHO\]                          
  done clear
  B)
         \[{{C}_{6}}{{H}_{5}}CHO\]
  done clear
  C)
         \[C{{H}_{3}}COC{{H}_{3}}\]                        
  done clear
  D)
         Glucose
  done clear
  View Answer play_arrow

• question_answer107) When hydrogen molecules decomposed into its atoms which conditions gives maximum yields of \[H\] atoms?
  A)
  High temperature and low pressure
  done clear
  B)
         Low temperature and high pressure
  done clear
  C)
         High temperature and high pressure
  done clear
  D)
         Low temperature and low pressure
  done clear
  View Answer play_arrow

• question_answer108) Lithopone is
  A)
  \[ZnS{{O}_{4}}+PbS\]    
  done clear
  B)
         \[BaS{{O}_{4}}+ZnS\]
  done clear
  C)
         \[Pb{{O}_{2}}\]                
  done clear
  D)
         \[ZnS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer109) Natural rubber is a polymer of
  A)
   styrene
  done clear
  B)
          chloroprene
  done clear
  C)
         \[C{{H}_{2}}=\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}\]or isopropene
  done clear
  D)
         1, 3-butadiene
  done clear
  View Answer play_arrow

• question_answer110) \[PC{{l}_{3}}\] is possible but \[NC{{l}_{5}}\] does not exist
  A)
  in \[N,\,\,d-\]sub-shell is absent
  done clear
  B)
         ionization energy of \[N\] is very high
  done clear
  C)
         it does not like\[Cl\]
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer111) \[_{11}N{{a}^{23}}\] is formed from \[_{11}N{{a}^{24}}\] by the
  A)
  \[_{0}{{n}^{1}}\] emission
  done clear
  B)
         \[\beta -\]emission
  done clear
  C)
         \[K-\]electron capture
  done clear
  D)
         \[\alpha -\]emission
  done clear
  View Answer play_arrow

• question_answer112) Glucose reacts with excess of phenyl hydrazine and forms
  A)
   glucosazone
  done clear
  B)
         glucose phenyl hydrazine
  done clear
  C)
         glucose oxime
  done clear
  D)
         sorbitol
  done clear
  View Answer play_arrow

• question_answer113) Which is purified by steam distillation?
  A)
  Aniline                                 
  done clear
  B)
         Benzoic Acid
  done clear
  C)
         Petroleum         
  done clear
  D)
         Naphthalene
  done clear
  View Answer play_arrow

• question_answer114) Which compound is aromatic?
  A)
   
  done clear
  B)
        
  done clear
  C)
          
  done clear
  D)
        
  done clear
  View Answer play_arrow

• question_answer115) Which does not replace hydrogen from\[HCl\]?
  A)
  \[Cu\]                                  
  done clear
  B)
         \[Mg\]
  done clear
  C)
         \[Na\]                                  
  done clear
  D)
         \[Al\]
  done clear
  View Answer play_arrow

• question_answer116) For prevention of rusting to iron, paints of which is used?
  A)
  \[PbO\]                               
  done clear
  B)
         \[Pb{{O}_{2}}\]
  done clear
  C)
         \[P{{b}_{3}}{{O}_{4}}\]                 
  done clear
  D)
         \[PbS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer117) A violet colour compound is formed in detection of \[S\] in a compound
  A)
  \[N{{a}_{4}}[Fe{{(CN)}_{5}}NOS]\]
  done clear
  B)
         \[N{{a}_{3}}[Fe{{(CN)}_{5}}NOS]\]
  done clear
  C)
         \[N{{a}_{2}}[Fe{{(CN)}_{5}}NOS]\]
  done clear
  D)
         \[N{{a}_{2}}[Fe{{(CN)}_{5}}NO]\]
  done clear
  View Answer play_arrow

• question_answer118) Find out emf of cell, \[Zn;Z{{n}^{2+}}(1M)|\,|\,\,C{{u}^{2+}}(1M);\,\,Cu\,\,E{}^\circ \]for \[Z{{n}^{2+}}/Zn=-0.76;\,\,E{}^\circ for\,\,C{{u}^{2+}}/Cu=+0.34\]
  A)
  \[+1.10\,\,V\]                   
  done clear
  B)
         \[-1.10\,\,V\]
  done clear
  C)
         \[-0.76\]                              
  done clear
  D)
         \[-0.42\]
  done clear
  View Answer play_arrow

• question_answer119) Radius of \[Ga\] is less than \[Al\] because of
  A)
  lanthenoid contraction
  done clear
  B)
         greater screening effect
  done clear
  C)
         inert pair effect
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer120) Number of atoms of \[He\] in \[100\,\,amu\] of \[He\] (atomic\[\text{wt}\text{.}\] of\[He\] is 4) are
  A)
  \[25\]                                   
  done clear
  B)
         \[100\]
  done clear
  C)
         \[50\]                                   
  done clear
  D)
         \[100\times 6\times {{10}^{-23}}\]
  done clear
  View Answer play_arrow

• question_answer121) . Which inert gas show abnormal behaviour on liquidation?
  A)
  \[Xe\]                                  
  done clear
  B)
         \[He\]
  done clear
  C)
         \[Ar\]                                   
  done clear
  D)
         \[Kr\]
  done clear
  View Answer play_arrow

• question_answer122) Which has least gold number?
  A)
  Gelatin                                
  done clear
  B)
         Starch
  done clear
  C)
         Albumin                              
  done clear
  D)
         Blood
  done clear
  View Answer play_arrow

• question_answer123) In a compound \[C,\,\,H\] and \[N\] are present in \[9:13.5\] by weight. If molecular weight of the compound is\[108\], then the molecular formula on the compound is
  A)
  \[{{C}_{2}}{{H}_{6}}{{N}_{2}}\]                  
  done clear
  B)
         \[{{C}_{3}}{{H}_{4}}N\]
  done clear
  C)
         \[{{C}_{6}}{{H}_{8}}{{N}_{2}}\]                  
  done clear
  D)
         \[{{C}_{9}}{{H}_{12}}N\]
  done clear
  View Answer play_arrow

• question_answer124) In the following reaction,                 \[{{C}_{2}}{{H}_{2}}\xrightarrow[HgS{{O}_{4}}/{{H}_{2}}S{{O}_{4}}]{{{H}_{2}}O}XC{{H}_{3}}CHO\] What is\[X\]?
  A)
  \[C{{H}_{3}}C{{H}_{2}}OH\]                        
  done clear
  B)
         \[C{{H}_{3}}-O-C{{H}_{3}}\]
  done clear
  C)
         \[C{{H}_{3}}C{{H}_{2}}CHO\]     
  done clear
  D)
         \[C{{H}_{2}}=CHOH\]
  done clear
  View Answer play_arrow

• question_answer125) Which one of the following will most readily be dehydrated in acidic conditions?
  A)
  
  done clear
  B)
          
  done clear
  C)
          
  done clear
  D)
          
  done clear
  View Answer play_arrow

• question_answer126) Indane is
  A)
  commercial butane, isobutane and propane mixture
  done clear
  B)
         butane, ethane mixture
  done clear
  C)
         commercial propane
  done clear
  D)
         methane, propane mixture
  done clear
  View Answer play_arrow

• question_answer127) Which of the following is not Lewis acid?
  A)
  \[AlC{{l}_{3}}\cdot 6{{H}_{2}}O\]                             
  done clear
  B)
         \[AlC{{l}_{3}}\]
  done clear
  C)
         \[SnC{{l}_{4}}\]                
  done clear
  D)
         \[FeC{{l}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer128) Blue vitriol is
  A)
  \[MgS{{O}_{4}}\cdot 5{{H}_{2}}O\]         
  done clear
  B)
         \[CuS{{O}_{4}}\cdot 5{{H}_{2}}O\]
  done clear
  C)
         \[CaS{{O}_{4}}\cdot 5{{H}_{2}}O\]          
  done clear
  D)
         \[ZnS{{O}_{4}}\cdot 5{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer129) Bleaching action of\[CaOC{{l}_{2}}\]is due to
  A)
  nascent oxygen               
  done clear
  B)
         chlorine
  done clear
  C)
         \[HClO\]                              
  done clear
  D)
         \[HCl\]
  done clear
  View Answer play_arrow

• question_answer130) Which of the following is act as pickling agent?
  A)
  \[HN{{O}_{3}}\]                               
  done clear
  B)
         \[HCl\]
  done clear
  C)
         \[{{H}_{2}}S{{O}_{4}}\]                 
  done clear
  D)
         \[HN{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer131) In a closed insulated container, a liquid is stirred with a paddle to increase the temperature. Which of the following is true?
  A)
  \[\Delta E=W\ne 0,\,\,q=0\] 
  done clear
  B)
         \[\Delta E=W=q\ne 0\]
  done clear
  C)
         \[\Delta E=W=q\ne 0\]
  done clear
  D)
         \[W=0,\,\,\Delta E=q\ne 0\]
  done clear
  View Answer play_arrow

• question_answer132) The following data are for the decomposition of ammonium nitrite in aqueous solution

  Vol. of N2 in cc	Time (min.)
  6.25	10
  9.00	15
  11.40	20
  13.65	25
  35.65	\[\infty \]

  The order of reaction is
  A)
  zero                                      
  done clear
  B)
         one
  done clear
  C)
         two                                       
  done clear
  D)
         three
  done clear
  View Answer play_arrow

• question_answer133) In Arrhenius plot, intercepts is equal to
  A)
  \[\frac{-{{E}_{a}}}{R}\]                                  
  done clear
  B)
         \[\ln A\]
  done clear
  C)
         \[\ln k\]                                               
  done clear
  D)
         \[{{\log }_{10}}a\]
  done clear
  View Answer play_arrow

• question_answer134) The total number of possible isomeric trimethyl benzene is
  A)
  2                                             
  done clear
  B)
         3
  done clear
  C)
         4                                             
  done clear
  D)
         6
  done clear
  View Answer play_arrow

• question_answer135) An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide?
  A)
  Methyl iodide                   
  done clear
  B)
         Ethyl iodide
  done clear
  C)
         Ethyl bromide  
  done clear
  D)
         Propyl bromide
  done clear
  View Answer play_arrow

• question_answer136) The following reaction is known as
  A)
  Perkin reaction
  done clear
  B)
         Gattermann reaction
  done clear
  C)
         Kolbe reaction
  done clear
  D)
         Gattermann-aldehyde reaction
  done clear
  View Answer play_arrow

• question_answer137) Acetone on distillation with conc.\[{{H}_{2}}S{{O}_{4}}\]  forms
  A)
  phorone             
  done clear
  B)
         acrolein
  done clear
  C)
         mesitylene        
  done clear
  D)
         mesityl oxide
  done clear
  View Answer play_arrow

• question_answer138) On treatment with ninhydrin which of the following give blue colour?
  A)
  Proteins              
  done clear
  B)
         Peptides
  done clear
  C)
         \[\alpha -\]amino acids                
  done clear
  D)
         All of these
  done clear
  View Answer play_arrow

• question_answer139) Aldehyde with \[N{{H}_{2}}\cdot N{{H}_{2}}\] forms
  A)
  hydrazones       
  done clear
  B)
         aniline
  done clear
  C)
         nitrobenzene   
  done clear
  D)
         none of these
  done clear
  View Answer play_arrow

• question_answer140) Allyl isocyanide contains \[\sigma \] and \[\pi \] bonds
  A)
  \[9\sigma ,\,\,3\pi \]                      
  done clear
  B)
         \[9\sigma ,\,\,9\pi \]
  done clear
  C)
         \[3\sigma ,\,\,4\pi \]                      
  done clear
  D)
         \[5\sigma ,\,\,7\pi \]
  done clear
  View Answer play_arrow

• question_answer141) vant Hoff factor of \[Ca{{(N{{O}_{3}})}_{2}}\] is
  A)
  one                                       
  done clear
  B)
         two
  done clear
  C)
         three                                    
  done clear
  D)
         four
  done clear
  View Answer play_arrow

• question_answer142) 1 mole of \[{{H}_{2}}\] and 2 moles of \[{{I}_{2}}\]are taken initially in \[a\,\,2\,\,I\]vessel. The number of moles of \[{{H}_{2}}\] at equilibrium is\[0.2\]. Then the number of moles of \[{{I}_{2}}\] and \[HI\] at equilibrium are
  A)
  \[1.2,\,\,1.6\]                    
  done clear
  B)
         \[1.8,\,\,1.0\]
  done clear
  C)
         \[0.4,\,\,2.4\]                    
  done clear
  D)
         \[0.8,\,\,2.0\]
  done clear
  View Answer play_arrow

• question_answer143) Degree of dissociation of\[0.1\,\,N\,\,C{{H}_{3}}COOH\], is\[({{K}_{acid}}=1\times {{10}^{-5}})\]
  A)
  \[{{10}^{-5}}\]                                  
  done clear
  B)
         \[{{10}^{-4}}\]
  done clear
  C)
         \[{{10}^{-3}}\]                                  
  done clear
  D)
         \[{{10}^{-2}}\]
  done clear
  View Answer play_arrow

• question_answer144) \[3A\to 2B\]rate of reaction\[\frac{+d[B]}{dt}\]is equal to
  A)
  \[-\frac{3}{2}\frac{d[A]}{dt}\]                   
  done clear
  B)
         \[-\frac{2}{3}\frac{d[A]}{dt}\]
  done clear
  C)
         \[-\frac{1}{3}\frac{d[A]}{dt}\]                   
  done clear
  D)
         \[+2\frac{d[A]}{dt}\]
  done clear
  View Answer play_arrow

• question_answer145) The volume of water to be added to \[100\,\,c{{m}^{3}}\] of \[0.5\,\,N\,\,{{H}_{2}}S{{O}_{4}}\] to get decinormal concentration is
  A)
  \[400\,\,c{{m}^{3}}\]                     
  done clear
  B)
         \[450\,\,c{{m}^{3}}\]
  done clear
  C)
         \[500\,\,c{{m}^{3}}\]                     
  done clear
  D)
         \[100\,\,c{{m}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer146) The compressibility of a gas is less than unity at\[STP\]. Therefore,
  A)
  \[{{V}_{m}}>22.4\,\,L\]                
  done clear
  B)
         \[{{V}_{m}}<22.4\,\,L\]
  done clear
  C)
         \[{{V}_{m}}=22.4\,\,L\]                
  done clear
  D)
         \[{{V}_{m}}=44.8\,\,L\]
  done clear
  View Answer play_arrow

• question_answer147) \[1.520\,\,g\] of hydroxide of a metal on ignition gave \[0.995\,\,g\] of oxide. The equivalent weight of metal is
  A)
  \[1.52\]                               
  done clear
  B)
         \[0.995\]
  done clear
  C)
         \[190\]                                 
  done clear
  D)
         \[9\]
  done clear
  View Answer play_arrow

• question_answer148) Which of the following oxide of nitrogen is most thermally stable?
  A)
  \[{{N}_{2}}{{O}_{5}}\]                   
  done clear
  B)
         \[{{N}_{2}}O\]
  done clear
  C)
         \[NO\]                                 
  done clear
  D)
         \[{{N}_{2}}{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer149) Which of the following gas is used in artificial respiration?
  A)
  \[{{O}_{2}}\]                                     
  done clear
  B)
         \[C{{O}_{2}}\]
  done clear
  C)
          Helium                                
  done clear
  D)
         All of these
  done clear
  View Answer play_arrow

• question_answer150) Which of the following gas is used in warfare?
  A)
  \[{{N}_{2}}O\]                                  
  done clear
  B)
         \[CC{{l}_{3}}\cdot N{{O}_{2}}\]
  done clear
  C)
         \[C{{O}_{2}}\]                                   
  done clear
  D)
         \[{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer151) Essential compound to manufacture acrolein is
  A)
  glycerol                               
  done clear
  B)
         benzene
  done clear
  C)
         phenol                                 
  done clear
  D)
         ammonia
  done clear
  View Answer play_arrow

• question_answer152) Hybridization present in \[Cl{{F}_{3}}\] is
  A)
  \[s{{p}^{2}}\]                    
  done clear
  B)
                         \[s{{p}^{3}}\]
  done clear
  C)
         \[ds{{p}^{2}}\]                                 
  done clear
  D)
         \[s{{p}^{3}}d\]
  done clear
  View Answer play_arrow

• question_answer153) Oxidation number of sulphur in \[{{H}_{2}}{{S}_{2}}{{O}_{8}}\] is
  A)
  \[+6\]                                   
  done clear
  B)
         \[+8\]
  done clear
  C)
         \[+21\]                                
  done clear
  D)
         \[+7\]
  done clear
  View Answer play_arrow

• question_answer154) Number of electrons surrounding \[Kr\] in\[Kr{{F}_{2}}\]is
  A)
  \[10\]                                   
  done clear
  B)
         \[6\]
  done clear
  C)
         \[4\]                                     
  done clear
  D)
         \[8\]
  done clear
  View Answer play_arrow

• question_answer155) Reason of passivity of iron is
  A)
  \[F{{e}_{2}}{{O}_{3}}\]                 
  done clear
  B)
         \[F{{e}_{3}}{{O}_{4}}\]
  done clear
  C)
         \[FeO\]                               
  done clear
  D)
         \[F{{e}_{2}}{{O}_{4}}\cdot 3{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer156) Half-life of radioactive substance is 4 days. Amount of the substance decayed in two day is
  A)
  \[\frac{1}{\sqrt{2}}\]                                     
  done clear
  B)
         \[\left( 1-\frac{1}{\sqrt{2}} \right){{N}_{0}}\]
  done clear
  C)
         \[20%\]                               
  done clear
  D)
         \[\frac{1}{8}\]
  done clear
  View Answer play_arrow

• question_answer157) \[{{K}_{2}}Hg{{l}_{4}}\] is used to lest the following
  A)
  \[NH_{4}^{+}\]                
  done clear
  B)
         \[Cl\]
  done clear
  C)
         \[Br\]                                   
  done clear
  D)
         \[I\]
  done clear
  View Answer play_arrow

• question_answer158) \[H-O-O\]bond angle in\[{{H}_{2}}{{O}_{2}}\]is
  A)
  \[{{90}^{o}}\]                                    
  done clear
  B)
         \[{{180}^{o}}\]
  done clear
  C)
         \[{{109.5}^{o}}\]                              
  done clear
  D)
         \[{{94.8}^{o}}\]
  done clear
  View Answer play_arrow

• question_answer159) Iodine is tested by the following reagent
  A)
  starch                                   
  done clear
  B)
         urea
  done clear
  C)
         glucose                
  done clear
  D)
         glycerol
  done clear
  View Answer play_arrow

• question_answer160) Half-life of a radioactive element is
  A)
  \[0.693\]                             
  done clear
  B)
         \[\frac{1}{0.693}\]
  done clear
  C)
         \[\frac{0.693}{k}\]                          
  done clear
  D)
         \[\frac{k}{0.693}\]
  done clear
  View Answer play_arrow

• question_answer161) Radioactive metal is
  A)
  \[Li\]                                     
  done clear
  B)
         \[Ce\]
  done clear
  C)
         \[Na\]                                  
  done clear
  D)
         \[Ra\]
  done clear
  View Answer play_arrow

• question_answer162) Which has smallest size?
  A)
  \[N{{a}^{+}}\]                                   
  done clear
  B)
         \[M{{g}^{2+}}\]
  done clear
  C)
         \[Ne\]                                  
  done clear
  D)
         \[{{O}^{2-}}\]
  done clear
  View Answer play_arrow

• question_answer163) Phenol on reaction with \[B{{r}_{2}}\] gives
  A)
  \[o-\]bromophenol
  done clear
  B)
         \[p-\]bromophenol
  done clear
  C)
         \[2,\,\,4,\,\,6-\]tribromophenol
  done clear
  D)
         \[1,\,\,3,\,\,5-\]tribromobenzene
  done clear
  View Answer play_arrow

• question_answer164) Electron deficient molecule is
  A)
  \[CC{{l}_{4}}\]                  
  done clear
  B)
         \[PC{{l}_{5}}\]
  done clear
  C)
         \[B{{F}_{3}}\]                                    
  done clear
  D)
         \[S{{F}_{6}}\]
  done clear
  View Answer play_arrow

• question_answer165) Which is the correct relation for diffusion a gases?
  A)
  \[r\propto d\]                  
  done clear
  B)
         \[r\propto \sqrt{d}\]
  done clear
  C)
         \[r\propto \frac{1}{\sqrt{d}}\]                  
  done clear
  D)
         None of these
  done clear
  View Answer play_arrow

• question_answer166) Aniline with \[CHC{{l}_{3}}\] and \[KOH\] on heating gives
  A)
  isocyanide          
  done clear
  B)
         cyanide
  done clear
  C)
          phenol                                
  done clear
  D)
         salicylic acid
  done clear
  View Answer play_arrow

• question_answer167) Geometrical isomerism is found in
  A)
  pemene-1      
  done clear
  B)
         propene
  done clear
  C)
         2-butene       
  done clear
  D)
         butene-1
  done clear
  View Answer play_arrow

• question_answer168) Most acidic is
  A)
   
  done clear
  B)
        
  done clear
  C)
        
  done clear
  D)
          
  done clear
  View Answer play_arrow

• question_answer169) Hydrolysis of sodium acetate gives
  A)
  acidic solution
  done clear
  B)
         basic solution
  done clear
  C)
         amphoteric solution
  done clear
  D)
         neutral solution
  done clear
  View Answer play_arrow

• question_answer170) Isotopic pair is
  A)
  \[_{20}{{X}^{40}},\,{{\,}_{21}}{{Y}^{40}}\]                            
  done clear
  B)
         \[_{20}{{X}^{40}},\,{{\,}_{20}}{{X}^{41}}\]
  done clear
  C)
         \[_{40}{{X}^{20}},\,{{\,}_{41}}{{X}^{20}}\]                            
  done clear
  D)
         none of these
  done clear
  View Answer play_arrow

• question_answer171) \[Z\xrightarrow{PC{{l}_{5}}}X\xrightarrow{Alc.\,\,KOH}Y\xrightarrow[2{{H}_{2}}O/\Delta ]{conc.\,\,{{H}_{2}}S{{O}_{4}}}Z\] Here \[Z\] is
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-OH\]
  done clear
  B)
         \[{{(C{{H}_{3}})}_{3}}-C-OH\]
  done clear
  C)
         \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}\]
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer172) Fuel, used in nuclear reactor is
  A)
  plutonium          
  done clear
  B)
         thorium
  done clear
  C)
         radium                                 
  done clear
  D)
         deuterium
  done clear
  View Answer play_arrow

• question_answer173) Atomic number of an element is equal to the number of
  A)
  protons
  done clear
  B)
         neutrons
  done clear
  C)
         protons + electrons
  done clear
  D)
         protons + neutrons
  done clear
  View Answer play_arrow

• question_answer174) Following pair is separated by yellow ammonium sulphide
  A)
  \[CdS,\,\,B{{i}_{2}}{{S}_{3}}\]                    
  done clear
  B)
         \[B{{i}_{2}}{{S}_{3}},\,\,PbS\]
  done clear
  C)
         \[PbS,\,\,HgS\]                
  done clear
  D)
         \[CdS,\,\,A{{g}_{2}}{{S}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer175) Cationic hydrolysis gives the following solution
  A)
  acidic
  done clear
  B)
         basic
  done clear
  C)
         neutral
  done clear
  D)
         amphoteric
  done clear
  View Answer play_arrow

• question_answer176) Which gives nucleophilic addition most easily?
  A)
  \[C{{H}_{3}}CHO\]                          
  done clear
  B)
         \[C{{H}_{3}}C{{H}_{2}}CHO\]
  done clear
  C)
         \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,HCHO\]          
  done clear
  D)
         \[HCHO\]
  done clear
  View Answer play_arrow

• question_answer177) Compound reacting with alkaline\[KMn{{O}_{4}}\]
  A)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  OH \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\]
  done clear
  B)
         \[C{{H}_{3}}-\overset{\begin{smallmatrix}  OH \\  | \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}\]
  done clear
  C)
         \[{{(C{{H}_{3}})}_{3}}C-C{{H}_{2}}OH\]
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer178) Lucas reagent reacts fastest with
  A)
  butanol-1
  done clear
  B)
         butanol-2
  done clear
  C)
         2-methyl-propanol-2
  done clear
  D)
         2-methyl-propanol-1
  done clear
  View Answer play_arrow

• question_answer179) Reagent used to extract silver from \[A{{g}_{2}}S\] is
  A)
  \[NaCN\]
  done clear
  B)
         \[NaCN\] in presence of\[{{O}_{2}}\]
  done clear
  C)
         \[NaCl\]
  done clear
  D)
         \[AgN{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer180) Number of moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] reduced by one mole of\[S{{n}^{2+}}\]?
  A)
  \[\frac{1}{3}\]                                   
  done clear
  B)
         \[3\]
  done clear
  C)
         \[\frac{1}{6}\]                                   
  done clear
  D)
         \[6\]
  done clear
  View Answer play_arrow

• question_answer181) \[{{S}_{N}}2\]mechanism is involved in the following substitution
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-Cl+O{{H}^{-}}\]
  done clear
  B)
         \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  Cl \\  | \end{smallmatrix}}{\mathop{C}}}\,l-C{{H}_{3}}+O{{H}^{-}}\]
  done clear
  C)
         \[C{{H}_{3}}-\overset{\begin{smallmatrix}  Cl \\  | \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}+O{{H}^{-}}\]
  done clear
  D)
         \[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  Cl \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}+O{{H}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer182) Radioactive isotope of hydrogen is
  A)
  uranium                              
  done clear
  B)
         deuterium
  done clear
  C)
         tritium                 
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer183) Electronic configuration of hydride ion is
  A)
  \[1{{s}^{0}}\]                                    
  done clear
  B)
         \[1{{s}^{1}}\]
  done clear
  C)
         \[1{{s}^{2}}\]                                    
  done clear
  D)
         \[1{{s}^{1}}2{{s}^{1}}\]
  done clear
  View Answer play_arrow

• question_answer184) Suitable conditions for melting of ice
  A)
  high temperature and high pressure
  done clear
  B)
         high temperature and low pressure
  done clear
  C)
         low temperature and tow pressure
  done clear
  D)
         low temperature and high pressure
  done clear
  View Answer play_arrow

• question_answer185) Least ionized salt is
  A)
  \[KCl\]                                 
  done clear
  B)
         \[AgCl\]
  done clear
  C)
         \[MgC{{l}_{2}}\]                              
  done clear
  D)
         \[CaC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer186) Difference in the inching and boiling points of inert gases are
  A)
  large                                     
  done clear
  B)
         small
  done clear
  C)
         no difference   
  done clear
  D)
         none of these
  done clear
  View Answer play_arrow

• question_answer187) Essential component of amalgam is
  A)
  \[Fe\]                                   
  done clear
  B)
         \[Pb\]
  done clear
  C)
         \[Hg\]                                  
  done clear
  D)
         \[Cr\]
  done clear
  View Answer play_arrow

• question_answer188) Following is estimated by Liebig method
  A)
  \[C\]and\[H\]                                   
  done clear
  B)
         nitrogen
  done clear
  C)
         chlorine               
  done clear
  D)
         bromine
  done clear
  View Answer play_arrow

• question_answer189) Inorganic graphite is
  A)
  \[BN\]                                  
  done clear
  B)
         \[B{{F}_{3}}\]
  done clear
  C)
         \[{{B}_{2}}{{H}_{6}}\]                    
  done clear
  D)
         none of these
  done clear
  View Answer play_arrow

• question_answer190) Nausadar is
  A)
  \[N{{H}_{4}}N{{O}_{3}}\]                             
  done clear
  B)
         \[N{{H}_{4}}Cl\]
  done clear
  C)
         \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]                           
  done clear
  D)
         \[N{{H}_{4}}OH\]
  done clear
  View Answer play_arrow

• question_answer191) Number of unpaired electrons in \[{{O}_{2}}\] molecule is
  A)
  zero                                      
  done clear
  B)
         one
  done clear
  C)
         two                                       
  done clear
  D)
         four
  done clear
  View Answer play_arrow

• question_answer192) Anode in the galvanic cell, is
  A)
  negative electrode
  done clear
  B)
         positive electrode
  done clear
  C)
         neutral electrode
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer193) Normal solution is
  A)
  inert solution
  done clear
  B)
         acidic solution
  done clear
  C)
         one litre containing one equivalent
  done clear
  D)
         basic solution
  done clear
  View Answer play_arrow

• question_answer194) In exothermic reaction, heat is
  A)
  given out
  done clear
  B)
         absorbed
  done clear
  C)
         not involved
  done clear
  D)
         given out or absorbed
  done clear
  View Answer play_arrow

• question_answer195) Element having maximum electron affinity is
  A)
  fluorine                               
  done clear
  B)
         chlorine
  done clear
  C)
         bromine              
  done clear
  D)
         iodine
  done clear
  View Answer play_arrow

• question_answer196) Bond order in benzene is
  A)
  1                                             
  done clear
  B)
         2
  done clear
  C)
         1.5                                         
  done clear
  D)
         none of these
  done clear
  View Answer play_arrow

• question_answer197) Phenol and benzoic acid may be distinguished by
  A)
  \[NaHC{{O}_{3}}\]                          
  done clear
  B)
         \[NaOH\]
  done clear
  C)
         \[Na\]                                  
  done clear
  D)
         \[PC{{l}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer198) Correct order of basic nature is
  A)
  \[N{{H}_{3}}>C{{H}_{3}}N{{H}_{2}}>{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]
  done clear
  B)
         \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}>N{{H}_{3}}>C{{H}_{3}}N{{H}_{2}}\]
  done clear
  C)
         \[C{{H}_{3}}N{{H}_{2}}>N{{H}_{3}}>{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]
  done clear
  D)
         none of the above
  done clear
  View Answer play_arrow

• question_answer199) Element having maximum ionization energy
  A)
  \[Na\]                                  
  done clear
  B)
         \[Li\]
  done clear
  C)
         \[K\]                                     
  done clear
  D)
         \[Rb\]
  done clear
  View Answer play_arrow

• question_answer200) \[HCHO\]reacts with \[N{{H}_{3}}\] to give
  A)
   urotropine        
  done clear
  B)
         bakelite
  done clear
  C)
         terylene              
  done clear
  D)
         glyptal
  done clear
  View Answer play_arrow

• question_answer201) Which of the following is a correct match?
  A)
   Downs syndrome - 21st chromosome
  done clear
  B)
   Sickel cell anaemia- X-chromosome
  done clear
  C)
   Haemophilia- Y-chromosome
  done clear
  D)
   Parkinson disease - X and Y-chromosome
  done clear
  View Answer play_arrow

• question_answer202) Hydrolytic enzymes which act at low pH are called as
  A)
   proteases          
  done clear
  B)
          \[\alpha \]-amylases    
  done clear
  C)
          hydrolases        
  done clear
  D)
          peroxidase
  done clear
  View Answer play_arrow

• question_answer203) Acromegaly is caused by
  A)
   excess of STH  
  done clear
  B)
          excess of thyroxine
  done clear
  C)
   deficiency of thyroxine
  done clear
  D)
   excess of adrenaline
  done clear
  View Answer play_arrow

• question_answer204) Gentric drift operates in
  A)
   small isolated population
  done clear
  B)
   large isolated population
  done clear
  C)
   fast reproductive population
  done clear
  D)
   slow reproductive population
  done clear
  View Answer play_arrow

• question_answer205) Mainly which type of hormones control the menstrual cycle in human beings?
  A)
   FSH                      
  done clear
  B)
          I.H                        
  done clear
  C)
          FSH, LH, Oestrogen       
  done clear
  D)
   Progesterone
  done clear
  View Answer play_arrow

• question_answer206) When both ovaries are removed from rat which hormone is decreased in blood
  A)
   oxylocin             
  done clear
  B)
          prolactin
  done clear
  C)
   Ostrogen
  done clear
  D)
   gonadotrophic releasing factor
  done clear
  View Answer play_arrow

• question_answer207) Which cartilage is present on the end of long bones ?
  A)
   Calcified cartilage           
  done clear
  B)
   Hyaline cartilage
  done clear
  C)
   Elastic cartilage
  done clear
  D)
          Fibrous cartilage
  done clear
  View Answer play_arrow

• question_answer208) In fluid mosaic model of plasma membrane
  A)
   upper layer is non-polar and hydrophilic
  done clear
  B)
   polar layer is hydrophobic
  done clear
  C)
   phospholipids form a bimolecular layer middle part
  done clear
  D)
   proteins from a middle layer
  done clear
  View Answer play_arrow

• question_answer209) According to fossils discovered upto present time, origin and evolution of man was started from which country?
  A)
   France                
  done clear
  B)
          Java
  done clear
  C)
   Africa                  
  done clear
  D)
          China
  done clear
  View Answer play_arrow

• question_answer210) Which of the following statement is true for lymph?
  A)
   WBC and serum
  done clear
  B)
   All components of blood except RBCs and some proteins
  done clear
  C)
   RBCs, WBCs and Plasma
  done clear
  D)
   RBCs, Proteins and Platelets
  done clear
  View Answer play_arrow

• question_answer211) Impulse of heart beat originates from
  A)
   SA node             
  done clear
  B)
          AV node
  done clear
  C)
   vagus nerve    
  done clear
  D)
          cardiac nerve
  done clear
  View Answer play_arrow

• question_answer212) Continuous bleeding from an injured part of body is due to deficiency of
  A)
   Vitamin-A          
  done clear
  B)
          vitamin-B
  done clear
  C)
   vitamin-K           
  done clear
  D)
          vitamin-E
  done clear
  View Answer play_arrow

• question_answer213) Which of the following statement is correct about the node of Ranvier?
  A)
   Axolemm is discontinuous
  done clear
  B)
   Myelin sheath is discontinuous
  done clear
  C)
   Both neurilemma and myelin sheath are discontinuous
  done clear
  D)
   Covered by myelin sheath
  done clear
  View Answer play_arrow

• question_answer214) Number of wild life is continuously decreasing. What is the main reason of this?
  A)
   Predation
  done clear
  B)
   Cutting down of forests
  done clear
  C)
   Destruction of habitats
  done clear
  D)
   Hunting
  done clear
  View Answer play_arrow

• question_answer215) In which era reptiles were dominated?
  A)
   Coenozoic era  
  done clear
  B)
          Meszoic era
  done clear
  C)
   Palaeozoic era  
  done clear
  D)
          Archazoic era
  done clear
  View Answer play_arrow

• question_answer216) What is true for individual of same species?
  A)
   Live in same niche
  done clear
  B)
   Live in same habitat
  done clear
  C)
   Interbreeding
  done clear
  D)
   Live in different habitats
  done clear
  View Answer play_arrow

• question_answer217) Which of the following is absent in polluted water?
  A)
   Hydrilla               
  done clear
  B)
          Water hyacinth
  done clear
  C)
                          Larva of stone fly           
  done clear
  D)
   Blue green algae
  done clear
  View Answer play_arrow

• question_answer218) In Protozoa like Amoeba and Paramecium an organelle is found for osmoregulation which is
  A)
   contractile vacuole        
  done clear
  B)
   mitochondria                   
  done clear
  C)
   nucleus              
  done clear
  D)
          food vacuole
  done clear
  View Answer play_arrow

• question_answer219) During its formation, bread becomes porous due to release of \[C{{O}_{2}}\] by the action of
  A)
   yeast                   
  done clear
  B)
          bacteria              
  done clear
  C)
   virus                    
  done clear
  D)
          protoxoans
  done clear
  View Answer play_arrow

• question_answer220) Which bacteria are utilized in gober gas plant?
  A)
   Methanogens
  done clear
  B)
   Nitrifying bacteria
  done clear
  C)
   Ammonifying bacteria
  done clear
  D)
   Denitrifying bacteria
  done clear
  View Answer play_arrow

• question_answer221) Which of the following is without exception in angiosperms?
  A)
   Presence of vessels      
  done clear
  B)
   Double fertilization
  done clear
  C)
   Secondary growth
  done clear
  D)
   Autotrophic nutrition
  done clear
  View Answer play_arrow

• question_answer222) Cancerous cells can easily be destroyed by  radiation due to       
  A)
   rapid cell division
  done clear
  B)
         lack of nutrition
  done clear
  C)
   fast mutation   
  done clear
  D)
          lack of oxygen
  done clear
  View Answer play_arrow

• question_answer223) Which of the following does not secrete toxins during storage conditions of crop plants?
  A)
   Aspergillus        
  done clear
  B)
          Penicillium
  done clear
  C)
   Fusarium           
  done clear
  D)
          Colletotrichum
  done clear
  View Answer play_arrow

• question_answer224) Which of the following plant produces seeds but not flowers?
  A)
   Maize                  
  done clear
  B)
          Mint
  done clear
  C)
   Peepal                
  done clear
  D)
          Pinus
  done clear
  View Answer play_arrow

• question_answer225) Best material for the study of mitosis in laboratory is
  A)
   anther                
  done clear
  B)
          root tip
  done clear
  C)
   leaf tip                
  done clear
  D)
          ovary
  done clear
  View Answer play_arrow

• question_answer226) Mitotic spindle is mainly composed of which proteins?
  A)
   Actin                    
  done clear
  B)
          Myosin
  done clear
  C)
   Actomyosin     
  done clear
  D)
          Myoglobin
  done clear
  View Answer play_arrow

• question_answer227) Which of the following occurs more than one and less than five in a chromosome?
  A)
   Chromalid         
  done clear
  B)
          Chromomcre
  done clear
  C)
   Cenlromere      
  done clear
  D)
          Telomere
  done clear
  View Answer play_arrow

• question_answer228) Organisms which obtain energy by the oxidation of reduced inorganic compound are called
  A)
   photoautotrophs
  done clear
  B)
         chemoautotrophs
  done clear
  C)
   saprozoic           
  done clear
  D)
          coproheterotrophs
  done clear
  View Answer play_arrow

• question_answer229) In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by
  A)
   pectocellulose   
  done clear
  B)
          callose
  done clear
  C)
   cellulose            
  done clear
  D)
          sporopollenin
  done clear
  View Answer play_arrow

• question_answer230) Which type of association is found in between entomophilous flower and pollinating agent?
  A)
   Mutualism        
  done clear
  B)
          Commensalism
  done clear
  C)
   Cooperation    
  done clear
  D)
          Co-evolution
  done clear
  View Answer play_arrow

• question_answer231) What is the direction of micropyle in anatropous ovule?
  A)
   Upward              
  done clear
  B)
          Downward
  done clear
  C)
   Right                    
  done clear
  D)
          Left
  done clear
  View Answer play_arrow

• question_answer232) Maximum greenhouse gas is released by which country ?
  A)
   India                    
  done clear
  B)
          France
  done clear
  C)
   USA                     
  done clear
  D)
          Britain
  done clear
  View Answer play_arrow

• question_answer233) In angiosperms, pollen tube liberates their male gametes into the
  A)
   central cell        
  done clear
  B)
          antipodal cell
  done clear
  C)
   egg cell               
  done clear
  D)
          synergids
  done clear
  View Answer play_arrow

• question_answer234) Which of the following absorb light energy for photosynthesis?
  A)
   Chlorophyll       
  done clear
  B)
          Water molecule
  done clear
  C)
   \[{{O}_{2}}\]                                    
  done clear
  D)
   Ku BP
  done clear
  View Answer play_arrow

• question_answer235) In photosynthesis energy from light reaction to dark reaction is transferred in the form of
  A)
   ADP                     
  done clear
  B)
          ATP
  done clear
  C)
   RuDP                   
  done clear
  D)
          Chlorophyll
  done clear
  View Answer play_arrow

• question_answer236) Opening and closing of stomata is due to
  A)
   hormonal change in guard cells
  done clear
  B)
   change in turgor pressure of guard cells
  done clear
  C)
   gaseous exchange         
  done clear
  D)
   respiration
  done clear
  View Answer play_arrow

• question_answer237) Which pigment absorbs the red and far red light?
  A)
   Cytochrome    
  done clear
  B)
          Phytochrome
  done clear
  C)
   Carotenoids                     
  done clear
  D)
   Chlorophyll
  done clear
  View Answer play_arrow

• question_answer238) Seed dormancy is due to the
  A)
   ethylene            
  done clear
  B)
          abscisic acid
  done clear
  C)
   IAA                       
  done clear
  D)
          starch
  done clear
  View Answer play_arrow

• question_answer239) Edible part in mango is
  A)
   mesocarp
  done clear
  B)
   epicarp
  done clear
  C)
   endocarp           
  done clear
  D)
          epidermis
  done clear
  View Answer play_arrow

• question_answer240) What is true for cleavage?
  A)
   Size of embryo increases
  done clear
  B)
   Size of cells decreases
  done clear
  C)
   Size of cells increases
  done clear
  D)
   Size of embryo decreases
  done clear
  View Answer play_arrow

• question_answer241) Geocarpic fruit is
  A)
   potato                                
  done clear
  B)
   peanut
  done clear
  C)
   onion                                  
  done clear
  D)
   garlic
  done clear
  View Answer play_arrow

• question_answer242) In which animal nerve cell is present but brain is absent?
  A)
   Sponge                               
  done clear
  B)
   Earthworm
  done clear
  C)
   Cockroach         
  done clear
  D)
          Hydra
  done clear
  View Answer play_arrow

• question_answer243) In bacteria, plasmid is
  A)
   extrachromosomal material
  done clear
  B)
   main DNA
  done clear
  C)
   non-functional DNA      
  done clear
  D)
   repetitive gene
  done clear
  View Answer play_arrow

• question_answer244) Two different species cannot live for long duration in the same niche or habitat. This law is
  A)
   Aliens law          
  done clear
  B)
          Mendels law
  done clear
  C)
   Causes competitive exclusion principle
  done clear
  D)
   Weismanns theory
  done clear
  View Answer play_arrow

• question_answer245) A gene is said to be dominant if
  A)
   it expresses its effect only in homozygous state
  done clear
  B)
   it expresses only in heterozygous condition
  done clear
  C)
   it expresses in both homozygous and heterozygous conditions
  done clear
  D)
   it is never expressed in any condition
  done clear
  View Answer play_arrow

• question_answer246) Pleiotropic gene is,
  A)
   haemophilia     
  done clear
  B)
          thalasscmia
  done clear
  C)
   sickle cell anaemia
  done clear
  D)
         colourblindness
  done clear
  View Answer play_arrow

• question_answer247) Four radial vascular bundles are found in
  A)
   dicot root                          
  done clear
  B)
   monocot root
  done clear
  C)
   dicot stem         
  done clear
  D)
          monocot stem
  done clear
  View Answer play_arrow

• question_answer248) Vessels are found in
  A)
   all angiosperms and some gymnosperms
  done clear
  B)
   most of the angiosperms and few gymnosperms
  done clear
  C)
   all angiosperms, all gymnosperms and some pteridophytes
  done clear
  D)
   all pteridophytes
  done clear
  View Answer play_arrow

• question_answer249) Jacob and Monod studied lactose metabolism in E. coli and proposed operon concept. Operon concept applicable for
  A)
   all prokaryotes
  done clear
  B)
   all prokaryotes and some cukaryotes
  done clear
  C)
   all prokaryotic and all eukaryotic
  done clear
  D)
   all prokaryoics and some protozoans
  done clear
  View Answer play_arrow

• question_answer250) A diseased man marries a normal woman and they get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this diseases is
  A)
   sex-linked dominant    
  done clear
  B)
   sex-linked recessive
  done clear
  C)
   sex-limited character
  done clear
  D)
   autosomal dominant
  done clear
  View Answer play_arrow

• question_answer251) In a DNA perecame fithymine is 20. What is the percentage of guanine?
  A)
   20%
  done clear
  B)
                                          40%
  done clear
  C)
   30%                                      
  done clear
  D)
   60%
  done clear
  View Answer play_arrow

• question_answer252) Which of the following is the example of sex-linked disease?
  A)
   AIDS                                    
  done clear
  B)
   Colorblindness
  done clear
  C)
   Syphilis                               
  done clear
  D)
   Gonorrhoea
  done clear
  View Answer play_arrow

• question_answer253) Which statements are correct for bacterial transduction?
  A)
   Transfer of some genes from one bacteria to another bacteria through virus
  done clear
  B)
   Transfer of genes from one bacteria to another bacteria by conjugation
  done clear
  C)
   Bacteria obtained its DNA directly
  done clear
  D)
   Bacteria obtained DNA from other external source
  done clear
  View Answer play_arrow

• question_answer254) Transformation experiment was first performed on which bacteria?
  A)
   E. coli
  done clear
  B)
   Diplococcus pneumonia
  done clear
  C)
   Salmonella
  done clear
  D)
   Pasteurella pestis
  done clear
  View Answer play_arrow

• question_answer255) A plant of \[{{F}_{1}}\] generation has genotype AABbCC. On selfing of this plant, the phenorypic ratio in \[{{F}_{2}}\] generation will be
  A)
   3 : 1                                      
  done clear
  B)
   1 : 1
  done clear
  C)
   9 : 3 : 3 : 1           
  done clear
  D)
          27 : 9 : 9 : 9 : 3 : 3 : 3 : 1
  done clear
  View Answer play_arrow

• question_answer256) Axillary bud and terminal bud are derived from the activity of
  A)
   lateral meristem               
  done clear
  B)
   intercalary meristem
  done clear
  C)
   apical meristem
  done clear
  D)
          parenchyma
  done clear
  View Answer play_arrow

• question_answer257) Which of the following crops have been brought to India from New world?
  A)
   Cashewnut, potato, rubber
  done clear
  B)
   Mango, tea
  done clear
  C)
   Tea, rubber mango
  done clear
  D)
   Coffee
  done clear
  View Answer play_arrow

• question_answer258) Which of the following enzymes are used to join bits of DNA ?
  A)
   Ligase                                  
  done clear
  B)
   Primase
  done clear
  C)
   DNA polymerase            
  done clear
  D)
   Endonuclease
  done clear
  View Answer play_arrow

• question_answer259) Which of the following statement is true?
  A)
   Vessels are multicellular and with wide lumen
  done clear
  B)
   Tracheids are multicellular and with narrow lumen
  done clear
  C)
  Vessels are unicellular and with narrow lumen
  done clear
  D)
   Tracheids are unicellular and with wide lumen
  done clear
  View Answer play_arrow

• question_answer260) Which of the following reunites the exon segments after RNA splicing?
  A)
   RNA polymerase            
  done clear
  B)
   RNA primase
  done clear
  C)
   RNA ligase                         
  done clear
  D)
   RNA protease
  done clear
  View Answer play_arrow

• question_answer261) There are three genes a, b, c, percentage of crossing over between a and b is 20%. b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome?
  A)
   b, a, c                                  
  done clear
  B)
   a, b, c
  done clear
  C)
   a, c, b                  
  done clear
  D)
          none of these
  done clear
  View Answer play_arrow

• question_answer262) Manipulation of DNA in generic engineering became possible due to the discovery of
  A)
   restriction endonuclease
  done clear
  B)
   DNA ligase
  done clear
  C)
   transcriptase
  done clear
  D)
   primase
  done clear
  View Answer play_arrow

• question_answer263) Convergent evolution is illustrated by
  A)
   starfish and cuttle fish
  done clear
  B)
   dogfish and whale
  done clear
  C)
   rat and dog
  done clear
  D)
   bacterium and protozoan
  done clear
  View Answer play_arrow

• question_answer264) Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?
  A)
   Chameleon        - Mimicry
  done clear
  B)
   Taenia                  - Polymorphism
  done clear
  C)
   Pheretima          - Sexual dimorphism
  done clear
  D)
   Musca                 - Complete metamorphosis
  done clear
  View Answer play_arrow

• question_answer265) Random genetic drift in a population probably result from
  A)
   constant low mutation rate
  done clear
  B)
   large population size
  done clear
  C)
   highly genetically variable individuals
  done clear
  D)
   interbreeding within this population
  done clear
  View Answer play_arrow

• question_answer266) During prolonged fasting, in what sequence are the following organic compounds used up by the body ?
  A)
   First carbohydrates, next proteins and lastly lipids
  done clear
  B)
   First proteins, next lipids and lastly carbohydrate
  done clear
  C)
   First carbohydrate, next fats and lastly proteins
  done clear
  D)
   First fats, next carbohydrates and lastly proteins
  done clear
  View Answer play_arrow

• question_answer267) The apical meristem of the root is present
  A)
   only in adventitious roots
  done clear
  B)
   in all the roots
  done clear
  C)
   only in radicals
  done clear
  D)
   only in tap roots
  done clear
  View Answer play_arrow

• question_answer268) Diffuse porous woods are characteristic of plant growing in
  A)
   temperate climate        
  done clear
  B)
   tropics
  done clear
  C)
   alpine region      
  done clear
  D)
          cold winter regions
  done clear
  View Answer play_arrow

• question_answer269) Which one of the following is wrong in relation to photorespiration?
  A)
   It is a characteristics of \[{{C}_{4}}\] plants
  done clear
  B)
   Ii is a characteristics of \[{{C}_{3}}\] plants
  done clear
  C)
   It occurs in chloroplasts
  done clear
  D)
   It occurs in daytime only
  done clear
  View Answer play_arrow

• question_answer270) Stomata of CAM plants
  A)
   open during the night and close during the day
  done clear
  B)
   never open
  done clear
  C)
   are always open
  done clear
  D)
   open during the day and close at night
  done clear
  View Answer play_arrow

• question_answer271) The major portion of the dry weight of plants comprises of
  A)
   carbon, nitrogen and hydrogen
  done clear
  B)
   carbon, hydrogen and oxygen
  done clear
  C)
   nitrogen, phosphorus and potassium
  done clear
  D)
   calcium, magnesium and sulphur
  done clear
  View Answer play_arrow

• question_answer272) In Drosophila, the sex is determined by
  A)
   the ratio of pairs of X-chromosomes to the pairs of amosomes
  done clear
  B)
   whether the egg is fertilized or develops parthenogenetically
  done clear
  C)
   the ratio of number of X-chromosomes to the set of autosomes
  done clear
  D)
   X and Y-chromosomes               
  done clear
  View Answer play_arrow

• question_answer273) Christmas disease is another name for
  A)
   Downs syndrome          
  done clear
  B)
   sleeping sickness
  done clear
  C)
   haemophilia-B  
  done clear
  D)
          hepatits-B
  done clear
  View Answer play_arrow

• question_answer274) When a cluster of genes show linkage behavior they
  A)
   do not show independent assortment
  done clear
  B)
   induce cell division
  done clear
  C)
   do not show a chromosome map      
  done clear
  D)
   show recombination during meiosis    
  done clear
  View Answer play_arrow

• question_answer275) Degeneration of a genetic code is attributed to the
  A)
   entire codon
  done clear
  B)
   third member of a codon
  done clear
  C)
   first member of a codon
  done clear
  D)
   second member of a codon
  done clear
  View Answer play_arrow

• question_answer276) In a flowering plant, archesporium gives rise to
  A)
   wall and the tapetum
  done clear
  B)
   only tapetum and sporogenous cells
  done clear
  C)
   only the wall of the sporangium
  done clear
  D)
   both wall and the sporogenous cells
  done clear
  View Answer play_arrow

• question_answer277) Which one of the following mineral elements plays an important role in biological nitrogen fixation?
  A)
   Zinc                                      
  done clear
  B)
   Molybdenum
  done clear
  C)
   Copper               
  done clear
  D)
          Manganese
  done clear
  View Answer play_arrow

• question_answer278) In sugarcane plant \[^{14}C{{O}_{2}}\] is fixed in a malic acid, in which the enzyme that fixes \[C{{O}_{2}}\] is
  A)
   ribulose phosphate kinase
  done clear
  B)
   fructose phosphatase
  done clear
  C)
   ribulose biphosphate carboxylase
  done clear
  D)
   phosphoenol pyruvic acid carboxylase
  done clear
  View Answer play_arrow

• question_answer279) Which one of the following is categorized under living fossils?                      
  A)
   Selaginella                        
  done clear
  B)
   Metasequoia      
  done clear
  C)
   Pmus                   
  done clear
  D)
          Cyccu
  done clear
  View Answer play_arrow

• question_answer280) Boron in green plants assists in             
  A)
   photosynthesis               
  done clear
  B)
   sugar transport
  done clear
  C)
   activation of enzymes
  done clear
  D)
   acting as enzyme cofactor
  done clear
  View Answer play_arrow

• question_answer281) Chlorenchyma is known to develop in the
  A)
   spore capsule of a moss
  done clear
  B)
   pollen tube of Pinus
  done clear
  C)
   cytoplasm of Chlorella
  done clear
  D)
   mycelium of a green mould such as Aspergillus
  done clear
  View Answer play_arrow

• question_answer282) The aleurone layer in maize grain is specially rich in
  A)
   lipids                                    
  done clear
  B)
   auxins
  done clear
  C)
   proteins             
  done clear
  D)
          starch
  done clear
  View Answer play_arrow

• question_answer283) Given below are four matchings of an animal and its kind of respiratory organ (A) silver fish      - trachea (B) scorpion        - book lung (C) sea squirt     - pharyngcal gills (D) dolphin         - skin The correct matchings are
  A)
   B and D                               
  done clear
  B)
   C and D
  done clear
  C)
   A and D              
  done clear
  D)
          A, B and C
  done clear
  View Answer play_arrow

• question_answer284) Which of the following discoveries resulted in a Nobel Prize?
  A)
   Recombination of linked genes
  done clear
  B)
   Genetic engineering
  done clear
  C)
   X-rays induce sex-linked recessive lethal mutations
  done clear
  D)
   Cytoplasmic inheritance
  done clear
  View Answer play_arrow

• question_answer285) In which kingdom would you classify the Archaea and nitrogen-fixing organisms. If the five-kingdom system of classification is used
  A)
   Protista                              
  done clear
  B)
   Monera
  done clear
  C)
   Plantae                               
  done clear
  D)
   Fungi
  done clear
  View Answer play_arrow

• question_answer286) Which one of the following traits of garden pea studied by Mendel was a recessive feature ?
  A)
   Green pod colour          
  done clear
  B)
   Round seed shape
  done clear
  C)
   Axial flower position     
  done clear
  D)
   Green seed colour
  done clear
  View Answer play_arrow

• question_answer287) Juicy hair-like structures observed in the lemon fruit develop from
  A)
   endocarp                           
  done clear
  B)
   both (a) and (b)
  done clear
  C)
   exocarp              
  done clear
  D)
          mesocarp
  done clear
  View Answer play_arrow

• question_answer288) Which one of the following describes correctly the homologous structures ?
  A)
   Organs that have no function now, but had an important function in ancestors
  done clear
  B)
   Organs appearing only in embryonic stage and disappearing later in the adult
  done clear
  C)
   Organs with anatomical similarities, but performing different functions
  done clear
  D)
   Organs with anatomical dissimilarities, but performing same functions
  done clear
  View Answer play_arrow

• question_answer289) Darwin in his Natural Selection Theory, did not believe in any role of which one of the following in organic evolution?
  A)
   Struggle for existence
  done clear
  B)
   Discontinuous variations
  done clear
  C)
   Parasites and predators as natural enemies
  done clear
  D)
   Survival of the fittest
  done clear
  View Answer play_arrow

• question_answer290) Escherichia coli is used as an indicator organism to determine pollution of water with
  A)
   industrial effluents        
  done clear
  B)
   pollen of aquatic plants
  done clear
  C)
   heavy metals                   
  done clear
  D)
   faecal matter
  done clear
  View Answer play_arrow

• question_answer291) Which one of the following pairs is not correctly matched?
  A)
   Vitamin \[{{B}_{12}}\]                   -   Pernicious anaemia
  done clear
  B)
   Vitamin \[{{B}_{1}}\]    -   Beri-beri
  done clear
  C)
   Vitamin C                            -   Scurvy
  done clear
  D)
   Vitamin \[{{B}_{2}}\]    -    Pellagra
  done clear
  View Answer play_arrow

• question_answer292) Which elements are located at the centre of the porphyrin ring in chlorophyll?
  A)
   Potassium                         
  done clear
  B)
   Manganese
  done clear
  C)
   Calcium              
  done clear
  D)
          Magnesium
  done clear
  View Answer play_arrow

• question_answer293) In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?
  A)
   61                                         
  done clear
  B)
   60
  done clear
  C)
   20                                         
  done clear
  D)
   64
  done clear
  View Answer play_arrow

• question_answer294) Systemic heart refers to
  A)
   entire heart in lower vertebrates
  done clear
  B)
   the two ventricles together in humans
  done clear
  C)
   the heart that contracts under stimulation from nervous system
  done clear
  D)
   left auricle and left ventricle in higher vertebrates
  done clear
  View Answer play_arrow

• question_answer295) In which one of the following options the two names refer to one and the same thing?
  A)
   Citric acid cycle and Calvin cycle
  done clear
  B)
   Tricarboxylic acid cycle and urea cycle
  done clear
  C)
   Krebs cycle and Calvin cycle
  done clear
  D)
   Tricarboxylic acid cycle and citric acid cycle
  done clear
  View Answer play_arrow

• question_answer296) Test tube baby means a baby born when
  A)
   the ovum is fertilized externally and thereafter implanted in the uterus
  done clear
  B)
   it developes from a non-fertilized egg
  done clear
  C)
   it is developed in a test tube
  done clear
  D)
   it is developed through tissue culture method
  done clear
  View Answer play_arrow

• question_answer297) During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral  or  medial/lateral axis is called
  A)
   anamorphosis                 
  done clear
  B)
   pattern formation
  done clear
  C)
   organizer phenomena
  done clear
  D)
   axis formation
  done clear
  View Answer play_arrow

• question_answer298) Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as
  A)
   dihybrid cross                  
  done clear
  B)
   reverse cross
  done clear
  C)
   test cross           
  done clear
  D)
          reciprocal cross
  done clear
  View Answer play_arrow

• question_answer299) Pattern baldness, moustaches and beard in human males arc examples of
  A)
   sex differentiating traits
  done clear
  B)
   sex determining traits
  done clear
  C)
   sex linked trails
  done clear
  D)
   sex limited traits
  done clear
  View Answer play_arrow

• question_answer300) Plants reproducing by spores such as mosses and ferns are grouped under the general term
  A)
   sporophytes    
  done clear
  B)
   thatlophytes
  done clear
  C)
   cryptogams     
  done clear
  D)
          bryophyles
  done clear
  View Answer play_arrow