Solved papers for JCECE Medical JCECE Medical Solved Paper-2012

done JCECE Medical Solved Paper-2012 Total Questions - 150

• question_answer1) A monkey of 25 kg is holding a vertical rope. The rope does not break if a body of mass 30 kg is suspended from it, but the rope breaks if the mass of body suspended with the rope exceeds 30 kg. What will be the maximum acceleration with which the monkey can climb up along the rope?\[(Take\,g=10m{{s}^{-2}})\]
  A)
  \[2.0\,m{{s}^{-2}}\]
  done clear
  B)
   \[2.5\,m{{s}^{-2}}\]
  done clear
  C)
   \[3.0\,m{{s}^{2}}\]
  done clear
  D)
   \[4.0\,m{{s}^{-2}}\]
  done clear
  View Answer play_arrow

• question_answer2) A mass of 10 g moving horizontally with a velocity of \[\text{100}\,\text{cm}{{\text{s}}^{-1}}\] strikes a pendulum bob of same mass. The two masses after collision stick together. What will be the maximum height reached by the system now? \[(Take\,g=10\,m{{s}^{-2}})\]
  A)
   Zero
  done clear
  B)
   1.25 cm
  done clear
  C)
   2.5 cm
  done clear
  D)
   5cm
  done clear
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• question_answer3) The three physical quantities x, y and z have units \[g\,c{{m}^{2}}{{s}^{-5}},g\,{{s}^{-1}}\]and \[cm{{s}^{-2}}\]respectively. The relation between x, y and z is
  A)
  \[x=y{{z}^{2}}\]
  done clear
  B)
   \[x={{y}^{2}}z\]
  done clear
  C)
   \[{{y}^{2}}=xz\]
  done clear
  D)
  \[z={{x}^{2}}y\]
  done clear
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• question_answer4) If a vector A having a magnitude of 8 is added to a vector B which lies along \[x-\]axis, then the resultant of two vectors lies along y-axis and has magnitude twice that of B. The magnitude of B is
  A)
  \[\frac{6}{\sqrt{5}}\]
  done clear
  B)
   \[\frac{12}{\sqrt{5}}\]
  done clear
  C)
   \[\frac{16}{\sqrt{5}}\]
  done clear
  D)
   \[\frac{8}{\sqrt{5}}\]
  done clear
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• question_answer5) If the length of potentiometer wire is increased, then the length of the previously obtained balance point will
  A)
   increase
  done clear
  B)
   decrease
  done clear
  C)
   remains unchanged
  done clear
  D)
   becomes two times
  done clear
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• question_answer6) If a steel wire of length \[l\] and magnetic moment M is bent into a semicircular arc, then the new magnetic moment is
  A)
  \[M\times l\]
  done clear
  B)
   \[\frac{M}{l}\]
  done clear
  C)
   \[\frac{2M}{\pi }\]
  done clear
  D)
   \[M\]
  done clear
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• question_answer7) The amplitude and the periodic time of a SHM are 5 cm and 6 s respectively. At a distance of 2.5 cm away from the mean position, the phase will be
  A)
  \[\frac{\pi }{3}\]
  done clear
  B)
   \[\frac{\pi }{4}\]
  done clear
  C)
   \[\frac{\pi }{6}\]
  done clear
  D)
   \[\frac{5\pi }{12}\]
  done clear
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• question_answer8) If all of a sudden the radius of the earth decreases, then which one of the following statements will be true?
  A)
   The angular momentum of the earth will become greater than that of the sun.
  done clear
  B)
   The periodic time of the earth will increase.
  done clear
  C)
   The energy and angular momentum will  remain constant.
  done clear
  D)
   The angular velocity of the earth will increase
  done clear
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• question_answer9) If the external torque acting on a system is zero \[(i.e.,\,\tau =0),\] then
  A)
  \[J=0\]            
  done clear
  B)
  \[F=0\]
  done clear
  C)
   \[\omega =0\]            
  done clear
  D)
  \[\alpha =0\]
  done clear
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• question_answer10) Two point charges \[-\text{ }q\]and \[+\text{ }q/2\] are situated at the origin and the point (a, 0, 0) respectively. The point along the \[x-\]axis, where the electric field vanishes is
  A)
   \[x=\sqrt{2}\,a\]
  done clear
  B)
   \[x=\frac{a}{\sqrt{2}}\]
  done clear
  C)
   \[x=\frac{\sqrt{2}\,a}{\sqrt{2}-1}\]
  done clear
  D)
   \[x=\frac{\sqrt{2a}}{\sqrt{2}+1}\]
  done clear
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• question_answer11) When the kinetic energy of an electron is increased, the wavelength of the associated wave will
  A)
   decrease
  done clear
  B)
   increase
  done clear
  C)
   remains unchanged
  done clear
  D)
   None of these
  done clear
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• question_answer12) A current\[i\]ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance r metre from the axis is
  A)
  \[\infty \]
  done clear
  B)
   Zero
  done clear
  C)
   \[\frac{{{\mu }_{0}}}{4\pi }\frac{2i}{r}\]
  done clear
  D)
   \[\frac{{{\mu }_{0}}}{4\pi }\frac{2\pi i}{r}\]
  done clear
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• question_answer13) Two parallel long wires carry currents \[{{i}_{1}}\]and \[{{i}_{2}}\]with \[{{i}_{1}}>{{i}_{2}}.\]When the currents are in the same direction, the magnetic field midway between the wires is \[10\,\mu T.\] When the direction of \[{{i}_{2}}\] is reversed, it becomes \[40\mu T.\]Then, ratio of \[{{i}_{1}}/{{i}_{2}}\]is
  A)
   3 : 4
  done clear
  B)
   5 : 3
  done clear
  C)
   7 : 11
  done clear
  D)
   11 : 7
  done clear
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• question_answer14)  The two coherent sources of equal intensity produce maximum intensity of 100 units at a point. If the intensity of one of the sources is reduced by 36% by reducing its width then the intensity of light at the same point will be
  A)
   67              
  done clear
  B)
   81
  done clear
  C)
   89               
  done clear
  D)
   90
  done clear
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• question_answer15) A convex mirror of focal length \[f\] forms an image which is \[\frac{1}{n}\] times the object. The distance of the object from the mirror is
  A)
  \[\left( \frac{n-1}{n} \right)f\]
  done clear
  B)
   \[\left( \frac{n+1}{n} \right)f\]
  done clear
  C)
   \[(n+1)f\]
  done clear
  D)
   \[(n-1)f\]
  done clear
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• question_answer16) Consider a hydrogen like atom whose energy in  nth excited state is given by \[{{E}_{n}}=-\frac{13.6{{Z}^{2}}}{{{n}^{2}}},\] when this excited atom makes a transition from excited state to ground state, most energetic photons have energy \[{{E}_{\max }}=52.224\,eV\]and least   energetic   photons   have   energy \[{{E}_{\min }}=1.224\,eV.\] The atomic number of atom is
  A)
   2
  done clear
  B)
   4
  done clear
  C)
   5
  done clear
  D)
   None of the above
  done clear
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• question_answer17) A diode is connected to \[\text{220}\,\text{V(rms)}\] AC in series with a capacitor as shown in figure. The voltage  across the capacitor is
  A)
  \[220\,V\]
  done clear
  B)
   \[110\,V\]
  done clear
  C)
   \[311.1\,V\]
  done clear
  D)
   \[\frac{220}{\sqrt{2}}V\]
  done clear
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• question_answer18) A wave travelling along positive \[x-\]axis is given by \[y=A\sin (\omega t-kx).\]If it is reflected from a rigid boundary such that 80% amplitude is reflected, then equation of reflected wave is
  A)
  \[y=A\sin (\omega t+0.8kx)\]
  done clear
  B)
   \[y=-0.8A\sin (\omega t+kx)\]
  done clear
  C)
   \[y=A\sin (\omega t+kx)\]
  done clear
  D)
   \[y=0.8A\sin (\omega t+kx)\]
  done clear
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• question_answer19) An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle, whose echo is heard by the driver after 5 s. If speed of sound in air is 330 m/s, the speed of engine is
  A)
   10 m/s
  done clear
  B)
   20 m/s          
  done clear
  C)
   30 m/s
  done clear
  D)
   40 m/s
  done clear
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• question_answer20) The graph between the resistive force F acting on a body and the distance covered by the body is shown in the figure. The mass of the body is 25 kg and initial velocity is 2 m/s. When the distance covered by the body is 4m, its kinetic energy would be
  A)
  \[10\,J\]
  done clear
  B)
   \[20\,J\]
  done clear
  C)
   \[40\,J\]
  done clear
  D)
   \[50\,J\]
  done clear
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• question_answer21) A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. The frictional force and normal reaction are
  A)
  \[2N,3N\]
  done clear
  B)
   \[5N,6N\]
  done clear
  C)
   \[10N,15N\]
  done clear
  D)
   \[20N,30N\]
  done clear
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• question_answer22) On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will  
  A)
   equilibrate the centripetal force
  done clear
  B)
   be vertical
  done clear
  C)
   be decreased
  done clear
  D)
   have a horizontal inward component
  done clear
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• question_answer23) The mass of the moon is \[\frac{1}{81}\] of the earth but the gravitational pull is \[\frac{1}{6}\] of the earth. It is due to  the fact that
  A)
   the radius of earth is \[\frac{9}{\sqrt{6}}\] of the moon
  done clear
  B)
   the radius of moon is \[\frac{81}{6}\] of the earth
  done clear
  C)
   moon is the satellite of the earth
  done clear
  D)
   None of the above
  done clear
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• question_answer24) Inertia is that property of a body by virtue of  which the body is
  A)
   unable to change by itself the state of uniform motion
  done clear
  B)
   unable to change by itself the state of rest and of uniform linear motion
  done clear
  C)
   unable to change by itself the state of rest
  done clear
  D)
   unable to change by itself the direction of motion
  done clear
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• question_answer25) The radius of two metallic spheres A and B are  \[{{r}_{1}}\]and \[{{r}_{2}}\]respectively \[({{r}_{1}}>{{r}_{2}}).\] They are connected by a thin wire and the system is given a certain charge. The charge will be greater
  A)
   equal on both
  done clear
  B)
   zero on both            
  done clear
  C)
   on the surface of sphere A
  done clear
  D)
   on the surface of sphere B
  done clear
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• question_answer26) The temperature gradient in a rod of 0.5 m long is \[80{{\,}^{o}}C/m.\] If the temperature of hotter end of the rod is \[30{{\,}^{o}}C,\] then the temperature of the cooler end is
  A)
  \[0{{\,}^{o}}C\]             
  done clear
  B)
  \[-10{{\,}^{o}}C\]
  done clear
  C)
  \[10{{\,}^{o}}C\]            
  done clear
  D)
  \[40{{\,}^{o}}C\]
  done clear
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• question_answer27) Time period of a block suspended from the upper plate of a parallel plate capacitor by a spring of stiflhess K is T, when block is uncharged. If a charge q is given to the block then, the new time period of oscillation will be
  A)
   T
  done clear
  B)
   \[>\,T\]
  done clear
  C)
   \[<\,\,T\]
  done clear
  D)
   \[\ge \,\,T\]
  done clear
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• question_answer28) In the circuit shown, potential difference between \[x\]and \[y\]will be
  A)
   Zero
  done clear
  B)
   120 V
  done clear
  C)
   60 V
  done clear
  D)
   20 V
  done clear
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• question_answer29) A wire of length 1 m is moving at a speed of \[2\,m{{s}^{-1}}\] perpendicular to its length in a homogeneous magnetic field of 0.5T. If the ends of the wire are joined to a circuit of resistance \[6\Omega ,\] then the rate at which work is being done to keep the wire moving at constant speed is
  A)
  \[1\,W\]
  done clear
  B)
   \[\frac{1}{3}\,W\]
  done clear
  C)
   \[\frac{1}{6}\,W\]
  done clear
  D)
   \[\frac{1}{12}\,W\]
  done clear
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• question_answer30) The transformation ratio in the step-up transformer is
  A)
   1
  done clear
  B)
   greater than one
  done clear
  C)
   less than one
  done clear
  D)
   the ratio greater or less than one depends on the other factors.
  done clear
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• question_answer31) The focal length of the objective of a terrestrial telescope is 80 cm and it is adjusted for parallel rays, then its power is 20. If the focal length of erecting lens is 20 cm, then full length of the telescope will be
  A)
   164 cm        
  done clear
  B)
   124 cm
  done clear
  C)
   100 cm        
  done clear
  D)
   84 cm
  done clear
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• question_answer32) Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam
  A)
  \[{{15}^{o}}\]
  done clear
  B)
   \[{{35}^{o}}\]
  done clear
  C)
   \[{{55}^{o}}\]
  done clear
  D)
   \[{{75}^{o}}\]
  done clear
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• question_answer33) The ratio of two specific heats of gas \[{{C}_{p}}/{{C}_{V}}\]for argon is 1.6 and for hydrogen is 1.4. If adiabatic elasticity of argon at pressure p is E, then at what pressure the adiabatic elasticity of hydrogen will also be equal to E?
  A)
   p
  done clear
  B)
   1.4 p
  done clear
  C)
   \[\frac{7}{8}p\]
  done clear
  D)
   \[\frac{8}{7}p\]
  done clear
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• question_answer34) The stress-strain curves for three wires of different materials are shown in figure, where P, Q and R are the elastic limits of the wires.  He figure shows that
  A)
   elasticity of wire P is maximum
  done clear
  B)
   elasticity of wire Q is maximum
  done clear
  C)
   elasticity of wire R is maximum
  done clear
  D)
   None of the above is true
  done clear
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• question_answer35) A body of density \[{{d}_{1}}\]is counterpoised by Mg of weights of density \[{{d}_{2}}\]in air of density d. Then, the true mass of the body is
  A)
   M
  done clear
  B)
   \[\frac{M(1-d/{{d}_{2}})}{(1-d/{{d}_{1}})}\]
  done clear
  C)
   \[M\left( 1-\frac{d}{{{d}_{2}}} \right)\]
  done clear
  D)
   \[M\left( 1-\frac{d}{{{d}_{1}}} \right)\]
  done clear
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• question_answer36) According to kinetic theory of gases, total energy of a gas is equal to
  A)
   potential energy
  done clear
  B)
   kinetic energy
  done clear
  C)
   both [a] and [b]
  done clear
  D)
   None of the above
  done clear
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• question_answer37) A dip needle lies initially in the magnetic meridian when it shows an angle of dip \[\theta \] at a place. The dip circle is rotated through an angle \[x\]in the horizontal plane and then it shows an angle of dip\[\theta \]. Then, \[\frac{\tan \theta }{\tan \theta }\]will be
  A)
   \[\cos x\]
  done clear
  B)
   \[\frac{1}{\cos x}\]
  done clear
  C)
   \[\frac{1}{\sin x}\]
  done clear
  D)
   \[\frac{1}{\tan x}\]
  done clear
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• question_answer38) The rms current in an AC circuit is 2 A. If the wattless current be\[\sqrt{3}A,\] what is the power factor of the circuit?
  A)
   \[\frac{1}{2}\]
  done clear
  B)
   \[\frac{1}{3}\]
  done clear
  C)
   \[\frac{1}{\sqrt{3}}\]
  done clear
  D)
   \[\frac{1}{\sqrt{2}}\]
  done clear
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• question_answer39) An electric bulb rated as 500W - 100V is used in a circuit having 200 V supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 W is
  A)
  \[100\Omega \]           
  done clear
  B)
  \[50\Omega \]
  done clear
  C)
  \[20\Omega \]             
  done clear
  D)
  \[10\Omega \]
  done clear
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• question_answer40) A string of length L and mass M hangs freely from a fixed point. Then, the velocity of transverse waves along the string at a distance \[x\]from the free end is
  A)
  \[gx\]
  done clear
  B)
  \[\sqrt{gx}\]
  done clear
  C)
   \[gL\]
  done clear
  D)
   \[\sqrt{gL}\]
  done clear
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• question_answer41) Two equal masses each of 2 kg are suspended from a spring balance as shown in figure. The reading of the spring balance will be
  A)
   Zero
  done clear
  B)
   2 kg
  done clear
  C)
   4 kg
  done clear
  D)
   between zero and 2 kg
  done clear
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• question_answer42) A body of mass 2 kg slides down a curve track which is quadrant of a circle of radius 1 m as shown in figure. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is
  A)
  \[2\,m{{s}^{-1}}\]
  done clear
  B)
   \[0.5\,m{{s}^{-1}}\]
  done clear
  C)
   \[19.6\,m{{s}^{-1}}\]
  done clear
  D)
   \[4.43\,m{{s}^{-1}}\]
  done clear
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• question_answer43) For the circuit shown in figure,
  A)
   resistance \[R=46\Omega \]
  done clear
  B)
   current through \[20\Omega \] resistance is 0.1A
  done clear
  C)
   potential difference across the mi resistance is 2V
  done clear
  D)
   All of the above are true
  done clear
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• question_answer44) If 10000 V is applied across an X-ray tube, what will be the ratio of de-Broglie wavelength of incident electrons to the shortest wavelength X-ray produced? \[\left( \frac{e}{m}\text{for}\,\text{electron}\,=1.8\times {{10}^{11}}C\,k{{g}^{-1}} \right)\]
  A)
   0.1
  done clear
  B)
   0.2
  done clear
  C)
   0.3
  done clear
  D)
   1.0
  done clear
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• question_answer45) A water drop in air reflects the light rays as
  A)
  
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
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• question_answer46) Two capillary tubes of  same radius r but of lengths \[{{l}_{1}}\]and \[{{l}_{2}}\] are fitted in parallel to the bottom of a vessel. The pressure head is p.  What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
  A)
   \[{{l}_{1}}+{{l}_{2}}\]
  done clear
  B)
   \[\frac{{{l}_{1}}{{l}_{2}}}{{{l}_{1}}+{{l}_{2}}}\]
  done clear
  C)
   \[\frac{1}{{{l}_{1}}+{{l}_{2}}}\]
  done clear
  D)
   \[\frac{1}{{{l}_{1}}}+\frac{1}{{{l}_{2}}}\]
  done clear
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• question_answer47) An ideal thermometer should have
  A)
   small heat capacity
  done clear
  B)
   large heat capacity
  done clear
  C)
   medium heat capacity
  done clear
  D)
   variable heat capacity
  done clear
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• question_answer48) For the circuit shown in figure, the impedance of the circuit will be
  A)
  \[50\Omega \]
  done clear
  B)
   \[60\Omega \]
  done clear
  C)
   \[90\Omega \]
  done clear
  D)
   \[120\Omega \]
  done clear
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• question_answer49) An optical fibre communication system works on a wavelength of 1.3 um The number of subscribers if can feed if a channel requires 20 kHz are
  A)
  \[1\times {{10}^{5}}\]
  done clear
  B)
   \[2.3\times {{10}^{10}}\]
  done clear
  C)
   \[1.15\times {{10}^{10}}\]
  done clear
  D)
   None of these
  done clear
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• question_answer50) A system of logic gates is shown in the figure. From the study of truth table it can be found that to produce a high output (1) at R, we must have
  A)
  \[X=0,\,Y=1\]
  done clear
  B)
   \[X=1,\,Y=1\]
  done clear
  C)
   \[X=1,\,Y=0\]
  done clear
  D)
   \[X=0,\,Y=0\]
  done clear
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• question_answer51) The reagent commonly used to determine hardness of water titrimetrically is
  A)
   oxalic acid
  done clear
  B)
   disodium salt of EDTA
  done clear
  C)
   sodium citrate
  done clear
  D)
   sodium thiosulphate
  done clear
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• question_answer52) In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is
  A)
   interstitial defect            
  done clear
  B)
   vacancy defect
  done clear
  C)
   Frenkel defect
  done clear
  D)
   Schottky defect                        
  done clear
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• question_answer53) The molarity of a solution obtained by mixing 800 m£ of 0.5 M HCl with 200 mL of 1 M HCl will be                             
  A)
   0.8M           
  done clear
  B)
   0.6M
  done clear
  C)
   0.4 M
  done clear
  D)
   0.2M
  done clear
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• question_answer54) A   solution   of sucrose (molar  \[\text{mass}=342\,\text{g}\,\text{mo}{{\text{l}}^{-1}}\]) has been prepared by  dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of solution obtained will be (\[{{k}_{f}}\]for water\[=\text{1}\text{.86}\,\text{K}\,\text{kg}\,\text{mo}{{\text{l}}^{-1}}\])
  A)
  \[-\text{ }0.570{{\,}^{o}}C\]    
  done clear
  B)
  \[~-0.372{{\,}^{o}}C\]
  done clear
  C)
  \[~-0.520{{\,}^{o}}C\]
  done clear
  D)
  \[~+\,0.372{{\,}^{o}}C\]
  done clear
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• question_answer55) The standard electrode potential of three  metals X, Y and Z are \[\text{1}\text{.2 V,}\,\text{+}\,\,\text{0}\text{.5 V}\]and \[-\text{ 3}\text{.0}\,\text{V}\]respectively. The reducing power of these metals will be
  A)
  \[X>Y>Z\]            
  done clear
  B)
  \[~Y>Z>X\]
  done clear
  C)
  \[~Y>X>Z\]
  done clear
  D)
  \[~Z>X>Y\]
  done clear
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• question_answer56) The resistance of 1 N solution of acetic acid is \[250\Omega ,\]when measured in a cell having a cell constant of \[\text{1}\text{.15}\,\text{c}{{\text{m}}^{-1}}.\]The equivalent  conductance \[({{\Omega }^{-1}}c{{m}^{2}}\,\text{equi}{{\text{v}}^{-1}})\] of 1 N acetic acid is    
  A)
   2.3                
  done clear
  B)
   4.6
  done clear
  C)
   9.2               
  done clear
  D)
   18.4
  done clear
  View Answer play_arrow

• question_answer57) The thermal decomposition of a molecule shows first order kinetics. The molecule decomposes 50% in 120 min. How much time it will take to decompose 90%?
  A)
   300 min
  done clear
  B)
   360 min
  done clear
  C)
   398.8 min
  done clear
  D)
   400 min
  done clear
  View Answer play_arrow

• question_answer58) In the respect of the equation, \[k=A{{e}^{-Ea/RT}}\]in chemical kinetics, which one of the following statement is correct?
  A)
   k is equilibrium constant
  done clear
  B)
   A is adsorption factor
  done clear
  C)
   \[{{E}_{{}}}\]is activation energy
  done clear
  D)
   R is Rydberg constant
  done clear
  View Answer play_arrow

• question_answer59) What is the name of a phenomenon in which both adsorption and absorption takes places?
  A)
   Chemisorption
  done clear
  B)
   Physisorption
  done clear
  C)
   Desorption
  done clear
  D)
   Sprption
  done clear
  View Answer play_arrow

• question_answer60) Colloidal solutions of gold, prepared by different methods are of different colours because of
  A)
   variable valency of gold
  done clear
  B)
   different concentration of gold particles
  done clear
  C)
   impurities produced by different methods
  done clear
  D)
   different diameters of colloidal gold particles
  done clear
  View Answer play_arrow

• question_answer61) The most important ore of tin is
  A)
   cassiterite
  done clear
  B)
   cryolite
  done clear
  C)
   cerussite
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer62) Which process of purifications is represented by the following scheme? \[\underset{impure}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow{250{{\,}^{o}}C}Ti{{I}_{4}}\xrightarrow{1400{{\,}^{o}}C}\underset{Pure}{\mathop{Ti}}\,+2{{I}_{2}}\]
  A)
   Cupellation
  done clear
  B)
   Zone refining
  done clear
  C)
   van-Arkel process
  done clear
  D)
   Poling
  done clear
  View Answer play_arrow

• question_answer63) If the supply of oxygen is limited, \[{{\text{H}}_{\text{2}}}\text{S}\]reacts with \[{{\text{O}}_{2}}\] to form
  A)
  \[{{H}_{2}}O+S{{O}_{3}}\]
  done clear
  B)
   \[{{H}_{2}}O+S\]
  done clear
  C)
   \[{{H}_{2}}S{{O}_{4}}+S\]
  done clear
  D)
   \[{{H}_{2}}O+S{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer64) Which two of the following salts are used for preparing iodised salt? (i) \[KI{{O}_{3}}\] (ii) \[KI\] (iii) \[{{I}_{2}}\] (iv) \[HI\]
  A)
   I, II
  done clear
  B)
   I, III
  done clear
  C)
   II, IV
  done clear
  D)
   III, IV
  done clear
  View Answer play_arrow

• question_answer65) Ammonia will not form complex with
  A)
  \[A{{g}^{2+}}\]
  done clear
  B)
   \[P{{b}^{2+}}\]
  done clear
  C)
   \[C{{u}^{2+}}\]
  done clear
  D)
   \[C{{d}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer66) The magnetic moment of a transition metal ion is \[\sqrt{15}\,BM.\]Therefore, the number of unpaired electrons present in it is
  A)
   4               
  done clear
  B)
   1
  done clear
  C)
   2               
  done clear
  D)
   3
  done clear
  View Answer play_arrow

• question_answer67) \[\text{C}{{\text{e}}^{\text{4+}}}\]is stable. This is because
  A)
   half-filled d-orbitals
  done clear
  B)
   all paired electrons in d-orbitals
  done clear
  C)
   empty d-orbitals
  done clear
  D)
   fully filled d-orbitals
  done clear
  View Answer play_arrow

• question_answer68) \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]N{{O}_{2}}\] and\[[Co{{(N{{H}_{3}})}_{4}}ClN{{O}_{2}}]Cl\] exhibit which type is isomerism?
  A)
   Geometrical
  done clear
  B)
   Optical
  done clear
  C)
   Linkage
  done clear
  D)
   lonisation
  done clear
  View Answer play_arrow

• question_answer69) The \[\pi -\]bonded organometallic compound  which has ethene as one of its component is
  A)
   Zeises salt
  done clear
  B)
   ferrocene
  done clear
  C)
   dibenzene chromium
  done clear
  D)
   tetraethyltin
  done clear
  View Answer play_arrow

• question_answer70) Alcoholic KOH is used for
  A)
   dehydration            
  done clear
  B)
   dehydrogenation        
  done clear
  C)
   dehydrohalogenation
  done clear
  D)
   dehalogenation
  done clear
  View Answer play_arrow

• question_answer71) Freon used as refrigerant is
  A)
  \[C{{F}_{2}}=C{{F}_{2}}\]
  done clear
  B)
   \[C{{H}_{2}}{{F}_{2}}\]
  done clear
  C)
   \[CC{{l}_{2}}{{F}_{2}}\]
  done clear
  D)
   \[C{{F}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer72) Which of the following reacts fastly with Na?
  A)
   \[{{1}^{o}}\]alcohol
  done clear
  B)
   \[{{2}^{o}}\]alcoholo
  done clear
  C)
   \[{{3}^{o}}\]3° alcohol
  done clear
  D)
   The reactivity of all is equal
  done clear
  View Answer play_arrow

• question_answer73) Consider the following reaction \[\text{Phenol}\xrightarrow{\text{Zn}\,\text{dust}}X\xrightarrow[\text{anhy}\,\text{AlC}{{\text{l}}_{\text{3}}}]{\text{C}{{\text{H}}_{\text{3}}}\text{cl}}Y\] \[\xrightarrow{\text{alk}\,\text{KMn}{{\text{O}}_{\text{4}}}}\text{Z}\] The product Z is
  A)
   toluene          
  done clear
  B)
   benzaldehyde
  done clear
  C)
   benzoic acid      
  done clear
  D)
   benzene
  done clear
  View Answer play_arrow

• question_answer74) The formula of chloral is           
  A)
  \[CHC{{l}_{3}}\]
  done clear
  B)
   \[C{{H}_{2}}ClCHO\]
  done clear
  C)
   \[CC{{l}_{3}}CHO\]
  done clear
  D)
   \[CHC{{l}_{2}}CHO\]
  done clear
  View Answer play_arrow

• question_answer75) One of the following named reaction is an example of disproportionation  reaction. Identify it
  A)
   Birch reduction
  done clear
  B)
   Aldol condensation
  done clear
  C)
   Reimer-Tiemann reaction
  done clear
  D)
   Cannizaro reaction
  done clear
  View Answer play_arrow

• question_answer76) Calcium formate on dry heating yields
  A)
   acetone        
  done clear
  B)
   formaldehyde
  done clear
  C)
   acetic acid       
  done clear
  D)
   acetaldehyde
  done clear
  View Answer play_arrow

• question_answer77) Which amongst the following is the most stable carbocation?
  A)
   \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{+}{\mathop{C}}}\,}}\,-H\]
  done clear
  B)
   \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{{{C}^{+}}}}}\,}}}\,\]
  done clear
  C)
   \[\overset{+}{\mathop{C}}\,{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer78) At\[25{{\,}^{o}}C,\] the dissociation constant of a base, BOH, is \[1.0\times {{10}^{-12}}.\]The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be
  A)
  \[2.0\times {{10}^{-6}}mol\,{{L}^{-1}}\]
  done clear
  B)
   \[1.0\times {{10}^{-5}}mol\,{{L}^{-1}}\]
  done clear
  C)
   \[1.0\times {{10}^{-6}}mol\,{{L}^{-1}}\]
  done clear
  D)
   \[1.0\times {{10}^{-7}}mol\,{{L}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer79) Which one of the following pairs represents stereoisomerism?
  A)
   Chain isomerism and rotational isomerism
  done clear
  B)
   Structural isomerism and geometric isomerism
  done clear
  C)
   Linkage   isomerism   and   geometric isomerism
  done clear
  D)
   Optical   isomerism   and   geometric isomerism
  done clear
  View Answer play_arrow

• question_answer80) Aniline in a set of reactions yielded a product. The structure of the product D would be
  A)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\]
  done clear
  B)
   \[{{C}_{6}}{{H}_{5}}NHC{{H}_{2}}C{{H}_{3}}\]
  done clear
  C)
   \[{{C}_{6}}{{H}_{5}}NHOH\]
  done clear
  D)
   \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]
  done clear
  View Answer play_arrow

• question_answer81) The correct order in which the \[\text{o}-\text{o}\]bond length increases in the following is
  A)
  \[{{H}_{2}}{{O}_{2}}<{{O}_{2}}<{{O}_{3}}\]
  done clear
  B)
   \[{{O}_{3}}<{{H}_{2}}{{O}_{2}}<{{O}_{2}}\]
  done clear
  C)
   \[{{O}_{2}}<{{O}_{3}}<{{H}_{2}}{{O}_{2}}\]
  done clear
  D)
   \[{{O}_{2}}<{{H}_{2}}{{O}_{2}}<{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer82) The mass of carbon anode consumed (giving  only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic mass Al= 27)
  A)
   180 kg
  done clear
  B)
   270 kg
  done clear
  C)
   540 kg
  done clear
  D)
   90 kg
  done clear
  View Answer play_arrow

• question_answer83) The number of moles of \[\text{KMn}{{\text{O}}_{\text{4}}}\]reduced by one mole of KI in alkaline medium is
  A)
   one fifth        
  done clear
  B)
   five
  done clear
  C)
   one
  done clear
  D)
   two
  done clear
  View Answer play_arrow

• question_answer84) Which of the following molecules has trigonal planar geometry?
  A)
  \[I{{F}_{3}}\]
  done clear
  B)
   \[PC{{l}_{3}}\]
  done clear
  C)
  \[N{{H}_{3}}\]
  done clear
  D)
  \[B{{F}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer85) Which one of the following forms micelles in aqueous solution above certain concentration?
  A)
   Urea
  done clear
  B)
   Dodecyl trimethyl ammonium chloride
  done clear
  C)
   Pyridinium chloride
  done clear
  D)
   Glucose
  done clear
  View Answer play_arrow

• question_answer86) A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three \[\alpha -\]particles in succession. The group of the periodic table to which the resulting daughter element would belong is
  A)
   group 14
  done clear
  B)
   group 16
  done clear
  C)
   group 4    
  done clear
  D)
   group 6                
  done clear
  View Answer play_arrow

• question_answer87) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?
  A)
   Exothermic and decreasing disorder
  done clear
  B)
   Endothermic and increasing disorder
  done clear
  C)
   Exothermic and increasing disorder
  done clear
  D)
   Endothermic and decreasing disorder
  done clear
  View Answer play_arrow

• question_answer88) The monomer of the polymer
  A)
   
  done clear
  B)
   \[{{(C{{H}_{3}})}_{2}}C=C{{(C{{H}_{3}})}_{2}}\]
  done clear
  C)
   \[C{{H}_{3}}CH=CH.C{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{3}}CH=C{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer89) The correct sequence of increasing covalent character is represented by
  A)
  \[LiCl<NaCl<BeC{{l}_{2}}\]
  done clear
  B)
   \[BeC{{l}_{2}}<NaCl<LiCl\]
  done clear
  C)
   \[NaCl<LiCl<BeC{{l}_{2}}\]
  done clear
  D)
   \[BeC{{l}_{2}}<LiCl<NaCl\]
  done clear
  View Answer play_arrow

• question_answer90) \[{{\text{H}}_{\text{2}}}\text{S}\]gas when passed through a solution of cations containing HCT precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because
  A)
   presence of \[\text{HCl}\]decreases the sulphide ion concentration
  done clear
  B)
   presence of\[\text{HCl}\] increases the sulphide ion concentration
  done clear
  C)
   solubility product of group II sulphides is more than that of group IV sulphides
  done clear
  D)
   sulphides of group IV cations are. Unstable in \[\text{HCl}\]
  done clear
  View Answer play_arrow

• question_answer91) The energy of second Bohr orbit of the hydrogen atom is \[-\,328\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}};\] hence the energy of fourth Bohr orbit would be
  A)
  \[-\,41\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]
  done clear
  B)
   \[-1312\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]
  done clear
  C)
   \[-164\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]
  done clear
  D)
   \[-82\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer92) Equilibrium constants \[{{K}_{1}}\]and \[{{K}_{2}}\]for the following equilibria \[NO(g)+\frac{1}{2}{{O}_{2}}N{{O}_{2}}(g)\] and \[2N{{O}_{2}}(g)2NO(g)+{{O}_{2}}(g)\]are related as
  A)
   \[{{K}_{2}}=\frac{1}{{{K}_{1}}}\]
  done clear
  B)
   \[{{K}_{2}}={{K}_{1}}^{2}\]
  done clear
  C)
   \[{{K}_{2}}=\frac{{{K}_{1}}}{2}\]
  done clear
  D)
   \[{{K}_{2}}=\frac{1}{={{K}_{1}}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer93) Names of some compounds are given. Which one is not correct in IUPAC system?
  A)
  \[\underset{3-\text{methyl}-2-\text{butanol}}{\mathop{C{{H}_{3}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,\]
  done clear
  B)
   \[\underset{4-\text{methyl}-2-\text{pentyne}}{\mathop{C{{H}_{3}}-C{{H}_{2}}\equiv C}}\,-CH{{(C{{H}_{3}})}_{2}}\]
  done clear
  C)
   \[\underset{2-\text{ethyl}-3-\text{methyl}-\text{but}-1-\text{ene}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{2}}}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,\]
  done clear
  D)
   \[\underset{3-\text{methyl}-4-\text{ethyl}\,\text{heptane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{C{{H}_{2}}C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H}}\,}}\,-C{{H}_{2}}C{{H}_{3}}}}\,\]
  done clear
  View Answer play_arrow

• question_answer94) 10g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount to  water produced in this reaction will be
  A)
   3mol
  done clear
  B)
   4mol
  done clear
  C)
   1 mol
  done clear
  D)
   2mol
  done clear
  View Answer play_arrow

• question_answer95) Dominance of strong repulsive forces among  the molecules of the gas (Z = compressibility factor)
  A)
   depends on Z and indicated by Z= 1
  done clear
  B)
   depends on Z and indicated by Z > 1
  done clear
  C)
   depends on Z and indicated by Z < 1
  done clear
  D)
   is independent of Z
  done clear
  View Answer play_arrow

• question_answer96) When glucose reacts with bromine water, the main product is
  A)
   acetic acid        
  done clear
  B)
   saccharic acid
  done clear
  C)
   glyceraldehyde   
  done clear
  D)
   gluconic acid
  done clear
  View Answer play_arrow

• question_answer97) Protein present in hair is
  A)
   albumin         
  done clear
  B)
   globulin
  done clear
  C)
   keratin           
  done clear
  D)
   chromoprotein
  done clear
  View Answer play_arrow

• question_answer98) The hydrolysis of 2-bromo-3-methyl butane by \[{{S}_{N}}1\]mechanism gives mainly
  A)
   3-methl-2-butanol
  done clear
  B)
   2-methyl-2-butanol
  done clear
  C)
   2,2-dimethyl-l-propanol
  done clear
  D)
   2 methyl- 1-butanol
  done clear
  View Answer play_arrow

• question_answer99)  The pH value of an acid is 5 and its concentration is 1 M. What is the value of \[{{K}_{a}}\]for the acid?
  A)
  \[{{10}^{-7}}\]
  done clear
  B)
   \[{{10}^{-5}}\]
  done clear
  C)
   \[{{10}^{-10}}\]
  done clear
  D)
   \[{{10}^{-8}}\]
  done clear
  View Answer play_arrow

• question_answer100) If 1 mole of an ideal gas expands isothermally at \[37{{\,}^{o}}C\]from 15 L to 25 L, the maximum work obtained is
  A)
   12.87 J
  done clear
  B)
   6.43 J
  done clear
  C)
   8.57 J
  done clear
  D)
   2.92 J      
  done clear
  View Answer play_arrow

• question_answer101) Term New Systematics was given by
  A)
   Julian Huxley
  done clear
  B)
   Bateson
  done clear
  C)
   Linnaeus
  done clear
  D)
   Darwin
  done clear
  View Answer play_arrow

• question_answer102) Lysozyme that is present in saliva and tears destroys
  A)
   certain fungi
  done clear
  B)
   certain types of bacteria
  done clear
  C)
   all viruses
  done clear
  D)
   most virus infected cells
  done clear
  View Answer play_arrow

• question_answer103) infectious proteins are present in
  A)
   gemini viruses  
  done clear
  B)
   prions
  done clear
  C)
   viroids
  done clear
  D)
   satellite viruses
  done clear
  View Answer play_arrow

• question_answer104) Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?
  A)
   5
  done clear
  B)
   10
  done clear
  C)
   20
  done clear
  D)
   40
  done clear
  View Answer play_arrow

• question_answer105) Which one of the following plants functions as Symbolic nitrogen-fixing plant?
  A)
   Azolla
  done clear
  B)
   Cycas
  done clear
  C)
   Moss
  done clear
  D)
   Marchantia
  done clear
  View Answer play_arrow

• question_answer106) Symmetry in Cnidaria is         
  A)
   radial
  done clear
  B)
   bilateral
  done clear
  C)
   pentamerous
  done clear
  D)
   spherical
  done clear
  View Answer play_arrow

• question_answer107) The young one of cockroach is called
  A)
   caterpillar
  done clear
  B)
   nymph
  done clear
  C)
   fingerling
  done clear
  D)
   maggot
  done clear
  View Answer play_arrow

• question_answer108) Pecten, a comb-like structure is found in the eye of
  A)
   fishes
  done clear
  B)
   frogs
  done clear
  C)
   birds
  done clear
  D)
   mammals
  done clear
  View Answer play_arrow

• question_answer109) The inflorescence in Ocimum is
  A)
   cyathium
  done clear
  B)
   verticillaster
  done clear
  C)
   hypanthodium
  done clear
  D)
   raceme
  done clear
  View Answer play_arrow

• question_answer110) Drupes are called stony fruits because they have hard
  A)
   epicarp and mesoc
  done clear
  B)
   mesocarp
  done clear
  C)
   epicarp
  done clear
  D)
   endocarp
  done clear
  View Answer play_arrow

• question_answer111) Examples for lateral meristems are
  A)
   phellogen and procambium
  done clear
  B)
   fascicular cambium and procambium
  done clear
  C)
   procambium and dermatogen
  done clear
  D)
   fascicular cambium and cork cambium
  done clear
  View Answer play_arrow

• question_answer112) The type of tissue lining the nasal passage, bronchioles and fallopian tubes is
  A)
   columnar ciliated epithelium
  done clear
  B)
   cuboidal epithelium
  done clear
  C)
   neurosensory epithelium
  done clear
  D)
   germinal epithelium
  done clear
  View Answer play_arrow

• question_answer113) The blood does not clot inside the body because of 
  A)
   oxygenation of blood
  done clear
  B)
   movement of blood
  done clear
  C)
   Heparin in blood
  done clear
  D)
   absence of fibrinogen in blood
  done clear
  View Answer play_arrow

• question_answer114) The number of mitotic cell divisions required to produce 256 cells from single cell would be
  A)
   10
  done clear
  B)
   12
  done clear
  C)
   6
  done clear
  D)
   8
  done clear
  View Answer play_arrow

• question_answer115) Which of the following radioisotope is not suitable for DNA labelling based studies?
  A)
   \[{{H}^{3}}\]
  done clear
  B)
   \[{{P}^{32}}\]
  done clear
  C)
   \[{{N}^{15}}\]
  done clear
  D)
   \[{{S}^{35}}\]
  done clear
  View Answer play_arrow

• question_answer116) Plasmolysis is the result of
  A)
   exosmosis
  done clear
  B)
   endosmosis
  done clear
  C)
   reverse osmosis
  done clear
  D)
   diffusion
  done clear
  View Answer play_arrow

• question_answer117) Which element is required for the germination of pollen grains?
  A)
   Boron
  done clear
  B)
   Calcium
  done clear
  C)
   Chlorine             
  done clear
  D)
   Potassium
  done clear
  View Answer play_arrow

• question_answer118) The mechanism of ATP formation both in chloroplast and mitochondria is explained by
  A)
   relay pump theory of Godlewski
  done clear
  B)
   Cholodny-Wents model
  done clear
  C)
   chemiosmotic theory
  done clear
  D)
   Munchs mass-flow hypothesis
  done clear
  View Answer play_arrow

• question_answer119) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytpsol in prokaryotes. This enzyme is
  A)
   lactate dehydrogenase
  done clear
  B)
   isocitrate dehydrogenase
  done clear
  C)
   malate dehydrogenase
  done clear
  D)
   succinate dehydrogenase
  done clear
  View Answer play_arrow

• question_answer120) Which of the following movements in plants is due to the increased concentration of auxin?
  A)
   Movement of short towards the source of light
  done clear
  B)
   Nyctinasty
  done clear
  C)
   Movement of sunflower towards sun
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer121) Vitamin-K deficiency causes
  A)
   scurvy
  done clear
  B)
   xerophthalmia
  done clear
  C)
   bleeding
  done clear
  D)
   osteomalacja
  done clear
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• question_answer122) Thiamine (vitamin\[-{{\text{B}}_{\text{1}}}\]) deficiency results in
  A)
   Wernickes syndrome
  done clear
  B)
   Korsakoffs syndrome
  done clear
  C)
   osteonecrosis
  done clear
  D)
   tunnel vision
  done clear
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• question_answer123) Left shift of oxyhaemoglobin curve is noticed under
  A)
   normal temperature and pH
  done clear
  B)
   low temperature and high pH
  done clear
  C)
   low pH and high temperature
  done clear
  D)
  low pH and low temperature
  done clear
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• question_answer124) How many double circulations are normally completed by the human heart, in one minute?
  A)
   Eight
  done clear
  B)
   Sixteen
  done clear
  C)
   Seventy two
  done clear
  D)
   Thirty six
  done clear
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• question_answer125) If Henles loop were absent from mammalian nephron, which of the following is to be expected?
  A)
   The urine will be more concentrated
  done clear
  B)
   The urine will be more dilute
  done clear
  C)
   There will be no urine formation
  done clear
  D)
   There will be hardly any change in the quality and quantity of urine formed
  done clear
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• question_answer126) Matrix of bone is composed of
  A)
   chondrin
  done clear
  B)
   ossein
  done clear
  C)
   osteon
  done clear
  D)
   auxin
  done clear
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• question_answer127) Choose the correct non-protein ammo acid from the given option.
  A)
   Hydroxyproline
  done clear
  B)
   Hydroxylysine
  done clear
  C)
   Cystine
  done clear
  D)
   y-amino butyric add
  done clear
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• question_answer128) If the pituitary gland of an adult rat is surgically. removed, which of the following endocrine glands will be less affected?
  A)
   Adrenal cortex
  done clear
  B)
   Adrenal medulla
  done clear
  C)
   Thyroid                         
  done clear
  D)
   Gonads
  done clear
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• question_answer129) Different colours of frogs skin are controlled by
  A)
   hormones
  done clear
  B)
   melanocytes
  done clear
  C)
   nervous system
  done clear
  D)
   Both [a] and [c]
  done clear
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• question_answer130) Which one of the following pairs of plant structures   has   haploid   number   of chromosomes?
  A)
   Megaspore mother cell and antipodal cells
  done clear
  B)
   Egg cell and antipodal cells
  done clear
  C)
   Nucellus and antipodal cells.
  done clear
  D)
   Egg nucleus and secondary nucleus
  done clear
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• question_answer131) Which is present in male rabbit but not present in female rabbit?
  A)
   Urethra
  done clear
  B)
   Vagina
  done clear
  C)
   Uterus
  done clear
  D)
   Vas deferens
  done clear
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• question_answer132) Which one of the following is the most likely reason of not occurring regular menstruation cycle in females?
  A)
   Fertilization of the ovum
  done clear
  B)
   Maintenance   of the   hypertrophical endometrial lining
  done clear
  C)
   Maintenance of high concentration of sex-hormones in the blood stream
  done clear
  D)
   Retention of well-developed corpus luteum
  done clear
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• question_answer133) Mating of an organisms to a double recessive in order to determine whether it is homozygous or heterozygous   for   a character  under consideration, is called
  A)
   reciprocal cross
  done clear
  B)
   test cross
  done clear
  C)
   dihybrid cross
  done clear
  D)
   back cross
  done clear
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• question_answer134) In which mode of inheritance, do you expect more maternal influence among the off springs?
  A)
   Autosomal
  done clear
  B)
   Cytoplasmic
  done clear
  C)
   Y-linked
  done clear
  D)
   X-linked
  done clear
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• question_answer135) Cri-du-chat syndrome in humans is caused by the
  A)
   fertilization of on XX egg by a normal Y-bearin sperm
  done clear
  B)
   loss of half of the short arm of chromosome 5.               
  done clear
  C)
   loss of half of the long arm of chromosome 5
  done clear
  D)
   trisomy of 21st chromosome   
  done clear
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• question_answer136) Operon concept was proposed by
  A)
   Jacob and Monod
  done clear
  B)
   David Baltimore
  done clear
  C)
   Allec Jeffery
  done clear
  D)
   None of the above
  done clear
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• question_answer137) Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters, this theory is known as
  A)
   theory of inheritance of acquired characters
  done clear
  B)
   theory germplasm
  done clear
  C)
   Both [a] and [b]
  done clear
  D)
   theory of natural selection
  done clear
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• question_answer138) Darwins finches provide an excellent evidence in favour of organic evolution. These are related to which of the following evidences?
  A)
   Embryology
  done clear
  B)
   Palaeontology (or fossils)
  done clear
  C)
   Anatomy
  done clear
  D)
   Biogeography (or geographic distribution)
  done clear
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• question_answer139) How does antigen-determinant differ from antigen binding site?
  A)
   By its structure
  done clear
  B)
   By its location
  done clear
  C)
   By its function
  done clear
  D)
   All of these
  done clear
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• question_answer140) In ultrasonography
  A)
   antigen-antibody Interactions occur
  done clear
  B)
   high frequency sound waves are used
  done clear
  C)
   magnetic waves are used
  done clear
  D)
   None of the above
  done clear
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• question_answer141) Which of the following can be controlled by using biopesticides?
  A)
   Insects
  done clear
  B)
   Diseases
  done clear
  C)
   Weeds
  done clear
  D)
   All of these
  done clear
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• question_answer142) Percentage composition of fibroin and sericin in silk is
  A)
   50:40
  done clear
  B)
   80:20
  done clear
  C)
   30:70
  done clear
  D)
   40:60
  done clear
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• question_answer143) The niche of a population is defined as
  A)
   set of condition that interacts
  done clear
  B)
   place where it lives
  done clear
  C)
   set of conditions and resources it uses
  done clear
  D)
   geographical area that it covers
  done clear
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• question_answer144) Peacock eats a snake and snake eats frog and frog eats insect, while insect eats green plant, then position of peacock is
  A)
   primary producer
  done clear
  B)
   secondary producer
  done clear
  C)
   decomposer
  done clear
  D)
   top at the apex of food pyramid
  done clear
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• question_answer145) In this soil conservation method, several parts  of grasses are left out in soil after the crop is harvested
  A)
   contour farming
  done clear
  B)
   terrace farming
  done clear
  C)
   tillage
  done clear
  D)
   crop rotation
  done clear
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• question_answer146) Which one of the following shows maximum genetic diversity in India?
  A)
   Rice
  done clear
  B)
   Maize
  done clear
  C)
   Mango
  done clear
  D)
   Groundnut
  done clear
  View Answer play_arrow

• question_answer147) Ozone is spread in the swimming pool because
  A)
   it acts as disinfectant
  done clear
  B)
   to absorbs UV radiations
  done clear
  C)
   ozone is easily available from \[{{\text{O}}_{\text{2}}}\]
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer148) 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_answer149) Which one of the following palindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzyme?
  A)
  \[5-CGTTCG-3\] \[3-ATCGTA-5\]
  done clear
  B)
   \[5-GATATG-3\] \[3-CTACTA-5\]
  done clear
  C)
   \[5-GAATTC-3\] \[3-CTTAAG-5\]
  done clear
  D)
   \[5-CACGTA-3\] \[3-CTCAGT-5\]
  done clear
  View Answer play_arrow

• question_answer150) Which one of the following bacterium is used for production of transgenic plants?
  A)
   Escherichia coli
  done clear
  B)
   Bacillus thuringiensis
  done clear
  C)
   Staphylococcus aureus
  done clear
  D)
   Agrobacterium tumefaciens
  done clear
  View Answer play_arrow