Solved papers for JCECE Medical JCECE Medical Solved Paper-2015

done JCECE Medical Solved Paper-2015 Total Questions - 150

• question_answer1) A vector of magnitude \[|\psi |\] is turned through angle \[\frac{\text{o }\!\!|\!\!\text{ }}{2}.\] The magnitude of change in the vector is given by
  A)
   \[2|\psi ||cos\,o|/4|\]
  done clear
  B)
   \[|\psi ||sino|/4|\]
  done clear
  C)
   \[|\psi {{|}^{2}}|sino|/4{{|}^{2}}\]
  done clear
  D)
   \[2|\psi ||sino|/4|\]
  done clear
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• question_answer2) A transmitting antenna of height A and the receiving antenna of height\[\frac{3}{4}h\] are  separated by a distance of d for satisfactory communication in line-of-sight mode. Then, the value of h is [Given, radius of the earth is R]
  A)
  \[\frac{{{d}^{2}}}{2R}{{(2\sqrt{2}-\sqrt{6})}^{2}}\]
  done clear
  B)
   \[\frac{{{d}^{2}}}{4R}{{(2\sqrt{2}-\sqrt{6})}^{2}}\]
  done clear
  C)
   \[\frac{{{d}^{2}}}{R}{{(2\sqrt{2}-\sqrt{6})}^{2}}\]
  done clear
  D)
   \[\frac{{{d}^{2}}}{8R}{{(2\sqrt{2}-\sqrt{6})}^{2}}\]
  done clear
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• question_answer3) The difference of sound levels between two points is 40 dB. What is the ratio of pressure amplitudes between the two points?
  A)
   10    
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  B)
   200   
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  C)
   100   
  done clear
  D)
   400
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• question_answer4) With a standard rectangular bar magnet of length (L), breadth \[(b;b<<I)\] and magnetic moment M, the time period of the magnet in a  vibration magnetometer is 8 s. If the magnet is  cut normal to its length into 8 equal pieces, then the time period (in second) with one of the pieces is
  A)
   8 s
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  B)
   2 s
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  C)
   1 s
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  D)
   4 s
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• question_answer5) A disc of radius a and mass m is pivoted at the rim and is set in small oscillation. If a simple pendulum have the same period as that of the disc, then the length of the simple pendulum should be
  A)
  \[\frac{5}{2}a\]
  done clear
  B)
   \[\frac{3}{2}a\]
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  C)
   \[\frac{7}{2}a\]
  done clear
  D)
   \[\frac{1}{2}a\]
  done clear
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• question_answer6) The effective resistance across the points P and Q is
  A)
  \[\frac{r}{4}\]
  done clear
  B)
   \[\frac{r}{2}\]
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  C)
   \[\frac{r}{8}\]
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  D)
   \[\frac{r}{16}\]
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• question_answer7) A physical quantity X is represented by \[X=[{{M}^{\eta }}{{L}^{-\theta }}{{T}^{-\text{o }\!\!|\!\!\text{ }}}].\]The maximum percentage errors in the measurement of M, L and T, respectively are \[\alpha %,\beta %\]and\[\gamma %.\]The maximum  percentage  error  in  the measurement of X will be
  A)
  \[(\eta \alpha -\theta \beta -\text{o}|\gamma )%\]
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  B)
   \[(\theta \beta +\text{o}|\gamma -\eta \alpha \,\,)%\]
  done clear
  C)
   \[\left( \frac{\alpha }{\eta }-\frac{\beta }{\theta }-\frac{\gamma }{\text{o}|} \right)%\]
  done clear
  D)
   \[(\eta \alpha +\theta \beta +o|\gamma )%\]
  done clear
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• question_answer8) A Galilean telescope has an objective of focal length 200 cm and magnifying power 100. What is the distance between the two lenses in normal?
  A)
   98 cm
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  B)
   198 cm
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  C)
   298 cm
  done clear
  D)
   3 m
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• question_answer9) An elliptically shaped ring of dimensions shown in figure just touches, the horizontal surface of a liquid of surface tension S. The force required to pull the ring away from the liquid surface is
  A)
  \[2\pi (\sqrt{{{a}_{1}}{{b}_{1}}}+\sqrt{{{a}_{2}}{{b}_{2}}})S\]
  done clear
  B)
   \[\pi ({{a}_{1}}+{{b}_{1}}+{{a}_{2}}+{{b}_{2}})S\]
  done clear
  C)
   \[\pi \left( \frac{{{a}_{1}}+{{a}_{2}}}{2}+\frac{{{b}_{1}}+{{b}_{2}}}{2} \right)S\]
  done clear
  D)
   \[\sqrt{2\pi }(\sqrt{{{a}_{1}}{{b}_{1}}}+\sqrt{{{a}_{2}}{{b}_{2}}})S\]
  done clear
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• question_answer10) A \[50\,\Omega \]galvanometer is shunted by a resistance of \[5\,\Omega .\] The percentage of the total current,  which  passes  through  the galvanometer is
  A)
   8.1%  
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  B)
   10.1% 
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  C)
   11.1% 
  done clear
  D)
   9.1%
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• question_answer11) An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy \[\frac{{{E}_{0}}}{4}.\] Its potential energy is
  A)
   \[\frac{{{E}_{0}}}{4}\]
  done clear
  B)
   \[\frac{{{E}_{0}}}{2}\]
  done clear
  C)
   \[\frac{{{E}_{0}}}{8}\]
  done clear
  D)
   \[{{E}_{0}}\]
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• question_answer12)  A plano-convex glass lens \[({{\mu }_{g}}=3/2)\] of radius of curvature \[R=20\text{ }cm\]is placed at a distance a from a concave lens of focal length 40 cm. What should be the distance b of a point object O from plano-convex lens so that the position of final image is independent of a?
  A)
   20 cm         
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  B)
   60 cm
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  C)
   40 cm           
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  D)
   30 cm
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• question_answer13) In the figure, the ball P is released from rest, when the spring is at its natural length. For the  block Q of mass \[2{{m}_{0}}\]to leave contact with ground at some stage, the minimum mass of P must be
  A)
   \[{{m}_{0}}\]
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  B)
  \[2{{m}_{0}}\]
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  C)
   \[{{m}_{0}}/2\]
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  D)
   \[{{m}_{0}}/4\]
  done clear
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• question_answer14) Consider the circuit, the current through the Zener diode is
  A)
   20 mA
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  B)
   10 mA
  done clear
  C)
   15 mA
  done clear
  D)
   40 mA
  done clear
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• question_answer15) The potential energy of a particle varies with height A from a fixed point as \[E=\left( \frac{P\sqrt{h}}{h+Q} \right)\]where, P and Q are constants. The dimensions of PQ are
  A)
  \[[M{{L}^{2}}{{T}^{-2}}]\]
  done clear
  B)
   \[[{{M}^{3/2}}{{L}^{3/2}}{{T}^{-2}}]\]
  done clear
  C)
   \[[{{M}^{7/2}}{{T}^{-2}}]\]
  done clear
  D)
   \[[M{{L}^{3/2}}{{T}^{-2}}]\]
  done clear
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• question_answer16) Figure shows two convex lenses P and Q, each made up of three different transparent materials. The number of images formed of an object kept on the principal axis of lenses P and Q respectively
  A)
   3 and 1
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  B)
   3 and 3
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  C)
   3 and 2
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  D)
   1 and 3
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• question_answer17) What is the minimum acceleration \[({{a}_{o}})\] of the cart in the given figure so that block P will not  fall? (Assume coefficient of friction as\[\mu \]).
  A)
  \[g/\sqrt{\mu }\]
  done clear
  B)
   \[g/\mu \]
  done clear
  C)
   \[2\mu g\]
  done clear
  D)
   \[{{\mu }^{2}}g\]
  done clear
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• question_answer18) The output resistance of a common emitter transistor amplifier, if the input resistance is \[200\,\Omega \] (\[\alpha =0.98\]and power gain is \[5\times {{10}^{6}},\]is)
  A)
  \[516\,k\Omega \]
  done clear
  B)
   \[216\,k\Omega \]
  done clear
  C)
   \[300\,k\Omega \]
  done clear
  D)
   \[416\,k\Omega \]
  done clear
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• question_answer19) In the shown figure, length of the rod is L, area of cross-section A, Youngs modulus of the material of the rod is Y. Then, B and A is subjected to a tensile force \[{{F}_{A}}\]while force  applied at end \[B,{{F}_{B}}\]is lesser than \[{{F}_{A}}.\]Total change in length of the rod will be
  A)
  \[{{F}_{A}}\times \frac{L}{2AY}\]
  done clear
  B)
   \[{{F}_{B}}\times \frac{L}{2AY}\]
  done clear
  C)
   \[\frac{({{F}_{A}}+{{F}_{B}})}{2AY}\]
  done clear
  D)
   \[\frac{({{F}_{A}}-{{F}_{B}})L}{2AY}\]
  done clear
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• question_answer20) A long insulated copper wire is closely wound as a spiral of \[{{N}_{0}}\]turn. The spiral lies in they-z plane and a steady current \[{{I}_{0}}\]flows through the wire. The X-component of the magnetic field at the centre of the spiral is (assume  inner radius as \[{{R}_{1}}\]and outer radius as \[{{R}_{2}}\]).
  A)
  \[\frac{{{\mu }_{0}}{{N}_{0}}{{l}_{0}}}{4({{R}_{2}}-{{R}_{1}})}\,\,\ln \,({{R}_{2}}/{{R}_{1}})\]
  done clear
  B)
   \[\frac{2{{\mu }_{0}}{{N}_{0}}{{l}_{0}}}{{{R}_{2}}-{{R}_{1}}}\,\,\ln \,({{R}_{2}}/{{R}_{1}})\]
  done clear
  C)
   \[\frac{{{\mu }_{0}}{{N}_{0}}{{l}_{0}}}{2({{R}_{2}}-{{R}_{1}})}\,\,\ln \,{{({{R}_{2}}/{{R}_{1}})}^{2}}\]
  done clear
  D)
   \[\frac{{{\mu }_{0}}{{N}_{0}}{{l}_{0}}}{2({{R}_{2}}-{{R}_{1}})}\,\,\ln \,({{R}_{2}}/{{R}_{1}})\]
  done clear
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• question_answer21) A cable in the form of a spiral roll (shown in the figure) has a linear density \[\rho .\]It is uncoiled at a uniform speed v. If the total length of the cable is L. The work done in uncoiling the cable is
  A)
  \[\rho L{{v}^{2}}/4\]
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  B)
   \[\rho L{{v}^{2}}/2\]
  done clear
  C)
   \[\rho L{{v}^{2}}/3\]
  done clear
  D)
   \[\rho L{{v}^{2}}\]
  done clear
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• question_answer22) A person can see objects clearly only upto a maximum distance of 60 cm. His eye defect, nature of the corrective lens and its focal length are respectively
  A)
   myopia, convex, 60 cm
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  B)
   myopia, concave, 60 cm
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  C)
   hypermetropia, concave, 60 cm
  done clear
  D)
   contract, convex, 60 cm
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• question_answer23) Consider two identical iron spheres P and Q, one which lie on a thermally insulating plate, while the other hangs from an insulated thread. Equal amount of heat (AQ) is supplied to the two spheres. Then,
  A)
   the temperature of Q will be greater than P
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  B)
   the temperature of P will be greater than Q
  done clear
  C)
   their temperature will be equal
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  D)
   cant be predicted
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• question_answer24) A plane electromagnetic wave of frequency 50 MHz travels in free space along the X-direction. At a particular point in space \[E=7.2\,\hat{J}\,V/m.\]At this point, B is equal to
  A)
  \[8.4\times {{10}^{-8}}\hat{k}T\]
  done clear
  B)
   \[2.4\times {{10}^{-8}}\hat{k}T\]
  done clear
  C)
   \[7.4\times {{10}^{-6}}\hat{i}T\]
  done clear
  D)
   \[2.4\times {{10}^{-8}}\hat{j}T\]
  done clear
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• question_answer25) Two tuning forks P and Q sounded together and 6 beats per second are heard. P is in unison with a 30 cm air column open at both ends and Q is in resonance when length of air column is increased by 2 cm. The frequencies of forks P and Q are
  A)
   90 Hz and 84 Hz
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  B)
   100 Hz and 106 Hz
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  C)
   96 Hz and 90 Hz
  done clear
  D)
   206 Hz and 200 Hz
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• question_answer26) An electrical cable having a resistance of \[0.4\,\Omega \]delivers 20 kW at 400V DC to a factory. What is the efficiency of transformer?
  A)
   89.5%            
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  B)
   99.5%
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  C)
   79.5%            
  done clear
  D)
   90.5%
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• question_answer27) Consider a track having frictional coefficient \[\mu .\]A block of mass m is released from point P situated at height \[h.\]Which of the following is correct?
  A)
   It can reach at V
  done clear
  B)
   It cannot reach at V
  done clear
  C)
   It can reach at V, if \[\mu \]is reduced to \[\mu /2\]
  done clear
  D)
   It can reach at V, if \[\mu \]is increased to\[2\mu \]
  done clear
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• question_answer28) Suppose, we split a spherical surface into two parts by a circular loop. Now, a bar magnet is placed near the spherical system as shown in the figure. Through which of the two parts is the magnitude of the magnetic flux larger?
  A)
   Part I
  done clear
  B)
   Part II
  done clear
  C)
   The magnitude of the flux is same for both
  done clear
  D)
   Cannot be predicted without more information about magnetic field
  done clear
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• question_answer29) A partition divides a container having insulated walls into two compartments. The same gas fills the two compartments (see figure). The ratio of the number of  molecules is compartments I and II is
  A)
   1:6
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  B)
   1:6
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  C)
   4:1
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  D)
   1:4
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• question_answer30) In the circuit shown in the figure, the AC source gives a voltage \[V=10\sin (1000\,t).\]Neglecting source resistance, the voltmeter and ammeter reading will be
  A)
  \[20\sqrt{\frac{25}{538}}\,V\]and \[\frac{10}{\sqrt{538}}A\]
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  B)
   \[10\sqrt{\frac{250}{528}}\,V\]and \[\frac{10}{\sqrt{538}}A\]
  done clear
  C)
   \[\sqrt{\frac{250}{538}}\,V\]and \[\frac{1}{\sqrt{538}}A\]
  done clear
  D)
   \[\sqrt{\frac{125}{539}}\,V\]and \[\frac{1}{\sqrt{538}}\,A\]
  done clear
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• question_answer31) The amplitude of a wave disturbance propagating in the positive X-direction is given by \[y=\frac{1}{2+{{x}^{2}}}\]at \[t=0\]and \[y=\frac{1}{[2+{{(x-1)}^{2}}]}\]at \[t=3s,\]where\[x\] and y are in metre. If the shape of the wave disturbance does not change during the propagation, the velocity of the wave is
  A)
  \[\frac{1}{2}m{{s}^{-1}}\]
  done clear
  B)
   \[\frac{1}{3}m{{s}^{-1}}\]
  done clear
  C)
   \[\frac{1}{4}m{{s}^{-1}}\]
  done clear
  D)
   \[\frac{1}{5}m{{s}^{-1}}\]
  done clear
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• question_answer32) Assume an YDSE that has different slits width, as a result, amplitude of waves from two slits are 2A and 4A respectively. If \[4{{I}_{0}}\] be the maximum intensity of the interference pattern, then intensity of the pattern of a point, where phase difference between waves is \[2\text{o }\!\!|\!\!\text{ ,}\] is
  A)
  \[4{{l}_{0}}{{\cos }^{2}}\text{o}|/2\]
  done clear
  B)
   \[\frac{4{{l}_{0}}}{3}{{\sin }^{2}}\text{o }\!\!|\!\!\text{ }\]
  done clear
  C)
   \[\frac{4{{l}_{0}}}{9}[5+4cos2o|]\]
  done clear
  D)
   \[\frac{4{{l}_{0}}}{9}[5+8cos2o|]\]
  done clear
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• question_answer33) A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass and of coefficient of restitution [e]. The ratio of velocities of the two spheres, after collision will be
  A)
   \[\frac{1-e}{1+e}\]
  done clear
  B)
   \[\frac{e}{e+1}\]
  done clear
  C)
   2/e
  done clear
  D)
   \[\frac{e+1}{2e}\]
  done clear
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• question_answer34) The circuit is equivalent to
  A)
   NOR gate        
  done clear
  B)
   AND gate
  done clear
  C)
  NAND gate     
  done clear
  D)
   OR gate
  done clear
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• question_answer35) A particle of mass m is located in a unidimensional potential field, where the potential energy of the particle depends on the coordinates as \[U(x)={{U}_{0}}\]\[(1-\sin bx);\] where \[{{U}_{0}}\]and b are constant. Find the period of small oscillations that the particle performs about the equilibrium position.
  A)
  \[\frac{2\pi }{{{b}^{2}}}\sqrt{\frac{m}{{{U}_{0}}}}\]
  done clear
  B)
   \[\frac{\pi }{b}\sqrt{\frac{m}{{{U}_{0}}}}\]
  done clear
  C)
   \[\frac{{{\pi }^{2}}}{2b}\sqrt{\frac{m}{{{U}_{0}}}}\]
  done clear
  D)
   \[\frac{2\pi }{b}\sqrt{\frac{m}{{{U}_{0}}}}\]
  done clear
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• question_answer36) A square loop of side length \[a\] having\[n\] turns  is kept in a horizontal plane. A uniform magnetic field B exists in vertical direction as  shown in figure. Now, the loop is rotated with constant angular speed \[\omega \]as shown below. (i) (ii) Which of the following statement is correct?
  A)
   Same emf is induced in both cases (i) and (ii)
  done clear
  B)
   Maximum emf is induced in case (i)
  done clear
  C)
   Emf induced in case (ii) is more than (i)
  done clear
  D)
   No emf induced in case (ii)
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• question_answer37) Two blocks are resting on ground with masses \[{{m}_{1}}\]and\[{{m}_{2}}.\] A string connects them which goes over a mass less pulley P. There is no friction between pulley and string. A force F is applied on pulley P. The acceleration of centre of mass of blocks is (Given that \[T=2{{m}_{1}}g\]and \[{{m}_{2}}=3{{m}_{1}}\]
  A)
  \[g/8\]
  done clear
  B)
   \[g/4\]
  done clear
  C)
   \[\frac{g}{2}\]
  done clear
  D)
   g
  done clear
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• question_answer38) The binding energy per nucleon of \[{{C}^{12}}\]is\[{{E}_{1}}\] and that of \[{{C}^{13}}\] is \[{{E}_{2}}.\] The energy required to remove one neutron from \[{{C}^{13}}\]is
  A)
   \[12{{E}_{1}}+12{{E}_{2}}\]
  done clear
  B)
   \[13{{E}_{2}}-12{{E}_{1}}\]
  done clear
  C)
   \[12{{E}_{2}}-13{{E}_{1}}\]
  done clear
  D)
   \[13{{E}_{2}}+12{{E}_{1}}\]
  done clear
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• question_answer39) One mole of an ideal gas is taken from state P to state Q by three different processes (i) PRQ, (ii) PSQ and (iii) PTQ as shown in the p - V diagram. The heat absorbed by the gas is
  A)
   the least in process (ii)
  done clear
  B)
   greater in process (ii) than in process (i)
  done clear
  C)
   the same in the processes (i) and (iii)
  done clear
  D)
   less in process (iii) than in process (ii)
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• question_answer40) \[_{87}^{221}\]undergoes radioactive decay with a half-life of 4 days. The probability that a Ra nucleus will disintegrate in 8 days is
  A)
   \[\frac{1}{2}\]
  done clear
  B)
   \[\frac{3}{8}\]
  done clear
  C)
   \[\frac{1}{4}\]
  done clear
  D)
   \[\frac{3}{4}\]
  done clear
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• question_answer41) A uniform rod of mass m and length L is rotated about an axis passing through the point P as shown in figure. The magnitude of angular momentum of the rod about the rotational axis yy passing through the point P is
  A)
   \[\frac{M{{L}^{2}}}{18}\]
  done clear
  B)
   \[\frac{M{{(x+y)}^{2}}}{9}\]
  done clear
  C)
   \[\frac{M({{L}^{2}}+{{x}^{2}})}{9}\]
  done clear
  D)
   \[\frac{M({{L}^{2}}+2{{y}^{2}})}{18}\]
  done clear
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• question_answer42) A stationary hydrogen atom emits photon corresponding to the first line of Lyman series. If R is the Rydbergs constant and \[m\] is the mass of the atom, then the velocity acquired by the atom is (neglect energy absorbed by the photon)
  A)
  \[\frac{4m}{Rh}\]
  done clear
  B)
   \[\frac{Rh}{4m}\]
  done clear
  C)
   \[\frac{3Rh}{4m}\]
  done clear
  D)
   \[\frac{4m}{3Rh}\]
  done clear
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• question_answer43) Three metal rods of same length and area of cross-section are arranged to form an equilateral triangle as shown in figure. S is the middle point of side QR. If PS is independent of temperature, then [\[{{\alpha }_{1}}\] is coefficient of linear expansion for rod QR and \[{{\alpha }_{2}}\]is that for PQ and PR]
  A)
  \[{{\alpha }_{1}}=2{{\alpha }_{2}}\]
  done clear
  B)
   \[{{\alpha }_{1}}={{\alpha }_{2}}/2\]
  done clear
  C)
   \[{{\alpha }_{1}}={{\alpha }_{2}}\]
  done clear
  D)
   \[{{\alpha }_{1}}=4{{\alpha }_{2}}\]
  done clear
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• question_answer44) A graph regarding photoelectric effect is shown between the maximum kinetic energy of electrons and the frequency of the incident light. On the basis of the data as shown in the graph, calculate the work function.
  A)
   4eV           
  done clear
  B)
   2eV
  done clear
  C)
   4.2eV          
  done clear
  D)
   2.5eV
  done clear
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• question_answer45) A tetrahedral is consisting of 6 identical wires as shown in the figure. Each wire is having a resistance of \[4\Omega .\] When an ideal cell of emf \[5\,V\]is connected across AB as shown, then current through OR is
  A)
   4A              
  done clear
  B)
   \[\frac{6}{19}A\]
  done clear
  C)
   zero               
  done clear
  D)
   1 A
  done clear
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• question_answer46) A stone is projected from the point on the ground in such a direction so as to hit a bird on the top of a telegraph post of height and then attain the maximum height \[3h/2\]above the ground. If at the instant of projection, the bird were to fly away horizontally with uniform speed. Find the ratio between horizontal velocities of the bird and stone, if the stone still hits the bird while decreasing.
  A)
  \[\sqrt{3}-1\]
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  B)
   \[1/\sqrt{3}-1\]
  done clear
  C)
   \[\sqrt{3}+1\]
  done clear
  D)
   \[1/\sqrt{3}+1\]
  done clear
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• question_answer47) Four equal capacitors are connected to a battery as shown in the adjoining figure. The potentials of P and Q are
  A)
   5V and 5V      
  done clear
  B)
   10 V and 5V
  done clear
  C)
   10 V and\[-10\text{ }V\]   
  done clear
  D)
   5 V and \[-5V\]
  done clear
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• question_answer48) Three charges \[{{q}_{1}}=2\times {{10}^{-6}}C,\]and \[{{q}_{2}}=3\times {{10}^{-6}}C\]and \[{{q}_{3}}=-6\times {{10}^{-6}}C\]have been placed as shown in figure. Then, the net electric flux will be minimum for the surface
  A)
  \[{{S}_{1}}\]               
  done clear
  B)
  \[{{S}_{2}}\]
  done clear
  C)
  \[{{S}_{3}}\]              
  done clear
  D)
   same for all
  done clear
  View Answer play_arrow

• question_answer49) Find the electric field vector at P(b, b, b) due to three infinitely long lines of charges along \[x,y\]and z-axes, respectively. The charge density, i.e. charge per unit length of each wire is \[\sigma .\]
  A)
  \[\frac{\sigma }{\pi {{\varepsilon }_{0}}b}(\hat{i}+\hat{j}+\hat{k})\]
  done clear
  B)
   \[\frac{\sigma }{2\pi {{\varepsilon }_{0}}b}(\hat{i}+\hat{j}+\hat{k})\]
  done clear
  C)
   \[\frac{\sigma }{\pi {{\varepsilon }_{0}}b}(\hat{i}+\hat{j}-\hat{k})\]
  done clear
  D)
   \[\frac{\sigma }{2\pi {{\varepsilon }_{0}}b}(\hat{i}+\hat{j}-\hat{k})\]
  done clear
  View Answer play_arrow

• question_answer50) A 2 m wide truck is moving with a uniform speed \[{{v}_{0}}=8m{{s}^{-1}}\]along a straight horizontal road. A pedestrain starts to cross the road with a uniform speed v, when the truck is 4 m away from him. The minimum value of v so that he can cross the road safely is
  A)
  \[2.62\,m{{s}^{-1}}\]
  done clear
  B)
   \[4.6\,m{{s}^{-1}}\]
  done clear
  C)
   \[0.89\,m{{s}^{-1}}\]
  done clear
  D)
   \[1.414\,m{{s}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer51) In the following reaction, product formed is
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer52) Which of the following compounds has same oxidation state of the central metal atom in the cationic and anionic part?
  A)
  \[[Pt{{(N{{H}_{3}})}_{4}}][PtC{{l}_{6}}]\]
  done clear
  B)
   \[[Pt(p{{y}_{4}})][PtC{{l}_{4}}]\]
  done clear
  C)
   \[[Pt(N{{H}_{3}})C{{l}_{2}}][PtC{{l}_{4}}]\]
  done clear
  D)
   \[{{K}_{4}}[Ni{{(CN)}_{6}}]\]
  done clear
  View Answer play_arrow

• question_answer53) Which of the following calcium salt will give cyclopentanone on heating?
  A)
   Calcium succinate  
  done clear
  B)
   Calcium adipate
  done clear
  C)
   Calcium glucarate  
  done clear
  D)
   Calcium oxalate
  done clear
  View Answer play_arrow

• question_answer54) In the reaction, \[C{{H}_{3}}COOH\xrightarrow{LiAl{{H}_{4}}}A\xrightarrow{PC{{l}_{5}}}B\xrightarrow{Alc.KOH}C\]the product is
  A)
   acetaldehyde
  done clear
  B)
   acetylene
  done clear
  C)
   ethylene
  done clear
  D)
   acetylchloride
  done clear
  View Answer play_arrow

• question_answer55) Complete hydrolysis of cellulose gives
  A)
   D-fructose         
  done clear
  B)
   D-ribose
  done clear
  C)
   D-glucose         
  done clear
  D)
   L-glucose
  done clear
  View Answer play_arrow

• question_answer56) Bakelite is obtained from phenol by reacting with
  A)
  \[{{(C{{H}_{2}}OH)}_{2}}\]
  done clear
  B)
   \[C{{H}_{3}}CHO\]
  done clear
  C)
   \[C{{H}_{3}}COC{{H}_{3}}\]
  done clear
  D)
   \[HCHO\]
  done clear
  View Answer play_arrow

• question_answer57) Phosgene can be obtained when
  A)
   white phophorus reacts with alkali
  done clear
  B)
   calcium phosphide reacts with water
  done clear
  C)
   chloroform reacts with air
  done clear
  D)
   bone comes in contact with water
  done clear
  View Answer play_arrow

• question_answer58) Select the coloured and paramagnetic ions
  A)
  \[C{{u}^{+}},Z{{n}^{2+}},C{{a}^{2+}}\]
  done clear
  B)
   \[S{{c}^{3+}},T{{i}^{4+}},{{V}^{5+}}\]
  done clear
  C)
   \[C{{u}^{2+}},C{{r}^{+}},M{{n}^{2+}}\]
  done clear
  D)
   \[N{{i}^{2+}},C{{u}^{+}},H{{g}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer59) Which of the following process is used in extractive metallurgy of magnesium?
  A)
   Fused salt electrolysis
  done clear
  B)
   Self reduction
  done clear
  C)
   Aqueous solution electrolysis
  done clear
  D)
   Thermite reduction
  done clear
  View Answer play_arrow

• question_answer60) Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
  A)
  \[SrS{{O}_{4}}\]
  done clear
  B)
  \[CaS{{O}_{4}}\]
  done clear
  C)
  \[~BeS{{O}_{4}}\]
  done clear
  D)
  \[~BaS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer61) Which of the following statements is true?
  A)
   \[{{H}_{3}}P{{O}_{3}}\]is stronger acid than \[{{H}_{2}}S{{O}_{3}}\]
  done clear
  B)
   In aqueous medium, HF is a stronger acid than HCI
  done clear
  C)
   \[HCl{{O}_{4}}\]is a weaker acid than \[HCl{{O}_{3}}\]
  done clear
  D)
  \[HN{{O}_{3}}\] is a stronger acid than \[HN{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer62) The orbital angular momentum of an electron is 2s orbital is
  A)
  \[+\,\,\frac{1}{2}.\frac{h}{2\pi }\]
  done clear
  B)
   Zero
  done clear
  C)
   \[\frac{h}{2\pi }\]
  done clear
  D)
   \[\sqrt{2}.\frac{h}{2\pi }\]
  done clear
  View Answer play_arrow

• question_answer63) The enthalpy change for a reaction does not depend upon the
  A)
   physical state of reactants and products
  done clear
  B)
   use of different reactants for the same product
  done clear
  C)
   nature of intermediate reaction steps
  done clear
  D)
   difference in initial or final temperature of involved substances
  done clear
  View Answer play_arrow

• question_answer64) The role of a catalyst is to change ......
  A)
   Gibbs energy of reaction
  done clear
  B)
   enthalpy of reaction
  done clear
  C)
   activation energy of reaction
  done clear
  D)
   equilibrium constan
  done clear
  View Answer play_arrow

• question_answer65) When ortho boric acid \[({{H}_{3}}B{{O}_{3}})\] is heated, the residue is
  A)
   boron             
  done clear
  B)
   metaboric acid
  done clear
  C)
   boric anhydride    
  done clear
  D)
   borax
  done clear
  View Answer play_arrow

• question_answer66) 12 g of a non-volatile solute dissolved in 108 g of water produces the relative lowering of vapour pressure of 0.1. The molecular mass of the solute is
  A)
   80               
  done clear
  B)
   60        
  done clear
  C)
   20                
  done clear
  D)
   40
  done clear
  View Answer play_arrow

• question_answer67) Electron gain enthalpy with/negative sign of fluorine is less than that of chlorine due to
  A)
   high ionisation enthalpy of fluorine
  done clear
  B)
   smaller size of chlorine atom
  done clear
  C)
   smaller size of fluorine atom
  done clear
  D)
   bigger size of 2p orbital of fluorine
  done clear
  View Answer play_arrow

• question_answer68) Fog is a colloidal solution of
  A)
   liquid particles dispersed in a gas
  done clear
  B)
   gaseous particles dispersed in a liquid
  done clear
  C)
   solid particles dispersed in a liquid
  done clear
  D)
   solid particles dispersed in a gas
  done clear
  View Answer play_arrow

• question_answer69) In the reaction sequence, (X) is
  A)
   Cyclohexanone
  done clear
  B)
   Caprolactum
  done clear
  C)
   \[HO{{(C{{H}_{2}})}_{6}}N{{H}_{2}}\]
  done clear
  D)
   heaxmethylene diisocyanate
  done clear
  View Answer play_arrow

• question_answer70) The highest calorific value is found in
  A)
   proteins            
  done clear
  B)
   fats
  done clear
  C)
   vitamins            
  done clear
  D)
   carbohydrates
  done clear
  View Answer play_arrow

• question_answer71) In an electric field, if an amino acid migrate towards cathode, the pH of solution is said to be
  A)
   less than PI        
  done clear
  B)
   More than PI
  done clear
  C)
   equal to PI         
  done clear
  D)
   7
  done clear
  View Answer play_arrow

• question_answer72) Acid anhydrides on reaction with primary amines gives
  A)
   amide            
  done clear
  B)
   imide.
  done clear
  C)
   secondary amine  
  done clear
  D)
   imine
  done clear
  View Answer play_arrow

• question_answer73) Benzene diazonium chloride on reaction with phenol in weakly basic medium gives
  A)
   diphenyl ether
  done clear
  B)
   p-hydroxyazobenzene
  done clear
  C)
   chlorobenzene
  done clear
  D)
   benzene
  done clear
  View Answer play_arrow

• question_answer74) Reagent used for the oxidation of allyl alcohol to acrolein is
  A)
  \[KMn{{O}_{4}}\]
  done clear
  B)
   \[{{H}_{2}}{{O}_{2}}\]
  done clear
  C)
   active \[Mn{{O}_{2}}\]
  done clear
  D)
   \[Os{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer75) The enol form of acetone, after treatment with \[{{D}_{2}}O\]gives
  A)
  \[C{{H}_{3}}-\underset{OD}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\]
  done clear
  B)
   \[C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{2}}=\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{2}}D\]
  done clear
  D)
   \[C{{D}_{2}}=\underset{OD}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{D}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer76) The compounds \[[Co(S{{O}_{4}}){{(N{{H}_{3}})}_{5}}]Br\]and \[[Co(S{{O}_{4}}){{(N{{H}_{3}})}_{5}}]Cl\]represent
  A)
   linkage isomerism
  done clear
  B)
   ionisation isomerism
  done clear
  C)
   coordination isomerism
  done clear
  D)
   no isomerism   
  done clear
  View Answer play_arrow

• question_answer77) \[\text{Xe}{{\text{F}}_{\text{2}}}\]on hydrolysis gives
  A)
  \[Xe{{O}_{3}}\]            
  done clear
  B)
  \[XeO\]
  done clear
  C)
  \[Xe\]               
  done clear
  D)
  \[~Xe{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer78) Sulphur in +3 oxidation state is present in
  A)
   dithionous acid     
  done clear
  B)
   sulphurous acid
  done clear
  C)
   thionous acid      
  done clear
  D)
   phyrosulphuric acid
  done clear
  View Answer play_arrow

• question_answer79) Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with\[{{t}_{1/2}}=3.00h.\]What fraction of sample of sucrose remains after 8 h?
  A)
   1.023M           
  done clear
  B)
   0.8725 M
  done clear
  C)
   0.023 M          
  done clear
  D)
   0.1576 M
  done clear
  View Answer play_arrow

• question_answer80) The osmotic pressure of a 5% (wt./vol) solution of cane sugar at\[150{{\,}^{o}}C\]is
  A)
  \[\text{ }\!\!~\!\!\text{ 3}\text{.078 atm}\]        
  done clear
  B)
   \[\text{4}\text{.078 atm}\]
  done clear
  C)
   \[5.078\,\text{atm}\]
  done clear
  D)
  \[2.45\,\text{atm}\]
  done clear
  View Answer play_arrow

• question_answer81) An alloy of Cu, Ag, Au is found to have a simple cubic close packed lattice. If the Ag atoms occupy the face centres and Au is present at the body centre, the formula of the alloy will be
  A)
  \[C{{u}_{4}}A{{g}_{4}}Au\]
  done clear
  B)
   \[CuA{{g}_{3}}Au\]
  done clear
  C)
   \[cuAgCu\]
  done clear
  D)
   \[C{{u}_{4}}A{{g}_{2}}Au\]
  done clear
  View Answer play_arrow

• question_answer82) Ozone layer of stratosphere requires protection from indiscriminate use of
  A)
   pesticides
  done clear
  B)
   atomic explosions
  done clear
  C)
   aerosols and high flying jets
  done clear
  D)
   balloons
  done clear
  View Answer play_arrow

• question_answer83) An insaturated hydrocarbon A adds two molecules of \[{{\text{H}}_{\text{2}}}\]and on reductive ozonolysis gives butane-1, 4-dial, ethanol and propanone. Give the IUPAC name of A.
  A)
   3-methyl octa-2, 6-diene
  done clear
  B)
   2-methyl octa-2, 5-diene
  done clear
  C)
   2-methyl octa-2, 6-diene
  done clear
  D)
   2-methyl octa-3, 5-diene
  done clear
  View Answer play_arrow

• question_answer84) Carborundum is obtained when silica is heated at high temperature with
  A)
   carbon
  done clear
  B)
   carbon monoxide
  done clear
  C)
   carbon dioxide
  done clear
  D)
   calcium carbonate
  done clear
  View Answer play_arrow

• question_answer85) The difference of water molecules in gypsum and plaster of Paris is
  A)
  \[\frac{5}{2}\]
  done clear
  B)
   2
  done clear
  C)
   \[\frac{1}{2}\]
  done clear
  D)
   \[1\frac{1}{2}\]
  done clear
  View Answer play_arrow

• question_answer86) Identify disproportionation reaction.
  A)
  \[C{{H}_{3}}+2{{O}_{2}}\xrightarrow{{}}C{{O}_{2}}+2{{H}_{2}}O\]
  done clear
  B)
   \[C{{H}_{4}}+4C{{l}_{2}}\xrightarrow{{}}CC{{l}_{4}}+4HCl\]
  done clear
  C)
   \[2{{F}_{2}}+2O{{H}^{-}}\xrightarrow{{}}2{{F}^{-}}+O{{F}_{2}}+{{H}_{2}}O\]
  done clear
  D)
   \[2N{{O}_{2}}+2O{{H}^{-}}\xrightarrow{{}}NO_{2}^{-}+NO_{3}^{-}+{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer87) The solubility product of \[\text{A}{{\text{g}}_{\text{2}}}\text{Cr}{{\text{O}}_{\text{4}}}\]is \[32\times {{10}^{-12}}.\]What is the concentration of \[CrO_{4}^{-}\]ions in that solution?
  A)
   \[2\times {{10}^{-4}}M\]
  done clear
  B)
   \[16\times {{10}^{-4}}M\]
  done clear
  C)
   \[8\times {{10}^{-4}}M\]
  done clear
  D)
   \[8\times {{10}^{-8}}M\]
  done clear
  View Answer play_arrow

• question_answer88) The structure of \[\text{I}{{\text{F}}_{\text{5}}}\]can be described as
  A)
   
  done clear
  B)
   
  done clear
  C)
  
  done clear
  D)
    None of these
  done clear
  View Answer play_arrow

• question_answer89) \[\text{pH}\]of \[\text{1}{{\text{0}}^{-8}}\text{N}\,\text{NaOH}\]is 
  A)
   8.0     
  done clear
  B)
   6.0     
  done clear
  C)
   6.98    
  done clear
  D)
   7.04
  done clear
  View Answer play_arrow

• question_answer90) The heat of neutralisation of a strong acid and a strong alkali is \[57.0\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}.\] The heat released when 0.5 mole of \[\text{HN}{{\text{O}}_{\text{3}}}\]solution is mixed with 0.2 mole of KOH is
  A)
   57.0 kJ            
  done clear
  B)
   11.4 kJ
  done clear
  C)
   28.5kJ            
  done clear
  D)
   34.9kJ
  done clear
  View Answer play_arrow

• question_answer91) The unit and value of rate constant and that of rate of reaction are same for
  A)
   zero order         
  done clear
  B)
   first order
  done clear
  C)
   second order      
  done clear
  D)
   third order
  done clear
  View Answer play_arrow

• question_answer92) A weak acid HA after treatment with 1.2 mL of 0.1 M strong base has a pH of 5. At the end point, the volume of same base required is 26.6 mL. The value of \[{{\text{K}}_{\text{a}}}\] is
  A)
  \[8.2\times {{10}^{-6}}\]
  done clear
  B)
   \[6.4\times {{10}^{-6}}\]
  done clear
  C)
   \[5.3\,\times {{10}^{-5}}\]
  done clear
  D)
   \[2.4\times {{10}^{-6}}\]
  done clear
  View Answer play_arrow

• question_answer93)   A and B are respectively.
  A)
   \[{{H}_{2}}/Pt;LiAl{{H}_{4}}/{{H}_{2}}O\]
  done clear
  B)
   \[{{H}_{2}}/Pt;{{H}_{2}}/Pt\]
  done clear
  C)
   \[LiAl{{H}_{4}}/{{H}_{2}}O;LiAl{{H}_{4}}/{{H}_{2}}O\]
  done clear
  D)
    \[LiAl{{H}_{4}}/{{H}_{2}}O;{{H}_{2}}/Pt\]
  done clear
  View Answer play_arrow

• question_answer94) The \[\text{IUPAC}\]name of
  A)
   3, 4-dimethylpentanoyl chloride
  done clear
  B)
   1-chloro-1-oxo-2, 3-dimethylpentane
  done clear
  C)
   2-ethyl-3-methylbutanoyl chloride
  done clear
  D)
   2, 3-dimethylpentanoyl chloride
  done clear
  View Answer play_arrow

• question_answer95) \[\text{F}{{\text{e}}^{\text{2+}}}\]reduces \[\text{N}{{\text{H}}_{\text{4}}}\text{OH}\] to
  A)
   \[N{{H}_{3}}\]
  done clear
  B)
   \[{{N}_{3}}H\]
  done clear
  C)
   \[{{N}_{2}}{{H}_{4}}\]
  done clear
  D)
   \[{{N}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer96) Proteins when heated with conc. \[\text{HN}{{\text{O}}_{\text{3}}}\]give yellow colour. This is known as
  A)
   Hoppes test
  done clear
  B)
   acid-base test
  done clear
  C)
   Biurets test
  done clear
  D)
   Xanthoprotic test
  done clear
  View Answer play_arrow

• question_answer97) A person was using water supplied by municipality. Due to shortage of water, he started using underground water. He felt laxative effect. Its cause due to high concentration of
  A)
  \[C{{O}_{2}}\]
  done clear
  B)
   \[SO_{4}^{2-}\]
  done clear
  C)
   \[CO_{3}^{2-}\]
  done clear
  D)
   \[{{S}^{2-}}\]
  done clear
  View Answer play_arrow

• question_answer98) The order of acidic strength of boron dihalides is
  A)
   \[B{{F}_{3}}<BC{{l}_{3}}<BB{{r}_{3}}<B{{l}_{3}}\]
  done clear
  B)
   \[B{{l}_{3}}<BB{{r}_{3}}<BC{{l}_{3}}<B{{F}_{3}}\]
  done clear
  C)
   \[BC{{l}_{3}}<BB{{r}_{3}}<B{{l}_{3}}<B{{F}_{3}}\]
  done clear
  D)
   \[BB{{r}_{3}}<BC{{l}_{3}}<B{{F}_{3}}<B{{l}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer99) The hardest substance amongst the following is
  A)
  \[~B{{e}_{2}}C\]              
  done clear
  B)
   tritonium
  done clear
  C)
  \[{{B}_{4}}C\]               
  done clear
  D)
   graphite
  done clear
  View Answer play_arrow

• question_answer100) The radius of divalent cation \[{{\text{M}}^{\text{2+}}}\] is 94 pm and  that of divalent anion \[{{\text{X}}^{2-}}\]is 146 pm. Thus \[{{M}^{2+}}{{X}^{2-}}\] has
  A)
  \[\text{NaCl}\]structure      
  done clear
  B)
   linear structure
  done clear
  C)
   \[\text{CsCl}\]structure      
  done clear
  D)
   \[\text{ZnS}\]structure
  done clear
  View Answer play_arrow

• question_answer101) Bt cotton has been made resistant from corn borer disease by the introduction of the gene
  A)
   cry \[\text{ }\!\!|\!\!\text{ Ac}\]            
  done clear
  B)
   cry \[\text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ Ab}\]
  done clear
  C)
   cryl\[\text{ }\!\!|\!\!\text{ Ab}\]            
  done clear
  D)
  \[\text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ Ac}\]
  done clear
  View Answer play_arrow

• question_answer102) Which of the following is not the characteristic of a stable community?
  A)
   Productivity should vary too much from year to year
  done clear
  B)
   It should be resistant to occasional natural and man-made disturbances
  done clear
  C)
   It should be resistant to invasions by alien species
  done clear
  D)
   Productivity should not vary too much from  year to year
  done clear
  View Answer play_arrow

• question_answer103) Three mile Island and chemobyl disasters associated  with  accidental  leakage  of radioactive wastes. In India we had Bhopal gas tragedy. It is associated with which of the following?
  A)
  \[\text{C}{{\text{O}}_{2}}\]              
  done clear
  B)
   Methyl isocyanate
  done clear
  C)
  \[\text{ }\!\!~\!\!\text{ CFCs}\]            
  done clear
  D)
   Methyl cyante
  done clear
  View Answer play_arrow

• question_answer104) Mark the pair of substances among the following, which is essential for coagulation of blood?
  A)
   Heparin and calcium ions
  done clear
  B)
   Calcium ions and platelet factors
  done clear
  C)
   Oxilates and citrates
  done clear
  D)
   Platelet factors and heparin
  done clear
  View Answer play_arrow

• question_answer105) Select an incorrect statement regarding capitulum inflorescence of sunflower.
  A)
   Disc florets are actipomorphic.
  done clear
  B)
   Main axis becomes a flat receptacle.
  done clear
  C)
   Receptacle bears many sessile and small florets.
  done clear
  D)
   Ray florets are actinomorphic.
  done clear
  View Answer play_arrow

• question_answer106) The genotype of B-group father of an O-group child would
  A)
   \[{{\text{ }\!\!|\!\!\text{ }}^{\text{A}}}\text{i}\]
  done clear
  B)
  \[{{\text{ }\!\!|\!\!\text{ }}^{\text{B}}}\text{i}\]
  done clear
  C)
  \[{{\text{l}}^{\text{B}}}{{\text{l}}^{\text{B}}}\]
  done clear
  D)
   \[{{O}_{i}}\]
  done clear
  View Answer play_arrow

• question_answer107) Which of the following is a major difference in   replication   in   prokaryotes   and eukaryotes?
  A)
   Replication in prokaryotes is conservative while it is semiconservative in eukaryotes
  done clear
  B)
   Prokaryotes do not require small RNA primer for initiation of replication as in eukaryotes
  done clear
  C)
   Prokaryotes have single origin of replication and eukaryoteshave multiple origin of replication
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer108) The   process   of   mineralisation   by microorganisms helps in the release of
  A)
   inorganic nutrients from humus
  done clear
  B)
  both organic and inorganic nutrients from detritus
  done clear
  C)
   organic nutrients from humus
  done clear
  D)
   inorganic nutrients from detritus and formation of Humus
  done clear
  View Answer play_arrow

• question_answer109) In a population, when the growth rate reaches to its maximum it is called
  A)
   earring capasity    
  done clear
  B)
   biotic potential
  done clear
  C)
   positive interactions
  done clear
  D)
   negative growth
  done clear
  View Answer play_arrow

• question_answer110) Which of the given statement is correct in the context of observing DNA separation by agarose gel electrophoresis?
  A)
   DNA can be seen in visible light.
  done clear
  B)
   DNA can be seen without staining in visible light.
  done clear
  C)
   Ethidium bromide stained DNA can be seen in visible light.
  done clear
  D)
   Ethidium bromide stained DNA can be seen under exposure to UV light.
  done clear
  View Answer play_arrow

• question_answer111) The first acceptor of electrons from an excited    chlorophyll    molecule    of photosystem-II is
  A)
   cytochrome        
  done clear
  B)
   iron-sulphur protein
  done clear
  C)
   ferredoxin          
  done clear
  D)
   plastoquinone
  done clear
  View Answer play_arrow

• question_answer112) Which of the following is inhibitory neurotransmitter?
  A)
   GABA            
  done clear
  B)
   5-hydroxy tryptophan
  done clear
  C)
   Serotonin          
  done clear
  D)
   Glutamine
  done clear
  View Answer play_arrow

• question_answer113) Which of the following hormone is responsible for regulation of calcium levels in our blood?
  A)
   ACTH             
  done clear
  B)
   Oxytocin
  done clear
  C)
   MSH              
  done clear
  D)
   Thyrocalcitonin
  done clear
  View Answer play_arrow

• question_answer114) Law of dominance explained by Mendel has its basis on which type of cross?
  A)
   Monohybrid cross  
  done clear
  B)
   Dihybrid cross
  done clear
  C)
   Reciprocal cross   
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer115) What is antisense technology?
  A)
   A cell displaying a foreign antigen used for synthesis of antigens
  done clear
  B)
   Production of somaclonal variants in tissue culture
  done clear
  C)
   When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
  done clear
  D)
   RNA polymerase producing DNA
  done clear
  View Answer play_arrow

• question_answer116) Which of the following is not a rhizome?
  A)
   Nelumbium (lotus)
  done clear
  B)
   Curcuma (turmeric)
  done clear
  C)
   Crocus (kesar)
  done clear
  D)
   Zingiber (ginger)
  done clear
  View Answer play_arrow

• question_answer117) The modified equation for water potential is
  A)
  \[{{\psi }_{w}}={{\psi }_{s}}+{{\psi }_{\rho }}\]
  done clear
  B)
   \[{{\psi }_{w}}={{\psi }_{s}}-{{\psi }_{\rho }}\]
  done clear
  C)
   \[{{\psi }_{w}}={{\psi }_{s}}\]
  done clear
  D)
   \[{{\psi }_{w}}={{\psi }_{\rho }}-{{\psi }_{s}}\]
  done clear
  View Answer play_arrow

• question_answer118) The synthetic hormone used as a weedicide is
  A)
   indole 3-acetic acid
  done clear
  B)
   gibberellic acid
  done clear
  C)
   2, 4-dichlorophenoxyacetic acid
  done clear
  D)
   malic hydrazide
  done clear
  View Answer play_arrow

• question_answer119) Seedless fruits can be made by treating the unpollinated ovaries with
  A)
   auxines            
  done clear
  B)
   colchicine
  done clear
  C)
   sucrose solution    
  done clear
  D)
   pure lanolin
  done clear
  View Answer play_arrow

• question_answer120) In yeast, the sexual reproduction is by conjugation. After fusion, the zygotic nucleous divides meiotically and forms haploid spores. The unicellular structure with haploid spores is
  A)
   sporangium      
  done clear
  B)
   gametangium
  done clear
  C)
   ascus             
  done clear
  D)
   zoosporangium
  done clear
  View Answer play_arrow

• question_answer121) Which of the following is not true for hormones?
  A)
   They are not available again after the process is over
  done clear
  B)
   Hormones are directly poured into blood
  done clear
  C)
   They induce or inhibit bio-chemical processes
  done clear
  D)
   Each and every hormone of human is always chemically protein
  done clear
  View Answer play_arrow

• question_answer122) What is true about neurohypophysis?
  A)
   Stores hormones produced byadenohypophysis
  done clear
  B)
   Functionless in humans
  done clear
  C)
   Stores and releases neurohormones secreted by hypothalamus
  done clear
  D)
   Secretes its own hormone
  done clear
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• question_answer123) Which of the following is an exclusive character in mammals?

  (i) Muscular diaphragm is present in mammals.

  (ii) Homeothermy is exclusively present in mammals.

  (iii) Heart is four-chambered with two auricles and two ventricles.

  (iv) Mammals can be both oviparous and viviparous

  A)
   Only I               
  done clear
  B)
   Only IV
  done clear
  C)
   II and III            
  done clear
  D)
   Only III
  done clear
  View Answer play_arrow

• question_answer124) Which one of the following is a matching set of phylum and its three examples?
  A)
  Cnidari-Bonellia, Physalia and Aurelia
  done clear
  B)
   Platyhelminthes-Planaira, Enterobius and Schistosoma
  done clear
  C)
   Mollusca-Loligo, Teredo and Octopus
  done clear
  D)
   Porifera-Spongilla, Euplectella and Pennatula
  done clear
  View Answer play_arrow

• question_answer125) Arrange the following events of the replication of DNA.

  (i) Bonds between complementary bases breaks.

  (ii) Bonds between complementary bases forms.

  (iii) DNA molecules uncoils.

  (iv) Opposite strands separates.

  (v) Sugar phosphate bonds forms.

  (VI) Free nucleotides align with the complementary nucleotides on each strand.

  Choose the correct alternative
  A)
   \[VI\to I\to III\to IV\to V\to II\]
  done clear
  B)
   \[III\to VI\to IV\to V\to II\]
  done clear
  C)
   \[I\to III\to VI\to IV\to II\to V\]
  done clear
  D)
   \[III\to I\to IV\to VI\to II\to V\]
  done clear
  View Answer play_arrow

• question_answer126) A haemophilic woman marries a normal man, then
  A)
   all the children will be normal
  done clear
  B)
   all the sons will be haemophilic
  done clear
  C)
   all the girls will be haemophilic
  done clear
  D)
   half girls will be haemophilic
  done clear
  View Answer play_arrow

• question_answer127) Vascular bundles in monocotyledons are considerd closed because
  A)
   xylem is surrounded all around by phloem
  done clear
  B)
   there are no vessels with perforations
  done clear
  C)
   a bundle sheath surrounds each bundle
  done clear
  D)
   there is no secondary growth
  done clear
  View Answer play_arrow

• question_answer128) In Mirabilis, a hybrid for red (RR) and white (rr) flower produces pink (Rr) flower. A  plant with pink flower is crossed with white flower, the expected phenotypic ratio is
  A)
   red: pink; white (1 : 2 :1)
  done clear
  B)
   pink: white (1 :1)
  done clear
  C)
   red: pink (1 : 1)
  done clear
  D)
   red: white (3:1)
  done clear
  View Answer play_arrow

• question_answer129) Variable Number of Tandem Repeats (VNTRs) in the DNA molecule are highly useful in                        
  A)
   recombinant DNA technology
  done clear
  B)
   DNA fingerprinting
  done clear
  C)
   monoclonal antibody production
  done clear
  D)
   stem cell culture
  done clear
  View Answer play_arrow

• question_answer130) Male gametes of Cycas are
  A)
   small, biciliate and circular
  done clear
  B)
   small, uniciliate and circular
  done clear
  C)
   large, biciliate and reniform
  done clear
  D)
   large, multiciliated and top-shaped
  done clear
  View Answer play_arrow

• question_answer131) Sexual reproduction in Spirogyra is on advanced feature because it shows
  A)
   morphologically differentiated sex organs
  done clear
  B)
   physiologically differentiated sex organs
  done clear
  C)
   different sizes of motile sex organs
  done clear
  D)
   same size of motile sex organs
  done clear
  View Answer play_arrow

• question_answer132) Which of the following statements is correct?
  A)
   Glucose acts as inducer for/ac operon.
  done clear
  B)
   Galactose acts as inducer for lac operon.
  done clear
  C)
   Glucose or galactose act as inducers for lac operon.
  done clear
  D)
   Glucose or galactose cannot act as inducer for lac operon.
  done clear
  View Answer play_arrow

• question_answer133) The segment of DNA that codes for a polypeptide is called
  A)
   recon             
  done clear
  B)
   cistron
  done clear
  C)
   intron             
  done clear
  D)
   muton
  done clear
  View Answer play_arrow

• question_answer134) Which of the following is formed from phosphorylation?
  A)
   Fructose 1, 6-biphosphate
  done clear
  B)
   Phosphdglyceric acid
  done clear
  C)
   PEP
  done clear
  D)
   Pyruvic acid
  done clear
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• question_answer135) Which one of the following pairs of geographical areas shows maximum biodiversity in our country?
  A)
   Western Ghats and North-East region
  done clear
  B)
   Deccan peninsula and Sundarbans
  done clear
  C)
   Semi-arid zone and North-East region
  done clear
  D)
   Andman and Nicobar islands
  done clear
  View Answer play_arrow

• question_answer136) Heroin is
  A)
   sedative and euphoriant
  done clear
  B)
   white and analgesic (pain killers)
  done clear
  C)
   a bitteralkaloid
  done clear
  D)
   white, odourless, bitter crystalline compound
  done clear
  View Answer play_arrow

• question_answer137) Which one of the following is being tried in India as a bio fuel substitute for fossil fuels?
  A)
   Jatropha
  done clear
  B)
   Azadirachta
  done clear
  C)
   Musa                          
  done clear
  D)
   Aegilops
  done clear
  View Answer play_arrow

• question_answer138) Which one of the following option is right?
  A)
   Left auricle, oxygenated blood, high pH
  done clear
  B)
   Lett auricle, deoxygenated blood, low pH
  done clear
  C)
   Right auricle, deoxygenated blood, low pH
  done clear
  D)
   Right auricle, oxygenated blood, high pH
  done clear
  View Answer play_arrow

• question_answer139) Match the following columns.

  Column I	Column II
  A. Darwin B. Alfred Wallace C. HugodeVries D. Lamarck	1. Evening primrose 2. MMS Beagle 3. Long necked giraffe 4. Archepelago

  A)
   A-2         B-4         C-1         D-3
  done clear
  B)
   A-2         B-1         C-4         D-3
  done clear
  C)
   A-4          B-1         C-2         D-3
  done clear
  D)
   A-3         B-2          C-1         D-4
  done clear
  View Answer play_arrow

• question_answer140) Modern representative of an ancient link between the echinoderms and the chordates is represented by
  A)
   Hemichordata
  done clear
  B)
   Urochordata
  done clear
  C)
   Cephalochordata
  done clear
  D)
   Vertebrates
  done clear
  View Answer play_arrow

• question_answer141) Assertion [A] Power of locomotion is poor in Ascans. Reason [R] The body wall of Ascaris has cuticle, but lacks circular muscles.
  A)
   Both A and R true and R is the correct explanation of A.
  done clear
  B)
   Both A and R true, but R is not the correct explanation of A.
  done clear
  C)
   A is true, R is false.
  done clear
  D)
   Both A and R are false.
  done clear
  View Answer play_arrow

• question_answer142) Identify the correctly matched pair.
  A)
   Gir forest      -   Rhino                          
  done clear
  B)
   Kaziranga     -  Elephant                     
  done clear
  C)
   Corbettpark  - Aves
  done clear
  D)
   RannofKutch - Wild ass
  done clear
  View Answer play_arrow

• question_answer143) Random genetic drift in a population leads to
  A)
   highly genetically variable individuals
  done clear
  B)
   increased inbreeding within a population
  done clear
  C)
   constant low mutation rate
  done clear
  D)
   large population size
  done clear
  View Answer play_arrow

• question_answer144) Select the false statement.
  A)
   Ribosomes and centriole are non-membrane bound organalles of a cell.
  done clear
  B)
   Ribosomes are enveloped by a double membrane.
  done clear
  C)
   Plasmadesmeta are the cytoplasmic connections between cells.
  done clear
  D)
   Cell membrane is semi-permeable or selectively permeable.
  done clear
  View Answer play_arrow

• question_answer145) Single Cell Protein (SCP) is
  A)
   protein obtained from a clone of cells
  done clear
  B)
   protein obtained from unicellular organisms
  done clear
  C)
   biomass obtained from microorganisms
  done clear
  D)
   proteins obtained from biomass of microorganisms
  done clear
  View Answer play_arrow

• question_answer146) Identify the wrongly matched pair.
  A)
   Typhoid         -   Widal test
  done clear
  B)
   Plague            -   Viral disease
  done clear
  C)
   Malignant  - Plasmodium malaria falciparum
  done clear
  D)
   Common   - Rhinovirus cold      
  done clear
  View Answer play_arrow

• question_answer147) The system of classification proposed by Linnaeus are artificial because
  A)
   It considered physiological characters along with morphology
  done clear
  B)
   It considered evolutionary relationships of plants
  done clear
  C)
   It takes into account similarities and differences in few uniflying characters
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer148) Haemolymph of cockroach contains
  A)
   erythrocytes and plasma
  done clear
  B)
   respiratory pigments only
  done clear
  C)
   haemocytes, leucocytes and plasma
  done clear
  D)
   haemocytes and plasma
  done clear
  View Answer play_arrow

• question_answer149) Hyperosmotic urine secretion depends upon the
  A)
   width of Bowmans capsule
  done clear
  B)
   length of loop of Henie
  done clear
  C)
   length of proscimal convoluted tubules
  done clear
  D)
   length of distle convoluted tubule
  done clear
  View Answer play_arrow

• question_answer150) TMV and majority of plant viruses possess
  A)
   Only ssRNA
  done clear
  B)
   Only dsRNA
  done clear
  C)
   Both RNA and DNA
  done clear
  D)
   Only DNA
  done clear
  View Answer play_arrow