Solved papers for JCECE Medical JCECE Medical Solved Paper-2008

done JCECE Medical Solved Paper-2008 Total Questions - 150

• question_answer1) A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement  \[x\] is proportional to
  A)
  \[{{x}^{2}}\]
  done clear
  B)
   \[{{e}^{x}}\]
  done clear
  C)
   \[x\]
  done clear
  D)
   \[{{\log }_{e}}x\]
  done clear
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• question_answer2) A ball is thrown from a point with a speed \[{{\text{v}}_{\text{0}}}\]at an angle of projection \[\theta .\]From the same point and at the same instant, a person starts running with a constant speed \[\frac{{{v}_{0}}}{2}\]to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection?
  A)
   Yes,\[{{60}^{o}}\]         
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  B)
   Yes, \[{{30}^{o}}\]
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  C)
   No              
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  D)
   Yes, \[{{45}^{o}}\]
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• question_answer3) Spherical balls of radius R are falling in a viscous fluid of viscosity \[\eta \]with a velocity v. The retarding viscous force acting on the spherical ball is
  A)
   directly proportional to R but inversely proportional to v
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  B)
   directly proportional to both radius R and velocity v
  done clear
  C)
   inversely proportional to both radius R and velocity v
  done clear
  D)
   inversely proportional to R but directly proportional to velocity \[v\]
  done clear
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• question_answer4) Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
  A)
   paramagnetism
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  B)
   anti-ferromagnetism
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  C)
   no magnetic property,
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  D)
   diamagnetism
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• question_answer5) In radioactive decay process, the negatively charged emitted (3-particles are
  A)
   the electrons present inside the nucleus
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  B)
   the electrons produced as a result of the decay of neutrons inside the nucleus
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  C)
   the electrons produced as a result of collisions between atoms
  done clear
  D)
   the electrons orbiting around the nucleus
  done clear
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• question_answer6) What is the value of inductance L for which the current is a maximum in a series LCR circuit with \[C=10\mu F\]and\[\omega =1000\,{{s}^{-1}}\]?
  A)
  \[100\,mH\]
  done clear
  B)
   \[1\,mH\]
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  C)
   Cannot be calculated unless R is known
  done clear
  D)
   \[10\text{ }mH\]
  done clear
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• question_answer7) Three point charges \[+\,q,-2q\]and \[+q\]are placed at points \[(x=0,y=a,z=0),\]\[(x=0,y=0,z=0)\]and\[(x=a,y=0,z=0),\] respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
  A)
   \[\sqrt{2}\,qa\]along \[+y\]direction
  done clear
  B)
  \[\sqrt{2}qa\] along the line joining points \[(x=0,y=0,z=0)\]and \[(x=a,y=a,z=0)\]
  done clear
  C)
   \[qa\]along the line joining points \[(x=0,y=0,z=0)\] and \[(x=a,y=a,z=0)\]
  done clear
  D)
   \[\sqrt{2}qa\]along \[+x\]direction   
  done clear
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• question_answer8) The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below The logic circuit gate is
  A)
   AND gate       
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  B)
   NAND gate
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  C)
   NOR gate       
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  D)
   OR gate
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• question_answer9) Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature \[t{{\,}^{o}}C,\]the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is
  A)
  \[\frac{4\pi {{r}^{2}}\sigma {{t}^{4}}}{{{R}^{2}}}\]
  done clear
  B)
   \[\frac{{{r}^{2}}\sigma {{(t+273)}^{4}}}{4\pi {{R}^{2}}}\]
  done clear
  C)
   \[\frac{16{{\pi }^{2}}{{r}^{2}}\sigma {{t}^{4}}}{{{R}^{2}}}\]
  done clear
  D)
   \[\frac{{{r}^{2}}\sigma {{(t\,+273)}^{4}}}{{{R}^{2}}}\]
  done clear
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• question_answer10) The temperature of the two outer surfaces of  a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness \[x\]and \[4x,\] respectively are \[{{T}_{2}}\]and \[{{T}_{1}}({{T}_{2}}>{{T}_{1}}).\] The rate of heat transfer through the slab, in a steady state is\[\left( \frac{A({{T}_{2-}}{{T}_{1}})K}{x} \right)f,\] with \[f\] equals to
  A)
   1               
  done clear
  B)
   1/2
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  C)
   2/3             
  done clear
  D)
   1/3
  done clear
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• question_answer11) The maximum number of possible interference maxima for slit-separation equal 'to twice the wavelength in Young?s double-slit experiment, is
  A)
   infinite         
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  B)
   five
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  C)
   three           
  done clear
  D)
   zero
  done clear
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• question_answer12) Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a 'force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged, is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B» and C is
  A)
   \[\frac{F}{4}\]
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  B)
   \[\frac{3F}{4}\]
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  C)
   \[\frac{F}{8}\]
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  D)
   \[\frac{3F}{8}\]
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• question_answer13) In gamma ray emission from a nucleus
  A)
   both the neutron number and the proton number change
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  B)
   there is no change in the proton number and the neutron number
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  C)
   only the neutron number changes
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  D)
   only the proton number changes
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• question_answer14) A particle starting from the origin (0, 0) moves in a straight line in the \[(x,y)\] plane. Its coordinates at a later time are \[(\sqrt{3},3).\] The path of the particle makes with the \[x-\]axis an angle of
  A)
  \[{{30}^{0}}\]             
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  B)
  \[{{45}^{o}}\]
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  C)
  \[{{60}^{o}}\]              
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  D)
  \[{{0}^{o}}\]
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• question_answer15) The resistance of an ammeter is \[13\,\Omega \] and its scale is graduated for a current upto 100 A. After an .additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 A by this meter. The value of shunt resistance is
  A)
  \[20\,\Omega \]          
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  B)
  \[2\,\Omega \]
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  C)
  \[0.2\,\,\Omega \]           
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  D)
  \[2\,k\Omega \]
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• question_answer16) The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux \[\text{o }\!\!|\!\!\text{ }\] linked with the primary coil is given by\[\text{o }\!\!|\!\!\text{ =}\,\text{o}{{\text{ }\!\!|\!\!\text{ }}_{0}}+4t,\] where \[\text{o }\!\!|\!\!\text{ }\]is in weber, t is time in second and \[\,\text{o}{{\text{ }\!\!|\!\!\text{ }}_{0}}\] is a constant, the output voltage across the secondary coil is
  A)
   90 V            
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  B)
   120 V
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  C)
   220 V           
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  D)
   30 V
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• question_answer17) A uniform rod AB of length I and mass m is free to rotate about point A. The rod is released from rest in the horizontal position. Given that the  moment of inertia of the rod about A is \[\frac{m{{l}^{2}}}{3},\]  the initial angular acceleration of the rod will be
  A)
  \[\frac{2g}{3l}\]
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  B)
   \[mg\frac{l}{2}\]
  done clear
  C)
   \[\frac{3}{2}gl\]
  done clear
  D)
   \[\frac{3g}{2l}\]
  done clear
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• question_answer18) In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an
  A)
   p-type semiconductor
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  B)
   insulator
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  C)
   metal
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  D)
   \[n-\]type semiconductor
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• question_answer19) A particle executes simple harmonic oscillation with an amplitude a. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the  equilibrium position is
  A)
  \[\frac{T}{4}\]
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  B)
   \[\frac{T}{8}\]
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  C)
   \[\frac{T}{12}\]
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  D)
   \[\frac{T}{2}\]
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• question_answer20) A block B is pushed momentarily along a horizontal surface with an initial velocity \[v.\]If \[\mu \]is the coefficient of sliding friction between B and the surface, block B will come to rest after a time
  A)
  \[\frac{v}{g\mu }\]
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  B)
   \[\frac{g\mu }{v}\]
  done clear
  C)
   \[\frac{g}{v}\]
  done clear
  D)
  \[\frac{v}{g}\]
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• question_answer21) A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately
  A)
   30%           
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  B)
   50%
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  C)
   90%           
  done clear
  D)
   10%
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• question_answer22) A Steady current of 1.5 A flows through a copper voltameter for 10 min. If the electrochemical equivalent of copper is \[30\times {{10}^{-5}}g\,{{C}^{-1}},\] the mass of copper deposited on the electrode will be
  A)
   0.40 g          
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  B)
   0.50 g
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  C)
   0.67 g          
  done clear
  D)
   0.27 g
  done clear
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• question_answer23) Three resistances P, Q, R each of \[2\Omega \]and an unknown resistance S form the four arms of a Wheatstone's bridge circuit. When a resistance of \[6\,\Omega \] is connected in parallel to S the bridge gets balanced. What is the value of S?
  A)
  \[2\,\Omega \]            
  done clear
  B)
  \[3\,\Omega \]
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  C)
  \[6\,\Omega \]            
  done clear
  D)
  \[1\,\Omega \]
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• question_answer24)  A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion. The spring constant is 200 N/m. What should be the minimum amplitude of the motion, so that the mass gets detached from the pan? (Take\[g=10\,m/{{s}^{2}}\])
  A)
   8.0 cm
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  B)
   10.0cm
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  C)
   Any value less than 12.0 cm
  done clear
  D)
   4.0 cm
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• question_answer25) Two satellites of earth, \[{{\text{S}}_{\text{1}}}\]and \[{{\text{S}}_{2}}\]are moving in the same orbit. The mass of \[{{\text{S}}_{1}}\]is four times the mass of \[{{\text{S}}_{2}}.\]Which one of the following statements is true?
  A)
   The time period of \[{{\text{S}}_{1}}\]is four times that of \[{{\text{S}}_{2}}.\]
  done clear
  B)
   The potential energies of earth and satellite in the two cases are equal
  done clear
  C)
   \[{{\text{S}}_{1}}\]and \[{{\text{S}}_{2}}\]are moving with the same speed.
  done clear
  D)
   The kinetic energies of the two satellites are equal.
  done clear
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• question_answer26) Charges \[+q\]and\[~-q\] are placed at points A and B respectively which are a distance 2 L apart, C is the midpoint between A and B. The work done in moving a charge \[+Q\]along the semicircle CRD is
  A)
  \[\frac{qQ}{4\pi {{\varepsilon }_{0}}L}\]
  done clear
  B)
   \[\frac{qQ}{2\pi {{\varepsilon }_{0}}L}\]
  done clear
  C)
   \[\frac{qQ}{6\pi {{\varepsilon }_{0}}L}\]
  done clear
  D)
   \[-\frac{qQ}{6\pi {{\varepsilon }_{0}}L}\]
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• question_answer27) A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move
  A)
   in an elliptical orbit
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  B)
   in a circular orbit
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  C)
   along a parabolic path
  done clear
  D)
   along a straight line
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• question_answer28) Monochromatic    light    of   frequency \[\text{6}\text{.0}\,\text{ }\!\!\times\!\!\text{ }\,\,\text{1}{{\text{0}}^{\text{14}}}\text{ Hz}\]is produced by a laser. The power emitted is \[2\times {{10}^{-3}}W.\]The number of photons emitted, on the average, by the source per second is
  A)
  \[5\times {{10}^{15}}\]
  done clear
  B)
   \[5\times {{10}^{16}}\]
  done clear
  C)
   \[5\times {{10}^{17}}\]
  done clear
  D)
   \[5\times {{10}^{14}}\]
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• question_answer29) The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy?
  A)
   III                
  done clear
  B)
   IV
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  C)
   I                  
  done clear
  D)
   II
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• question_answer30) In the circuit, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of the resistor R will be
  A)
  \[200\,\Omega \]          
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  B)
  \[100\,\Omega \]
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  C)
   \[500\,\Omega \]          
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  D)
  \[1000\,\Omega \]
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• question_answer31) When an unpolarized light of intensity \[{{\text{I}}_{\text{0}}}\]is incident on a polarizing sheet, the intensity of the light which does not get transmitted is
  A)
  \[\frac{1}{2}{{I}_{0}}\]
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  B)
   \[\frac{1}{4}{{I}_{0}}\]
  done clear
  C)
    zero
  done clear
  D)
   \[{{I}_{0}}\]
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• question_answer32) An observer moves towards a stationary source of sound, with a velocity one-fifth of the  velocity of sound. What is the percentage increase in the apparent frequency?
  A)
   Zero            
  done clear
  B)
   0.5%
  done clear
  C)
   5%             
  done clear
  D)
   20%
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• question_answer33) A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is
  A)
  \[-0.5\,J\]
  done clear
  B)
   \[-1.25\,J\]
  done clear
  C)
   \[1.25\,J\]
  done clear
  D)
  \[0.5\,J\]
  done clear
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• question_answer34) A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of \[{{45}^{o}}\] with the initial vertical direction is
  A)
  \[Mg(\sqrt{2}+1)\]
  done clear
  B)
   \[Mg\sqrt{2}\]
  done clear
  C)
   \[\frac{Mg}{\sqrt{2}}\]
  done clear
  D)
   \[Mg(\sqrt{2}-1)\]
  done clear
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• question_answer35) An electric charge \[{{10}^{-3}}\,\mu C\]is placed at the origin (0, 0) of X-Y coordinate system. Two points A and B are situated at \[(\sqrt{2},\sqrt{2})\] and (2, 0) respectively. The potential difference between the points A and B will be
  A)
   9 V             
  done clear
  B)
   zero
  done clear
  C)
   2 V             
  done clear
  D)
   4.5 V
  done clear
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• question_answer36) A circular disc of radius R is removed from a bigger circular disc of radius 2R, such that the circumference of the discs coincide. The centre of mass of the new disc is \[\alpha R\]from the centre  of the bigger disc. The value of \[\alpha \]is
  A)
   1/3             
  done clear
  B)
   1/2
  done clear
  C)
   1/6             
  done clear
  D)
   1/4
  done clear
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• question_answer37) A common-emitter amplifier has a voltage gain of 50, an input impedance of \[100\,\Omega \] and an output impedance of \[200\,\Omega .\] The power gain of the amplifier is
  A)
   500            
  done clear
  B)
   1000
  done clear
  C)
   1250           
  done clear
  D)
   100
  done clear
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• question_answer38) A vertical spring with force constant k is fixed on a table. A ball of mass \[m\]at a height h above the free upper end of the spring falls vertically on the spring, so that the spring is compressed by a distance d. The net work done in the process is
  A)
   \[mg(h+d)+\frac{1}{2}k{{d}^{2}}\]
  done clear
  B)
   \[mg(h+d)-\frac{1}{2}k{{d}^{2}}\]
  done clear
  C)
   \[mg(h-d)-\frac{1}{2}k{{d}^{2}}\]
  done clear
  D)
   \[mg(h-d)+\frac{1}{2}k{{d}^{2}}\]
  done clear
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• question_answer39) Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be
  A)
  \[[M{{L}^{2}}{{T}^{-3}}{{I}^{-1}}]\]
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  B)
   \[[M{{L}^{2}}{{T}^{-2}}]\]
  done clear
  C)
   \[[M{{L}^{2}}{{T}^{-1}}{{I}^{-1}}]\]
  done clear
  D)
   \[[M{{L}^{2}}{{T}^{-3}}{{I}^{-2}}]\]
  done clear
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• question_answer40) The work of 146 kJ is performed in order to compress one kilo mole of a gas adiabatically and in this process the temperature of the gas increases by \[{{\text{7}}^{\text{o}}}\text{C}\text{.}\] The gas is\[(R=8.3\,\text{J}\,\text{mo}{{\text{l}}^{-1}}{{K}^{-1}})\]
  A)
   diatomic
  done clear
  B)
   triatomic
  done clear
  C)
   a mixture of monoatomic and diatomic
  done clear
  D)
   monoatomic
  done clear
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• question_answer41) Diwali rocket is ejecting 50 g of gases/sec at a velocity of 400 m/s. The accelerating force on the rocket will be
  A)
   22 dyne        
  done clear
  B)
   20 N
  done clear
  C)
   20 dyne        
  done clear
  D)
   100 N
  done clear
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• question_answer42) A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%, the energy of the soap film will be changed by
  A)
   100%
  done clear
  B)
   75%
  done clear
  C)
   50%          
  done clear
  D)
   25%
  done clear
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• question_answer43) A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the power of a cut lens will be
  A)
   2D             
  done clear
  B)
   3D
  done clear
  C)
   4D             
  done clear
  D)
   5D
  done clear
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• question_answer44) Two non-ideal batteries are connected in parallel. Consider the following statements. (i) The equivalent emf is smaller than either of the two emfs. (ii) The equivalent internal resistance is smaller  than either of the two internal resistances.
  A)
   Both (i) and (ii) are correct
  done clear
  B)
   (i) is correct but (ii) is wrong
  done clear
  C)
   (ii) is correct but (i) is wrong
  done clear
  D)
   Both (i) and (ii) are wrong
  done clear
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• question_answer45) The period of oscillation of a simple pendulum is given by \[T=2\pi \sqrt{\frac{l}{g}},\]where \[l\]is about 100 cm V  and is known to have 1 mm accuracy. The period is about 2s. The time of 100 oscillations is measured by a stop watch of least count s. The percentage error in g is
  A)
   0.1%           
  done clear
  B)
   1%
  done clear
  C)
   0.2%           
  done clear
  D)
   0.8%
  done clear
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• question_answer46) The mass of the earth is 6.00 x 1024 kg and that of the moon is \[7.40\times {{10}^{22}}kg.\] The constant of gravitation \[G=6.67\times {{10}^{-11}}\,N-{{m}^{2}}/k{{g}^{2}}.\]The potential   energy  of  the   system  is \[-7.79\times {{10}^{23}}\,J.\] The mean distance between the earth and moon is
  A)
  \[~3.80\times {{10}^{8}}m\]    
  done clear
  B)
  \[~3.37\times {{10}^{6}}m\]
  done clear
  C)
  \[~7.60\times {{10}^{4}}\text{ }m\]     
  done clear
  D)
  \[~1.90\times {{10}^{2}}\text{ }m\]
  done clear
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• question_answer47) If a rubber ball is taken at the depth of 200m in a pool, its volume decreases by 0.1%. If the density of water is \[\text{1 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{3}}}\,\text{kg/}{{\text{m}}^{\text{3}}}\]and \[g=10\,m/{{s}^{2}},\]then the volume of elasticity in \[\text{N/}{{\text{m}}^{\text{2}}}\]will be
  A)
  \[\text{1}{{\text{0}}^{8}}\]           
  done clear
  B)
  \[\text{2}\times \text{1}{{\text{0}}^{8}}\]
  done clear
  C)
  \[\text{1}{{\text{0}}^{9}}\]           
  done clear
  D)
  \[\text{2}\times \text{1}{{\text{0}}^{9}}\]
  done clear
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• question_answer48) At 100K and 0.1 atmospheric pressure, the volume of helium gas is 10 L. If volume and pressure are doubled its temperature will change to
  A)
   400 K          
  done clear
  B)
   127 K
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  C)
   200 K          
  done clear
  D)
   25 K
  done clear
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• question_answer49) An organ pipe \[{{\text{P}}_{\text{1}}}\]closed at one end vibrating in its first overtone and another pipe \[{{\text{P}}_{2}}\]open at both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of lengths of \[{{\text{P}}_{\text{1}}}\]and\[{{\text{P}}_{2}}\] is
  A)
   1:2            
  done clear
  B)
   1 : 3
  done clear
  C)
   3 : 8            
  done clear
  D)
   3 : 4
  done clear
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• question_answer50) Fraunhofer spectrum is a
  A)
   line absorption spectrum
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  B)
   band absorption spectrum
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  C)
   line emission spectrum
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  D)
   band emission spectrum
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• question_answer51) How many unit cells are present in a cube shaped ideal crystal of \[\text{NaCl}\]of mass 1.00 g? [Atomic masses :\[\text{Na}\,\text{=}\,\text{23,}\,\text{Cl}\,\text{=}\,\text{35}\text{.5}\]
  A)
  \[2.57\times {{10}^{21}}\]     
  done clear
  B)
  \[5.14\times {{10}^{21}}\]
  done clear
  C)
   \[1.28\times {{10}^{21}}\]
  done clear
  D)
   \[1.71\times {{10}^{21}}\]
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• question_answer52) In acidic medium dichromate ion oxidises ferrous ion to ferric ion. If gram molecular weight of potassium dichromate is 294 g, its gram equivalent weight is
  A)
   294 g           
  done clear
  B)
   127g
  done clear
  C)
   49 g           
  done clear
  D)
   24.5 g
  done clear
  View Answer play_arrow

• question_answer53) When\[C{{H}_{2}}=CH-COOH\] is reduced with \[\text{LiAl}{{\text{H}}_{\text{4}}}\text{,}\]the compound obtained will be
  A)
   \[\text{C}{{\text{H}}_{3}}-C{{H}_{2}}-COOH\]
  done clear
  B)
   \[C{{H}_{2}}=CH-C{{H}_{2}}OH\]
  done clear
  C)
   \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}OH\]
  done clear
  D)
   \[C{{H}_{3}}-C{{H}_{2}}-CHO\]
  done clear
  View Answer play_arrow

• question_answer54) Which one of the following compounds has the smallest bond angle in its molecule?
  A)
  \[S{{O}_{2}}\]          
  done clear
  B)
  \[O{{H}_{2}}\]
  done clear
  C)
  \[S{{H}_{2}}\]           
  done clear
  D)
  \[N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer55) For the redox reaction \[Zn(s)+C{{u}^{2+}}(0.1\,M)\xrightarrow{{}}Z{{n}^{2+}}(1.M)+Cu(s)\] taking place in a cell, \[\text{E}_{\text{cell}}^{\text{o}}\]is\[\text{1}\text{.10}\,\text{V}\text{.}{{\text{E}}_{\text{cell}}}\] for the cell will be \[\left( 2.303\frac{RT}{F}=0.0591 \right)\]
  A)
   2.14 V          
  done clear
  B)
   1.80 V
  done clear
  C)
   1.07 V          
  done clear
  D)
   0.82 V
  done clear
  View Answer play_arrow

• question_answer56) The rate law for a reaction between the  substances A and B is given by rate \[=k{{[A]}^{n}}{{[B]}^{m}}.\] On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as
  A)
  \[\frac{1}{{{2}^{m+n}}}\]
  done clear
  B)
   \[(m+n)\]
  done clear
  C)
   \[(n-m)\]
  done clear
  D)
   \[{{2}^{(n-m)}}\]
  done clear
  View Answer play_arrow

• question_answer57) If at 298 K the bond energies of \[C-H,C-C,C=C\]and \[H-H\]bonds are respectively 414, 347,  615 and \[435\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}},\] the value of enthalpy change for the reaction \[{{H}_{2}}C=C{{H}_{2}}(g)+\xrightarrow{{}}{{H}_{3}}C-C{{H}_{3}}(g)\]at \[298\,K\]will be
  A)
  \[+250\,kJ\]
  done clear
  B)
   \[-250\,kJ\]
  done clear
  C)
   \[+125\,kJ\]
  done clear
  D)
   \[-125\,kJ\]
  done clear
  View Answer play_arrow

• question_answer58) Which one of the following characteristics is not correct for physical adsorption?
  A)
   Adsorption on solids is reversible
  done clear
  B)
   Adsorption increases with increase in temperature
  done clear
  C)
   Adsorption is spontaneous
  done clear
  D)
   Both enthalpy and entropy of adsorption are negative
  done clear
  View Answer play_arrow

• question_answer59) The correct order of increasing basic nature for the bases \[\text{N}{{\text{H}}_{\text{3}}}\text{,C}{{\text{H}}_{\text{3}}}\text{N}{{\text{H}}_{\text{2}}}\]and \[{{\text{(C}{{\text{H}}_{\text{3}}}\text{)}}_{\text{2}}}\text{NH}\]is
  A)
  \[C{{H}_{3}}N{{H}_{2}}<N{{H}_{3}}<{{(C{{H}_{3}})}_{2}}NH\]
  done clear
  B)
   \[{{(C{{H}_{3}})}_{2}}NH<N{{H}_{3}}<C{{H}_{3}}N{{H}_{2}}\]
  done clear
  C)
   \[N{{H}_{3}}<C{{H}_{3}}N{{H}_{2}}<{{(C{{H}_{3}})}_{2}}NH\]
  done clear
  D)
   \[C{{H}_{3}}N{{H}_{2}}<{{(C{{H}_{3}})}_{2}}NH<N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer60) Nylon threads are made up of
  A)
   polyvinyl polymer
  done clear
  B)
   polyester polymer
  done clear
  C)
   polyamide polymer
  done clear
  D)
   polyethylene polymer
  done clear
  View Answer play_arrow

• question_answer61) Due to presence of an unpaired electron, free radicals are
  A)
   cations
  done clear
  B)
   anions
  done clear
  C)
   chemically inactive
  done clear
  D)
   chemically reactive
  done clear
  View Answer play_arrow

• question_answer62) The highest electrical conductivity among the following aqueous solutions, is of
  A)
   0.1 M difluoroacetic acid
  done clear
  B)
   0.1 M fluoroacetic acid
  done clear
  C)
   0.1 M chloroacetic acid
  done clear
  D)
   0.1 M acetic acid
  done clear
  View Answer play_arrow

• question_answer63) Aluminium oxide may be electrolysed at \[\text{1000}{{\,}^{\text{o}}}\text{C}\]to furnish aluminium metal (atomic mass\[=27\,u;\,1F=96,500\,C\]). The cathode reaction is Z\[A{{l}^{3+}}+3{{e}^{-}}\xrightarrow{{}}A{{l}^{0}}\] To prepare 5.12 kg of aluminium metal by this method would require
  A)
  \[5.49\,\,\times \,\,{{10}^{1}}C\] of electricity
  done clear
  B)
   \[5.49\,\,\times \,\,{{10}^{4}}C\]of electricity
  done clear
  C)
   \[1.83\times {{10}^{7}}C\]of electricity
  done clear
  D)
  \[5.49\times {{10}^{7}}C\]of electricity
  done clear
  View Answer play_arrow

• question_answer64) The molecular shapes of \[\text{S}{{\text{F}}_{\text{4}}}\text{,}\,\text{Si}{{\text{F}}_{\text{4}}}\]and \[\text{ICl}_{4}^{-}\]are
  A)
   different with 1, 0 and 2 lone pairs of electrons on the central atoms, respectively
  done clear
  B)
   different with 0, 1 and 2 lone pairs of electrons on the central atoms, respectively
  done clear
  C)
   the same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively
  done clear
  D)
   the same with 2, 0 and 1 lone pairs of electrons on the central atoms, respectively
  done clear
  View Answer play_arrow

• question_answer65) Calomel \[(H{{g}_{2}}C{{l}_{2}})\] on reaction with ammonium hydroxide gives
  A)
  \[HgO\]
  done clear
  B)
   \[H{{g}_{2}}O\]
  done clear
  C)
   \[N{{H}_{2}}-Hg-Hg-Cl\]
  done clear
  D)
   \[HgN{{H}_{2}}Cl\]
  done clear
  View Answer play_arrow

• question_answer66) Alkyl halides react with dialkyl copper reagents to give
  A)
   alkenyl halides
  done clear
  B)
   alkanes
  done clear
  C)
   alkyl copper halides               
  done clear
  D)
   alkenes
  done clear
  View Answer play_arrow

• question_answer67) Acid catalysed hydration of alkenes except ethene leads to the formation of
  A)
   mixture of secondary and tertiary alcohols
  done clear
  B)
   mixture of primary and secondary alcohols
  done clear
  C)
   secondary or tertiary alcohol
  done clear
  D)
   primary alcohol
  done clear
  View Answer play_arrow

• question_answer68) An aqueous solution of 6.3 g of oxalic acid dihydrate is made upto 250 mL. The volume of  \[\text{0}\text{.1}\,\text{N}\,\text{NaOH}\]required to completely neutralize 10 mL of this solution is
  A)
   \[\text{40 mL}\]
  done clear
  B)
   \[\text{20 mL}\]
  done clear
  C)
   \[10\,mL\]
  done clear
  D)
   \[4\,mL\]
  done clear
  View Answer play_arrow

• question_answer69) The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity  to stationary state one, would be (Rydberg constant\[=1.097\times {{10}^{7}}\,{{m}^{-1}}\])
  A)
   91 nm
  done clear
  B)
   192 nm                       
  done clear
  C)
   406 nm
  done clear
  D)
   \[9.1\times {{10}^{-8}}\,nm\]
  done clear
  View Answer play_arrow

• question_answer70) Which one of the following aqueous solutions will exhibit highest boiling point?
  A)
   \[0.01\,M\,N{{a}_{2}}S{{O}_{4}}\]
  done clear
  B)
   \[0.01\,M\,KN{{O}_{3}}\]
  done clear
  C)
   \[0.015\,M\,\text{urea}\]
  done clear
  D)
   \[0.015\,M\,\text{glucose}\]
  done clear
  View Answer play_arrow

• question_answer71) Which among the following factors is the most important in making fluorine the strongest oxidising agent?
  A)
   Electron affinity
  done clear
  B)
   Ionisation enthalpy
  done clear
  C)
   Hydration enthalpy
  done clear
  D)
   Bond dissociation energy
  done clear
  View Answer play_arrow

• question_answer72) What is the equilibrium expression for the reaction, \[{{P}_{4}}(s)+5{{O}_{2}}(g){{P}_{4}}{{O}_{10}}(s)?\]
  A)
   \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{[{{P}_{4}}]{{[{{O}_{2}}]}^{5}}}\]
  done clear
  B)
   \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{5[{{P}_{4}}][{{O}_{2}}]}\]
  done clear
  C)
   \[{{K}_{c}}={{[{{O}_{2}}]}^{5}}\]
  done clear
  D)
   \[{{K}_{c}}=\frac{1}{{{[{{O}_{2}}]}^{5}}}\]
  done clear
  View Answer play_arrow

• question_answer73) The enthalpies of combustion of carbon and carbon monoxide are\[-393.5\]and\[-283\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]  respectively. The enthalpy of formation of carbon monoxide per mol is
  A)
  \[110.5\,kJ\]
  done clear
  B)
   \[676.5\,kJ\]
  done clear
  C)
   \[-676.5\,kJ\]
  done clear
  D)
   \[-110.5\,kJ\]
  done clear
  View Answer play_arrow

• question_answer74) Which one of the following ores is best concentrated by froth-floatation method?
  A)
   Magnetite       
  done clear
  B)
   Cassiterite
  done clear
  C)
   Galena          
  done clear
  D)
   Malachite
  done clear
  View Answer play_arrow

• question_answer75) Excess of KI reacts with \[\text{CuS}{{\text{O}}_{\text{4}}}\]solution and then \[\text{N}{{\text{a}}_{\text{2}}}{{\text{S}}_{\text{2}}}{{\text{O}}_{\text{3}}}\]solution is added to it. Which of the statements is incorrect for this reaction?
  A)
  \[\text{C}{{\text{u}}_{\text{2}}}{{\text{I}}_{\text{2}}}\] is formed
  done clear
  B)
  \[\text{Cu}{{\text{I}}_{2}}\] is formed
  done clear
  C)
   \[\text{N}{{\text{a}}_{\text{2}}}{{\text{S}}_{\text{2}}}{{\text{O}}_{\text{3}}}\]is oxidised
  done clear
  D)
   Evolved \[{{\text{I}}_{2}}\] is reduced
  done clear
  View Answer play_arrow

• question_answer76) Which one of the following does not have sp2 hybridised carbon?
  A)
   Acetone         
  done clear
  B)
   Acetic acid
  done clear
  C)
   Acetonitrile      
  done clear
  D)
   Acetamide
  done clear
  View Answer play_arrow

• question_answer77) Which of the following will have a meso-isomer also?
  A)
   2-chlorobutane
  done clear
  B)
   2, 3-dichlorobutane
  done clear
  C)
   2, 3-dichloropentane
  done clear
  D)
   2-hydroxypropanoic acid
  done clear
  View Answer play_arrow

• question_answer78) Consider the acidity of the carboxylic adds (i) \[PhCOOH\] (ii) \[o-N{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] (iii) \[p-N{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] (iv) \[mN{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] Which of the following orders is correct?
  A)
   (i) > (ii) > (iii) > (iv)
  done clear
  B)
   (ii) > (iv) > (iii) > (i)
  done clear
  C)
   (ii) > (iv) > (i) > (iii)
  done clear
  D)
   (ii) > (iii) > (iv) > (i)
  done clear
  View Answer play_arrow

• question_answer79) The   compound   formed   on   heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is
  A)
   gammexane     
  done clear
  B)
   DDT
  done clear
  C)
   freon           
  done clear
  D)
   hexachloroethane
  done clear
  View Answer play_arrow

• question_answer80) The smog is essentially caused by the presence of
  A)
   \[{{O}_{2}}\]and \[{{O}_{3}}\]
  done clear
  B)
   \[{{O}_{2}}\]a and\[{{N}_{3}}\]
  done clear
  C)
   oxides of sulphur and nitrogen
  done clear
  D)
   \[{{O}_{3}}\] and \[{{N}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer81) The radioisotope, tritium \[(_{1}^{3}H)\] has a half-life of 12.3 yr. If the initial amount of tritium is 32 mg,  how many milligrams of it would remain after 49.2 yr?
  A)
   4 mg          
  done clear
  B)
   8 mg
  done clear
  C)
   1 mg          
  done clear
  D)
   2 mg
  done clear
  View Answer play_arrow

• question_answer82) In this reaction \[C{{H}_{3}}CHO+HCN\xrightarrow{{}}C{{H}_{3}}CH(OH)CN\] \[\xrightarrow{\text{H}\text{.OH}}C{{H}_{3}}CH(OH)COOH\] an asymmetric centre is generated. The acid obtained would be
  A)
   50% D + 50% L-isomer
  done clear
  B)
   20% D + 80% L-isomer
  done clear
  C)
   D-isomer
  done clear
  D)
   L-isomer
  done clear
  View Answer play_arrow

• question_answer83) The method of zone refining of metals is based on the principle of
  A)
   greater noble character of the solid metal than that of the impurity
  done clear
  B)
   greater solubility of the impurity in the molten state than in the solid
  done clear
  C)
   greater mobility of the pure metal than that of impurity                  
  done clear
  D)
   higher melting point of the impurity than that of the pure metal
  done clear
  View Answer play_arrow

• question_answer84) The temperature dependence of rate constant \[(k)\] of a chemical reaction is written in terms of Arrhenius equation,\[k=A{{e}^{-E*/RT}}.\] Activation energy \[({{E}^{*}})\]of the reaction can be calculated by ploting                                      
  A)
  \[\log \,k\,vs\frac{1}{T}\]
  done clear
  B)
   \[\log \,k\,vs\frac{1}{\log \,\,T}\]
  done clear
  C)
   \[l\,vs\,T\]
  done clear
  D)
   \[k\,vs\,\frac{1}{\log \,T}\]
  done clear
  View Answer play_arrow

• question_answer85) In a set of the given reactions, acetic acid yielded a product C. \[C{{H}_{3}}COOH+PC{{l}_{5}}\xrightarrow{{}}A\] \[\text{A}\xrightarrow[\text{anhy}\,\text{AlC}{{\text{l}}_{\text{3}}}]{{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}}\text{B}\xrightarrow[\text{ether}]{{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{MgBr}}\text{C}\] Product C would be
  A)
   \[C{{H}_{3}}CH(OH){{C}_{6}}{{H}_{5}}\]
  done clear
  B)
   \[C{{H}_{3}}-\overset{{{C}_{2}}{{H}_{5}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,(OH){{C}_{6}}{{H}_{5}}\]
  done clear
  C)
   \[C{{H}_{3}}CH(OH){{C}_{2}}{{H}_{5}}\]
  done clear
  D)
   \[C{{H}_{3}}CO{{C}_{6}}{{H}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer86) Which one of the following compounds, is nota protonic acid?
  A)
  \[SO{{(OH)}_{2}}\]
  done clear
  B)
   \[S{{O}_{2}}{{(OH)}_{2}}\]
  done clear
  C)
   \[B{{(OH)}_{2}}\]
  done clear
  D)
   \[PO{{(OH)}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer87) \[\text{NaCl,}\,\text{NaBr}\]and \[\text{NaI}\]mixture on heating with  cone. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]gives gases, respectively
  A)
  \[HCl,HBr,HI\]
  done clear
  B)
  \[HCl,B{{r}_{2}},{{I}_{2}}\]
  done clear
  C)
   \[C{{l}_{2}},B{{r}_{2}},{{I}_{2}}\]
  done clear
  D)
  \[C{{l}_{2}},HBr,HI\]
  done clear
  View Answer play_arrow

• question_answer88) The reaction between aniline and nitrous acid at low temperature yields
  A)
   N-nitrosamine   
  done clear
  B)
   diazonium salt
  done clear
  C)
   nitrile            
  done clear
  D)
   amine-nitrite salt
  done clear
  View Answer play_arrow

• question_answer89) The maximum number of molecules is present  in
  A)
   \[15\,L\,\]of \[{{H}_{2}}\]gas at STP
  done clear
  B)
  \[5\,L\,\]of \[{{N}_{2}}\]gas at STP
  done clear
  C)
   \[0.5\,g\,\]of \[{{H}_{2}}\]gas
  done clear
  D)
   \[10\,g\]of \[{{O}_{2}}\]gas
  done clear
  View Answer play_arrow

• question_answer90) Ionic radii are
  A)
   inversely proportional to effective nuclear charge
  done clear
  B)
   inversely proportional to square of effective nuclear charge
  done clear
  C)
   directly proportional to effective nuclear charge
  done clear
  D)
   directly proportional to square of effective nuclear charge
  done clear
  View Answer play_arrow

• question_answer91) The radioactive isotope \[_{\text{27}}^{\text{60}}\text{Co}\]which is used in the treatment of cancer can be made by \[(n,p)\] reaction. For this reaction the target nucleus is
  A)
   \[_{28}^{59}Ni\]
  done clear
  B)
   \[_{27}^{59}Co\]
  done clear
  C)
   \[_{28}^{60}Ni\]
  done clear
  D)
   \[_{27}^{60}Co\]
  done clear
  View Answer play_arrow

• question_answer92) The vapour pressure of two liquids P and Q are 80 and 60 Torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be
  A)
   140 Torr
  done clear
  B)
   20 Torr
  done clear
  C)
   68 Torr
  done clear
  D)
   72 Torr
  done clear
  View Answer play_arrow

• question_answer93) The energy of second Bohr orbit of the hydrogen atom is \[-328\,\text{kJ}\,\text{mo}{{\text{l}}^{-}};\] hence the energy of fourth Bohr orbit would be
  A)
  \[~-41\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}\]
  done clear
  B)
   \[-1312\text{ kJ mo}{{\text{l}}^{-1}}\]
  done clear
  C)
   \[-164\text{ kJ mo}{{\text{l}}^{-1}}\]
  done clear
  D)
  \[~-82\text{ kJ mo}{{\text{l}}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer94) In van der Waals' equation of state of the gas law, the constant ?b? is a measure of
  A)
   intermolecular repulsions
  done clear
  B)
   intermolecular attractions
  done clear
  C)
   volume occupied by the molecules
  done clear
  D)
   intermolecular collisions per unit volume
  done clear
  View Answer play_arrow

• question_answer95) Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
  A)
   Polyhalogens
  done clear
  B)
   Ferrocenes
  done clear
  C)
   Fullerenes
  done clear
  D)
   Freons                       
  done clear
  View Answer play_arrow

• question_answer96) What is the correct IUPAC name of
  A)
   4-methoxy-2-nitrobenzaldehyde
  done clear
  B)
   4-formyl-3-nitro anisole
  done clear
  C)
   4-methoxy-6-nitrobenzaldehyde
  done clear
  D)
   2-formyl-5-methoxy nitrobenzene
  done clear
  View Answer play_arrow

• question_answer97) Which of the following is anhydride of perchloric acid?
  A)
  \[\text{C}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{7}}}\]
  done clear
  B)
   \[\text{C}{{\text{l}}_{\text{2}}}{{\text{O}}_{5}}\]
  done clear
  C)
   \[\text{C}{{\text{l}}_{\text{2}}}{{\text{O}}_{3}}\]
  done clear
  D)
   \[HClO\]
  done clear
  View Answer play_arrow

• question_answer98) The concentration of \[{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\]solution of ?10 volume' is
  A)
   30%         
  done clear
  B)
   3%
  done clear
  C)
   1%           
  done clear
  D)
   10%
  done clear
  View Answer play_arrow

• question_answer99) The dipole moment of \[\text{HBr}\]is \[\text{1}\text{.6}\times {{10}^{-30}}\,C-m\]and inter-atomic spacing is\[1\overset{\text{o}}{\mathop{\text{A}}}\,.\]The % ionic character of \[\text{HBr}\]is
  A)
   7              
  done clear
  B)
   10
  done clear
  C)
   15             
  done clear
  D)
   27
  done clear
  View Answer play_arrow

• question_answer100) \[Ca{{C}_{2}}+{{N}_{2}}\xrightarrow{{}}A,\]product A is
  A)
   \[CaC{{N}_{2}}\]
  done clear
  B)
  \[CaC{{N}_{2}}\]and C
  done clear
  C)
  \[CaC{{N}_{2}}+{{N}_{2}}\]
  done clear
  D)
   None of these 
  done clear
  View Answer play_arrow

• question_answer101) Which pigment involved in photoperiodic change in plants?
  A)
   Phytochrome    
  done clear
  B)
   Cytochrome
  done clear
  C)
   Chlorophyll     
  done clear
  D)
   Anthocyanin
  done clear
  View Answer play_arrow

• question_answer102) Blood vascular system of earthworm is
  A)
   open type with Hb in RBC
  done clear
  B)
   open type with Hb in plasma
  done clear
  C)
   closed type with Hb in RBC
  done clear
  D)
   closed type with Hb in plasma
  done clear
  View Answer play_arrow

• question_answer103) Succus entericus is
  A)
   intestinal juice   
  done clear
  B)
   gastric juice
  done clear
  C)
   bile juice         
  done clear
  D)
   salivary juice
  done clear
  View Answer play_arrow

• question_answer104) Synthesis of urea occurs in
  A)
   kidney          
  done clear
  B)
   liver
  done clear
  C)
   gallbladder     
  done clear
  D)
   urinary bladder
  done clear
  View Answer play_arrow

• question_answer105) A wastage process is
  A)
   respiration      
  done clear
  B)
   photosynthesis
  done clear
  C)
   photorespiration
  done clear
  D)
   movement
  done clear
  View Answer play_arrow

• question_answer106) Lateral roots arise from
  A)
   pericycle        
  done clear
  B)
   cortex
  done clear
  C)
   endodermis      
  done clear
  D)
   stele
  done clear
  View Answer play_arrow

• question_answer107) Photosynthetic products translocated in the form of
  A)
   glucose          
  done clear
  B)
   sucrose
  done clear
  C)
   maltose          
  done clear
  D)
   starch
  done clear
  View Answer play_arrow

• question_answer108) Cell membrane controls
  A)
   exocytosis
  done clear
  B)
   endocytosis
  done clear
  C)
   Both [a] and [b]
  done clear
  D)
   not controles movement of substances
  done clear
  View Answer play_arrow

• question_answer109) Submerged hydrophytes shows
  A)
    stomata
  done clear
  B)
   abundant air sacs                 
  done clear
  C)
   developed mechanical tissue
  done clear
  D)
   secondary growth
  done clear
  View Answer play_arrow

• question_answer110) Which is not a reflex action?
  A)
   Salivation
  done clear
  B)
   Eye opening and closing
  done clear
  C)
   Response to pinching pin in a frog leg
  done clear
  D)
   Sweating
  done clear
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• question_answer111) Which is a correct pair of a pathogen and its vector?
  A)
   Plasmodium and Anopheles
  done clear
  B)
   Plasmodium and Culex
  done clear
  C)
   Virus and Anopheles
  done clear
  D)
   Protozoan and Aedes
  done clear
  View Answer play_arrow

• question_answer112) Vascular bundle in which two patches of phloem are present on both side of xylem is
  A)
   collateral        
  done clear
  B)
   bicollateral
  done clear
  C)
   concentric       
  done clear
  D)
   radial
  done clear
  View Answer play_arrow

• question_answer113) Presence of persistant calyx is a feature of family
  A)
   Solanaceae     
  done clear
  B)
   Gramineae
  done clear
  C)
   Malvaceae      
  done clear
  D)
   Compositae
  done clear
  View Answer play_arrow

• question_answer114) Amphimixis is
  A)
   fusion of sperm with egg
  done clear
  B)
   fusion of pronucleus of sperm with of egg
  done clear
  C)
   no fusion
  done clear
  D)
   fusion of diploid cells
  done clear
  View Answer play_arrow

• question_answer115) Addison of which elements in water, speed up the metamorphosis in frog tadpole larva?
  A)
   \[{{I}_{2}}\]              
  done clear
  B)
  \[K\]
  done clear
  C)
   Na             
  done clear
  D)
  \[Cl\]
  done clear
  View Answer play_arrow

• question_answer116) Steroid hormones work as
  A)
   they enter into target cells and binds with specific receptor and activates specific genes to form protein
  done clear
  B)
   they binds to cell membrane
  done clear
  C)
   they catalyse formation of c-AMP
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer117) In a double stranded DNA, the sequence of bases in one strand is AGCTAAGC. What is the complementary sequence on the other strand?
  A)
   TCGATTCG    
  done clear
  B)
   VCGAUUCG
  done clear
  C)
   AGCTAAGC    
  done clear
  D)
   CAUTAUCG
  done clear
  View Answer play_arrow

• question_answer118) Renal portal system is
  A)
   present in all vertebrates
  done clear
  B)
   present in all chordates
  done clear
  C)
   absent in mammals
  done clear
  D)
   present in all mammals
  done clear
  View Answer play_arrow

• question_answer119) Most diverse organism of an ecosystem is
  A)
   producer       
  done clear
  B)
   consumer
  done clear
  C)
   decomposer     
  done clear
  D)
   carnivores
  done clear
  View Answer play_arrow

• question_answer120) Which is correct for artery?
  A)
   Thick walled in which blood flow at high pressure
  done clear
  B)
   Thin walled blood flow with low pressure
  done clear
  C)
   Thick walled and blood flow low pressure
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer121) Which is correct for bacteria?
  A)
   They have both cyclic and non-cyclic photo phosphorylation
  done clear
  B)
   They absorb light > 900 nm of wavelength
  done clear
  C)
   They release \[{{\text{O}}_{\text{2}}}\] during photosynthesis
  done clear
  D)
   They use\[{{\text{H}}_{\text{2}}}\text{O}\] during photosynthesis
  done clear
  View Answer play_arrow

• question_answer122) Which of the following is exhaustible but limited source of energy?
  A)
   Nuclear fuels    
  done clear
  B)
   Water energy
  done clear
  C)
   Fossil fuels      
  done clear
  D)
   Solar energy
  done clear
  View Answer play_arrow

• question_answer123) A pollutant can be best defined as it
  A)
   has natural geochemical cycles
  done clear
  B)
   changes homeostasis of environment
  done clear
  C)
   disturb natural flora of a place
  done clear
  D)
   become stabilized in ecosystem forever
  done clear
  View Answer play_arrow

• question_answer124) Disorder related with thyroid gland is
  A)
   diabetes mellitus
  done clear
  B)
   hypercalcemia
  done clear
  C)
   osteoporosis     
  done clear
  D)
   myxedema
  done clear
  View Answer play_arrow

• question_answer125) \[{{\text{C}}_{4}}-\]pathway for \[\text{C}{{\text{O}}_{\text{2}}}-\]fixation was proposed by
  A)
   Benson and associates
  done clear
  B)
   Arnon and associates
  done clear
  C)
   Rouhani et \[al\]
  done clear
  D)
   Hatch et \[al,\]
  done clear
  View Answer play_arrow

• question_answer126) Stink gland is found in
  A)
   4th and 5th terga of cockroach
  done clear
  B)
   5th and 6th terga of cockroach
  done clear
  C)
   5th and 6th sterna of cockroach
  done clear
  D)
   4th and 5th sterna of cockroach
  done clear
  View Answer play_arrow

• question_answer127) First mammal occur in which era-period?
  A)
   Permian-Palaeozoic
  done clear
  B)
   Triassic-Mesozoic
  done clear
  C)
   Tertiary-Coenozoic
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer128) When temperature decreases  oxyhaemoglobin curve will become
  A)
   more steep
  done clear
  B)
   straight
  done clear
  C)
   parabola
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer129) Regeneration of liver is
  A)
   metamorphosis
  done clear
  B)
   repairative regeneration
  done clear
  C)
   epimorphosis
  done clear
  D)
   morphogenesis
  done clear
  View Answer play_arrow

• question_answer130) Deamination occurs in
  A)
   kidney          
  done clear
  B)
   liver
  done clear
  C)
   nephron        
  done clear
  D)
   Both [a] and [b]
  done clear
  View Answer play_arrow

• question_answer131) Struggle for existence and survival of the fittest theories were given by
  A)
   Wallace         
  done clear
  B)
   Darwin
  done clear
  C)
   Lamarck        
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer132) Digestion of protein is completed in
  A)
   stomach
  done clear
  B)
   duodenum
  done clear
  C)
   ileum                      
  done clear
  D)
   Both [b] and [c]
  done clear
  View Answer play_arrow

• question_answer133) Fight and flight hormone is
  A)
   adrenaline      
  done clear
  B)
   thyroxine
  done clear
  C)
   ADH            
  done clear
  D)
   oxytocin
  done clear
  View Answer play_arrow

• question_answer134) Myelin sheath is derived from
  A)
   neuroglial cells  
  done clear
  B)
   Schwann cells
  done clear
  C)
   nerve cells       
  done clear
  D)
   All of these
  done clear
  View Answer play_arrow

• question_answer135) Bidder's canal is found in
  A)
   testes of frog    
  done clear
  B)
   kidney of frog
  done clear
  C)
   kidney of rabbit 
  done clear
  D)
   Both [a] and [c]
  done clear
  View Answer play_arrow

• question_answer136) Keratinized dead layer of skin is made up of
  A)
   stratified squamous
  done clear
  B)
   simple cuboidal
  done clear
  C)
   simple columnar
  done clear
  D)
   stratified columnar
  done clear
  View Answer play_arrow

• question_answer137) Cristae are associated with which of the following?
  A)
   Mitochondria
  done clear
  B)
   Cytoplasm
  done clear
  C)
   Protoplasm
  done clear
  D)
   Endoplasmic reticulum
  done clear
  View Answer play_arrow

• question_answer138) Which of the following symbols are used for representing chromosome of birds?
  A)
   ZZ-ZW       
  done clear
  B)
   XX-XY
  done clear
  C)
   XO-XX        
  done clear
  D)
   ZZ-WW
  done clear
  View Answer play_arrow

• question_answer139) Genotypic ratio of a monohybrid cross is
  A)
   1:2:1         
  done clear
  B)
   3:1
  done clear
  C)
   9:3:3:1      
  done clear
  D)
   1:1:1
  done clear
  View Answer play_arrow

• question_answer140) Mesogamy is
  A)
   fusion of male and female gametes
  done clear
  B)
   fusion of physiologically similar and morphologically different gametes
  done clear
  C)
   entry of pollen tube through integuments
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer141) Most of the economically important fibre yielding plants belong to family
  A)
   Malvaceae      
  done clear
  B)
   Solanaceae
  done clear
  C)
   Cruciferae       
  done clear
  D)
   Poaceae
  done clear
  View Answer play_arrow

• question_answer142) Provirus is
  A)
   a free virus                                      
  done clear
  B)
   primitive virus
  done clear
  C)
   integrated viral genome
  done clear
  D)
   a free DNA
  done clear
  View Answer play_arrow

• question_answer143) If root of a flowering plant has 24 chromosomes, then its gamete has how many chromosomes?
  A)
   24              
  done clear
  B)
   12
  done clear
  C)
   4               
  done clear
  D)
   8
  done clear
  View Answer play_arrow

• question_answer144) Nitrite is converted to nitrate by
  A)
   Nitrosomonas    
  done clear
  B)
   Nitrobacter
  done clear
  C)
   Pseudomonas    
  done clear
  D)
   Clostridium
  done clear
  View Answer play_arrow

• question_answer145) Collenchyma is
  A)
   living and contains protoplasm
  done clear
  B)
   dead and hollow
  done clear
  C)
   dead and filled with reserve food
  done clear
  D)
   living and contains no reserve food
  done clear
  View Answer play_arrow

• question_answer146) Gametophytic and sporophytic phases are independent in
  A)
   pteridophyte    
  done clear
  B)
   bryophyte
  done clear
  C)
   gymnosperms   
  done clear
  D)
   phaeophytes
  done clear
  View Answer play_arrow

• question_answer147) Number of archegonia in Cycas is
  A)
   8               
  done clear
  B)
   4
  done clear
  C)
   1                
  done clear
  D)
   2
  done clear
  View Answer play_arrow

• question_answer148) Extinction of a species in a food chain is compensated by
  A)
   food chain
  done clear
  B)
   ecological pyramid
  done clear
  C)
   food web
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer149) Pyramid of energy in aquatic ecosystem is
  A)
   always upright  
  done clear
  B)
   always inverted
  done clear
  C)
   bell-shaped     
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer150) Photosynthesis is maximum in
  A)
   green light
  done clear
  B)
   blue followed by red light
  done clear
  C)
   red followed by blue light
  done clear
  D)
   blue light
  done clear
  View Answer play_arrow