Solved papers for JCECE Medical JCECE Medical Solved Paper-2013

done JCECE Medical Solved Paper-2013 Total Questions - 150

• question_answer1) A boat can go across a lake and return in time \[{{T}_{0}}\]at a speed \[\upsilon .\]On a rough day there is a uniform current at speed \[{{\upsilon }_{1}}\] to help the onward journey and impede the return journey. If the time taken to go across and return on the same day be T, then \[T/{{T}_{0}}\]will be
  A)
  \[\frac{1}{(1-v_{1}^{2}/{{v}^{2}})}\]
  done clear
  B)
   \[\frac{1}{(1+v_{1}^{2}/{{v}^{2}})}\]
  done clear
  C)
   \[(1-v_{1}^{2}/{{v}^{2}})\]
  done clear
  D)
   \[\left( 1+\frac{v_{1}^{2}}{{{v}^{2}}} \right)\]
  done clear
  View Answer play_arrow

• question_answer2) If a balloon of mass M is descending down with an acceleration \[a(<g),\]then what is the value of mass \[m\] (of its contents) that must be removed so that it starts moving up with an acceleration a?
  A)
  \[\frac{Ma}{(g+a)}\]
  done clear
  B)
   \[\frac{2Ma}{(g+a)}\]
  done clear
  C)
   \[\frac{M}{(g+a)}\]
  done clear
  D)
   Not possible
  done clear
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• question_answer3) If for a spherical mirror object distance, \[u=(50.1\,\pm \,0.5)\,cm\]and image distance \[\upsilon =(20.1\,\pm \,0.2)\,cm,\]then focal length of the spherical mirror will be
  A)
  \[(14.3\,\pm \,0.1)\,cm\]
  done clear
  B)
   \[(14.3\,\pm \,0.5)\,cm\]
  done clear
  C)
   \[(30.1\,\pm \,0.1)\,cm\]
  done clear
  D)
   \[(25.3\,\pm \,0.5)\,cm\]
  done clear
  View Answer play_arrow

• question_answer4) The susceptibility and permeability of a perfectly diamagnetic substance is
  A)
   1 and 0          
  done clear
  B)
   0 and 1
  done clear
  C)
   -1 and 0         
  done clear
  D)
   -1 and 1
  done clear
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• question_answer5) If a current carrying circular loop is placed in a \[x-y\] plane as shown in adjoining figure and a magnetic field is applied along \[z-\]axis, then the loop will
  A)
   contract
  done clear
  B)
   expand
  done clear
  C)
   move towards \[-\text{ }x-\]axis
  done clear
  D)
   move towards \[+\,x-\]axis
  done clear
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• question_answer6) If the three vectors A,B and C satisfy the relation \[A.B=0\]and \[A.C=0,\]then vector A  is parallel to
  A)
   A                   
  done clear
  B)
   B
  done clear
  C)
  \[A\times B\]                
  done clear
  D)
  \[~B\times C\]
  done clear
  View Answer play_arrow

• question_answer7) A car weighing \[\text{2}\,\text{ }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{3}}}\,\text{kg}\]and moving at \[20\text{ }m/s\]along a main road collides with a lorry of mass \[8\times {{10}^{3}}\,kg\]which emerges at \[5\text{ }m/s\]from a cross road at right angle to the main road. If the two vehicles lock, what will be their velocity after the collision?
  A)
  \[4/\sqrt{2}\,m/s,\,{{45}^{o}}\] with cross road
  done clear
  B)
  \[4/\sqrt{2}\,m/s,\,{{45}^{o}}\] with main road
  done clear
  C)
  \[4/\sqrt{2}\,m/s,\,{{60}^{o}}\] with cross road
  done clear
  D)
   \[4/\sqrt{2}\,m/s,\,{{60}^{o}}\]with main road
  done clear
  View Answer play_arrow

• question_answer8) If a water particle of mass 10 mg and having a charge of \[1.5\times {{10}^{-6}}C\]stays suspended in a room, then the magnitude and direction of electric field in the room is
  A)
   \[15\text{ }N/C,\]vertically upwards
  done clear
  B)
   \[15\text{ }N/C,\]vertically dowards
  done clear
  C)
   \[65.3\text{ }N/C,\]vertically upwards
  done clear
  D)
   \[65.3\text{ }N/C,\]vertically downwards
  done clear
  View Answer play_arrow

• question_answer9) In the adjoining figure, \[E=5\,V=r=1\,\Omega ,\,\]\[{{R}_{2}}=4\,\Omega ,\,{{R}_{1}}={{R}_{3}}=1\,\Omega \] and \[C=3\mu F.\]The numerical value of the charge on each plate of the capacitor is
  A)
   \[3\mu C\]
  done clear
  B)
   \[6\mu C\]
  done clear
  C)
   \[12\mu C\]
  done clear
  D)
   \[24\mu C\]
  done clear
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• question_answer10) Find out the value of current through \[2\,\Omega \] resistance for the given circuit
  A)
   zero   
  done clear
  B)
   2A     
  done clear
  C)
   4 A    
  done clear
  D)
   5 A
  done clear
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• question_answer11) A pure resistive circuit element X when connected to an AC supply of peak voltage 200 V gives a peak current of 5 A. A second current element Y when connected to same AC supply gives the same value of peak current but the current lags behind by \[{{90}^{o}}.\] If series. combination of X and Y is connected to the same supply, what is the impedance of the circuit?
  A)
  \[40\,\Omega \]
  done clear
  B)
  \[80\,\Omega \]    
  done clear
  C)
   \[40\sqrt{2}\,\Omega \]
  done clear
  D)
   \[2\sqrt{40}\,\Omega \]
  done clear
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• question_answer12) Two circular coils C and D have equal number of turns and carry equal currents in the same direction in the same sense and subtend same solid angle at point O as shown in figure. The smaller coil C is midway between O and D. If we represent magnetic field induction due to bigger coil and smaller coil C as \[{{B}_{D}}\]and \[{{B}_{C}}\] respectively, then \[{{B}_{D}}/{{B}_{C}}\]is            
  A)
   1:4
  done clear
  B)
   1:2
  done clear
  C)
   2:1
  done clear
  D)
   1:1
  done clear
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• question_answer13) Equal volume of two immiscible liquids of densities \[\rho \]and \[2\rho \]are filled in a vessel as shown in figure. Two small holes are made at depth \[\frac{h}{2}\]and \[\frac{3h}{2}\] from the surface of lighter liquid. If \[{{\upsilon }_{1}}\]and \[{{\upsilon }_{2}}\]are the velocities of efflux at these two holes, then \[{{\upsilon }_{1}}/{{\upsilon }_{2}}\]will be
  A)
  \[\frac{1}{\sqrt{2}}\]
  done clear
  B)
   \[\frac{1}{2\sqrt{2}}\]
  done clear
  C)
   \[\frac{1}{2}\]
  done clear
  D)
    \[\frac{1}{4}\]
  done clear
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• question_answer14) Three conducting rods of same   material   and cross-section       are connected as shown in figure. Temperatures of A, D   and   C   are maintained at \[20{{\,}^{o}}C,\]\[90{{\,}^{o}}C\]and \[0{{\,}^{o}}C.\]  If there is no flow of heat in AB, then ratio of the lengths of BC and BD is
  A)
   2/9                 
  done clear
  B)
   9/2
  done clear
  C)
   2/7                 
  done clear
  D)
   7/2
  done clear
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• question_answer15) If two air columns of lengths 100 cm and 101 cm sounding in their fundamental note gave 17 beats in 20 seconds, then the velocity of sound will be
  A)
   277.8m/s           
  done clear
  B)
   300 m/s
  done clear
  C)
   250 m/s             
  done clear
  D)
   343.4 m/s
  done clear
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• question_answer16) If two springs of spring constants \[{{k}_{1}}\] and \[{{k}_{2}}\]while  executing SHM have equal highest velocities, then the ratio of their amplitudes will be (their masses are in ratio 1:2)
  A)
  \[\sqrt{2{{k}_{2}}/{{k}_{1}}}\]
  done clear
  B)
   \[\sqrt{2{{k}_{1}}/{{k}_{2}}}\]
  done clear
  C)
   \[2{{k}_{1}}/{{k}_{2}}\]
  done clear
  D)
   \[2{{k}_{2}}/{{k}_{1}}\]
  done clear
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• question_answer17) In the adjoining circuit of logic gate, the output Y becomes zero if the inputs are
  A)
  \[A=1,\text{ }B=1,C=0\]      
  done clear
  B)
   \[A=0,\text{ }B=0,\text{ }C=0\]
  done clear
  C)
  \[~A=0,\text{ }B=1,\text{ }C=1\]       
  done clear
  D)
  \[~A=1,\text{ }B=0,\text{ }C=0\]
  done clear
  View Answer play_arrow

• question_answer18) LANDSAT series of satellites move in near polar orbits at an altitude of
  A)
   512 km
  done clear
  B)
   918 km 
  done clear
  C)
   3000 km
  done clear
  D)
   3600 km
  done clear
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• question_answer19) The intensity of gamma radiation from a given source is \[I.\,\] If on passing through 36 mm of lead its intensity is reduced to \[\frac{I}{8},\]then what will be the thickness of lead which reduces its intensity to \[\frac{I}{2}?\]
  A)
   6 mm  
  done clear
  B)
   9 mm  
  done clear
  C)
   12 mm
  done clear
  D)
   18 mm
  done clear
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• question_answer20) An unpolarized beam of light is incident on a group of four polarizing sheets, which are arranged in such a way that the characteristic direction of each polarizing sheet makes an angle of \[{{30}^{o}}.\]with that of the preceding sheet. The fraction of incident unpolarized light transmitted is
  A)
  \[\frac{27}{128}\]
  done clear
  B)
   \[\frac{128}{27}\]
  done clear
  C)
   \[\frac{37}{128}\]
  done clear
  D)
   \[\frac{128}{37}\]
  done clear
  View Answer play_arrow

• question_answer21) Two coherent sources of intensity ratio p interfere. Then, the value\[({{I}_{\max }}-{{I}_{\min }})/({{I}_{\max }}+{{I}_{\min }})\]is
  A)
  \[\frac{1+\beta }{\sqrt{\beta }}\]
  done clear
  B)
   \[\sqrt{\frac{1+\beta }{\beta }}\]
  done clear
  C)
   \[\frac{1+\beta }{2\sqrt{\beta }}\]
  done clear
  D)
   \[\frac{2\sqrt{\beta }}{1+\beta }\]
  done clear
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• question_answer22) A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it?
  A)
   60 cm           
  done clear
  B)
   50 cm
  done clear
  C)
   30 cm           
  done clear
  D)
   20 cm
  done clear
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• question_answer23) If a charge \[-150\text{ }nC\]is given to a concentric spherical shell and a charge \[+\text{ }50\text{ }nC\]is placed at  its centre, then the charge on inner and outer surface of the shell is
  A)
  \[50\,nC,100\,nC\]     
  done clear
  B)
  \[~-\text{ }50\,nC,-\text{ }100\,nC\]
  done clear
  C)
  \[~50\text{ }nC,\text{ }200\text{ }nC\]       
  done clear
  D)
  \[~-\text{ }50\,nC,-200\text{ }nC\]
  done clear
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• question_answer24) Find out the equivalent resistance between A  and B in the network of resistances shown in adjoining figure
  A)
   \[25\,\Omega \]
  done clear
  B)
   \[10\,\Omega \]
  done clear
  C)
  \[5\,\Omega \]                 
  done clear
  D)
   None of these
  done clear
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• question_answer25) In the adjoining figure, if 10 calorie heat is produced per second in, \[5\,\Omega \]resistor due to the flow of current through it, then the heat produced in \[6\,\Omega \] resistor is
  A)
  \[\text{1 cal/s}\]                 
  done clear
  B)
  \[\text{2 cal/s}\]
  done clear
  C)
  \[\text{3 cal/s}\]                 
  done clear
  D)
  \[\text{4 cal/s}\]
  done clear
  View Answer play_arrow

• question_answer26) A rod of length L rotates about an axis passing through one of its ends and perpendicular to its plane. If the linear mass density of the rod varies as \[\rho =(A{{r}^{3}}+B)\,kg/m,\]then the moment of inertia of the rod about the given axis of rotation is
  A)
  \[\frac{{{L}^{3}}}{3}\left[ \frac{A{{L}^{3}}}{2}+B \right]\]
  done clear
  B)
   \[\frac{L}{3}\left[ \frac{A{{L}^{2}}}{2}+B \right]\]
  done clear
  C)
   \[\frac{{{L}^{3}}}{3}\left[ \frac{A}{2}+B \right]\]
  done clear
  D)
   None of the above
  done clear
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• question_answer27) If a force of 4 N is applied on a body of mass \[20\text{ }kg,\] then the work done in 3rd second will be
  A)
   1.2 J
  done clear
  B)
   2 J
  done clear
  C)
   4 J               
  done clear
  D)
   16 J
  done clear
  View Answer play_arrow

• question_answer28) A body is projected with velocity \[{{\upsilon }_{1}}\]from the point A, another body at the same time is projected vertically upwards from B with velocity 1:2 as shown in adjoining figure. If the point B lies vertically below the highest point C, then for both bodies to collide the ratio \[\frac{{{\upsilon }_{2}}}{{{\upsilon }_{1}}}\] should be      
  A)
   0.5
  done clear
  B)
   1
  done clear
  C)
   \[\frac{\sqrt{3}}{2}\]
  done clear
  D)
   \[\frac{2}{\sqrt{3}}\]
  done clear
  View Answer play_arrow

• question_answer29) A police van moving on a highway with a speed of 30 km/h fires a bullet at a thief s car speeding away in the same direction with a speed of 192 km/h. If the muzzle speed of the bullet is 150 km/h, with what speed does the bullet hit the thief s car?
  A)
   105 m/s
  done clear
  B)
   205 m/s
  done clear
  C)
   210 m/s
  done clear
  D)
   250 m/s
  done clear
  View Answer play_arrow

• question_answer30) A machine gun of mass 10 kg fires 30 g bullets at the rate of 6 bullets/s with a speed of 400  m/s. The force required to keep the gun in position will be
  A)
   30 N    
  done clear
  B)
   40 N    
  done clear
  C)
   72 N    
  done clear
  D)
   400 N
  done clear
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• question_answer31) A body of mass 0.1 kg when rotated in a circular path of diameter 1.0 m on a frictionless horizontal plane by means of string, makes 10 revolutions in 31.4 seconds. The centripetal force acting on the body will be
  A)
   0.2N  
  done clear
  B)
   0.1 N   
  done clear
  C)
   2 N    
  done clear
  D)
   1 N
  done clear
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• question_answer32) A plane electromagnetic wave propagating in \[x\,(-)\]direction as a wave function (in SI units) is given as \[\psi (x,t)={{10}^{3}}\sin \pi (3\times {{10}^{6}}x-9\times {{10}^{4}}t)\] The speed of the wave is
  A)
  \[3\times {{10}^{5}}\,m/s\]
  done clear
  B)
   \[3\times {{10}^{7}}\,m/s\]
  done clear
  C)
   \[3\times {{10}^{8}}\,m/s\]
  done clear
  D)
   \[3\times {{10}^{14}}\,m/s\]
  done clear
  View Answer play_arrow

• question_answer33) A thin lens of focal length \[f\]and aperture diameter \[d\] forms an image of intensity\[I.\]If the central part of the aperture upto diameter \[d/2\]is blocked by an opaque paper, then the new focal length and intensity of image will be
  A)
   \[\frac{f}{2},\frac{l}{2}\]
  done clear
  B)
   \[\frac{f}{2},\frac{3}{4}l\]
  done clear
  C)
   \[f,\frac{l}{2}\]
  done clear
  D)
   \[f,\frac{3}{4}l\]
  done clear
  View Answer play_arrow

• question_answer34) Light of wavelength \[\lambda \] strikes a photo sensitive surface and electrons are ejected with kinetic energy E. If the kinetic energy is to be increased to 2E, then the wavelength must be changed to \[\lambda ,\]where
  A)
  \[\lambda >\lambda \]
  done clear
  B)
  \[\lambda =\frac{\lambda }{2}\]
  done clear
  C)
   \[\lambda =2\lambda \]
  done clear
  D)
   \[\frac{\lambda }{2}<\lambda <\lambda \]
  done clear
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• question_answer35) In a photo electric effect experiment, the maximum kinetic energy of the emitted electrons is \[1\,eV\]for incoming radiation of frequency \[{{v}_{0}}\]and \[\text{3 eV}\]for incoming radiation of frequency \[\text{3}{{\text{V}}_{0}}/2.\] What is the maximum kinetic energy of the electrons emitted for incoming radiations of frequency \[\text{9}{{\text{V}}_{0}}/4?\]
  A)
   3 eV              
  done clear
  B)
   4.5 eV
  done clear
  C)
   6 eV              
  done clear
  D)
   9 eV
  done clear
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• question_answer36) If the energy of hydrogen atom in the ground state is \[-13.6\text{ eV,}\] then energy of \[\text{H}{{\text{e}}^{+}}\] ion in first excited state will be
  A)
  \[6.8\,eV\]
  done clear
  B)
   \[-13.6\,eV\]
  done clear
  C)
   \[-27.2\,eV\]
  done clear
  D)
   \[-54.4\,eV\]
  done clear
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• question_answer37) In a nuclear fission, 0.1% mass is converted into energy. The energy released by the fission of 1 kg mass will be
  A)
  \[9\times {{10}^{3}}\,J\]
  done clear
  B)
   \[9\times {{10}^{16}}\,J\]
  done clear
  C)
   \[9\times {{10}^{17}}\,J\]
  done clear
  D)
   \[9\times {{10}^{19}}\,J\]
  done clear
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• question_answer38) For a transistor in common base, the current gain is 0.95. If the load resistance is \[400\,k\Omega \] and input resistance is \[200\,k\Omega ,\] then the voltage gain and power gain will be
  A)
   1900 and ,1800
  done clear
  B)
   1900 and 1805
  done clear
  C)
   5525 and 3591.
  done clear
  D)
   1805 and 1900
  done clear
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• question_answer39) In the middle of the depletion layer of a  reverse biased \[p-n\]junction, the
  A)
   potential is zero
  done clear
  B)
   potential is maximum
  done clear
  C)
   electric field is maximum
  done clear
  D)
   electric field is zero
  done clear
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• question_answer40) In amplitude modulation, the total modulation index should not exceed one because
  A)
   the signal will be distorted
  done clear
  B)
   the amplifier will be damaged
  done clear
  C)
   the signal will die out quickly
  done clear
  D)
   the system will fail
  done clear
  View Answer play_arrow

• question_answer41) Let a beam of wavelength \[\lambda \] falls on parallel reflecting planes with separation \[d,\]then the angle \[\theta \] that the beam should make with the planes so that reflected beams from successive planes may interfere constructively should be (where,\[n=1,2,...\])
  A)
  \[{{\cos }^{-1}}\left( \frac{n\lambda }{2d} \right)\]
  done clear
  B)
   \[{{\sin }^{-1}}\left( \frac{n\lambda }{2d} \right)\]
  done clear
  C)
   \[{{\sin }^{-1}}\left( \frac{n\lambda }{d} \right)\]
  done clear
  D)
  \[{{\tan }^{-1}}\left( \frac{n\lambda }{d} \right)\]
  done clear
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• question_answer42) The dimensions of angular momentum/ magnetic moment are
  A)
  \[[M{{A}^{-1}}{{T}^{-1}}]\]
  done clear
  B)
   \[[{{M}^{-1}}A{{T}^{-1}}]\]
  done clear
  C)
   \[[MA{{T}^{-1}}]\]
  done clear
  D)
   \[[M{{A}^{-1}}T]\]
  done clear
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• question_answer43) A weight mg is suspended from the middle of a rope whose ends are at same level. If the rope is no longer horizontal, the minimum tension required to completely straighten the rope will be                      
  A)
  \[mg\]     
  done clear
  B)
  \[\sqrt{mg}\]
  done clear
  C)
   Infinite  
  done clear
  D)
   zero
  done clear
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• question_answer44) Two triodes having amplification factors 30 and 21 and plate resistances \[5\,k\Omega \] and \[4\,k\Omega \] respectively are connected in parallel. The composite amplification factor of the system is
  A)
   25                
  done clear
  B)
   50
  done clear
  C)
   75                
  done clear
  D)
   100
  done clear
  View Answer play_arrow

• question_answer45) A deflection magnetometer works on
  A)
   Coulombs law
  done clear
  B)
   Tangent law
  done clear
  C)
   Curie law                                   
  done clear
  D)
   The law of vibration of a magnet
  done clear
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• question_answer46) If a magnet is dropped along the axial line off a horizontally held copper ring, then the acceleration of the magnet while it passing through the ring will
  A)
   less than that due to gravity
  done clear
  B)
   equal to that due to gravity
  done clear
  C)
   more than that due to gravity
  done clear
  D)
   depend on the size of the ring and magnet
  done clear
  View Answer play_arrow

• question_answer47) A clock which keeps correct time at \[20{{\,}^{o}}C,\] is subjected to \[40{{\,}^{o}}C.\]If coefficient of lineal expansion, of the pendulum is \[12\times {{10}^{-6}}/{{\,}^{o}}C,\]then how much will it gain or loss in time?
  A)
   5s/day            
  done clear
  B)
   10.3s/day
  done clear
  C)
   20.6 s/day          
  done clear
  D)
   20 min/day
  done clear
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• question_answer48) The resistance of a resistance thermometel have values 2.71 and 3.70 ohms at \[10{{\,}^{o}}C\]and \[100{{\,}^{o}}C\]respectively. The temperature at which the resistance is 3.26 ohm is
  A)
  \[40{{\,}^{o}}C\]              
  done clear
  B)
  \[50{{\,}^{o}}C\]
  done clear
  C)
   \[60{{\,}^{o}}C\]              
  done clear
  D)
  \[7\,0{{\,}^{o}}C\]
  done clear
  View Answer play_arrow

• question_answer49) If the earth were to rotate faster than its present speed, the weight of an object will
  A)
   increase at the equator but remain unchanged at the poles
  done clear
  B)
   decrease at the equator but remain unchanged at the poles
  done clear
  C)
   decrease at the poles but remain  unchanged at the equator
  done clear
  D)
   increase at the pole but remain unchanged at the equator
  done clear
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• question_answer50) A coil is wound on a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remains the same, the self inductance increases by a factor of
  A)
   4
  done clear
  B)
   8
  done clear
  C)
   12
  done clear
  D)
   16
  done clear
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• question_answer51) A drop of water is about 0.05 mL. The density of, water at room temperature is about \[1.0\,\text{m}{{\text{L}}^{-1}}.\] The number of water molecules present in a drop of water are.
  A)
  \[1.67\times {{10}^{21}}{{H}_{2}}O\]molecules
  done clear
  B)
   \[1.67\times {{10}^{26}}{{H}_{2}}O\]molecules
  done clear
  C)
   \[1.806\times {{10}^{23}}{{H}_{2}}O\]molecules
  done clear
  D)
   \[1.806\times {{10}^{21}}{{H}_{2}}O\]molecules 
  done clear
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• question_answer52) Which of the following forms acidic halides?
  A)
   HF
  done clear
  B)
   HCI
  done clear
  C)
   HBr
  done clear
  D)
   HI
  done clear
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• question_answer53) The maximum covalency of nitrogen is
  A)
   3                    
  done clear
  B)
   4
  done clear
  C)
   5                    
  done clear
  D)
   6
  done clear
  View Answer play_arrow

• question_answer54) A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with \[\text{N}{{\text{H}}_{\text{3}}}\]an unstable trihalide is formed. In this process, The oxidation state of nitrogen changes from
  A)
  \[\text{0}\,\text{to}\,-3\]
  done clear
  B)
   \[-3\,\text{to}\,0\]
  done clear
  C)
   \[-3\,\text{to}\,+5\]
  done clear
  D)
   \[-3\,\text{to}\,+3\]
  done clear
  View Answer play_arrow

• question_answer55) Which of the following is isoelectronic pair?
  A)
  \[C{{N}^{-}},{{O}_{3}}\]
  done clear
  B)
   \[Cl{{O}_{2}},Br{{F}_{2}}\]
  done clear
  C)
   \[Br{{O}^{-}}_{2},BrF_{2}^{+}\]
  done clear
  D)
   \[lC{{l}_{2}},Cl{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer56) Bond dissociation enthalpy of \[E-H\]\[E=\]element) bonds is given below. Which of the compounds will act as strongest reducing agent?

  Compound	=	\[N{{H}_{3}}\]	\[P{{H}_{3}}\]	\[As{{H}_{3}}\]	\[Sb{{H}_{3}}\]
  \[\,{{\Delta }_{diss{{(E-H)}^{H}}(kJmo{{l}^{-1}})}}\]	=	389	322	297	255

  A)
  \[N{{H}_{3}}\]
  done clear
  B)
  \[P{{H}_{3}}\]
  done clear
  C)
   \[As{{H}_{3}}\]
  done clear
  D)
   \[Sb{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer57) The electronic configuration of a transition element X in \[+\,3\] oxidation state is \[[Ar]3{{d}^{5}}.\] What is its atomic number?
  A)
   24     
  done clear
  B)
   25      
  done clear
  C)
   26     
  done clear
  D)
   27
  done clear
  View Answer play_arrow

• question_answer58) Spin only magnetic moment value of \[C{{r}^{3+}}\]ion is
  A)
   2.87BM
  done clear
  B)
   3.87 BM
  done clear
  C)
   3.47 BM
  done clear
  D)
   3.67 BM
  done clear
  View Answer play_arrow

• question_answer59) There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
  A)
   U     
  done clear
  B)
   Np    
  done clear
  C)
  Tm    
  done clear
  D)
   Fm
  done clear
  View Answer play_arrow

• question_answer60) When \[\text{0}\text{.1}\,\text{mol}\,\text{CoC}{{\text{l}}_{\text{3}}}{{\text{(N}{{\text{H}}_{\text{3}}}\text{)}}_{\text{5}}}\] is treated with excess of \[\text{AgN}{{\text{O}}_{\text{3}}}\text{,0}\text{.2}\,\text{mole}\]of\[\text{AgCl}\] are obtained. The conductivity of solution will correspond to
  A)
   1:3 electrolyte,        
  done clear
  B)
   1:2 electrolyte
  done clear
  C)
   1:1 electrolyte         
  done clear
  D)
   3:1 electrolyte
  done clear
  View Answer play_arrow

• question_answer61) The correct IUPAC name of \[[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\] is
  A)
   diammine dichlorido platinum (II)
  done clear
  B)
   diammine dichlorido platinum (IV)
  done clear
  C)
   diammine dichlorido platinum (0)
  done clear
  D)
   dichlorido, diammine platinum (IV)
  done clear
  View Answer play_arrow

• question_answer62) Which of the following is a network solid?
  A)
  \[S{{O}_{2}}\](solid)
  done clear
  B)
   \[{{l}_{2}}\]
  done clear
  C)
   Diamond            
  done clear
  D)
   \[{{H}_{2}}O(ice)\]
  done clear
  View Answer play_arrow

• question_answer63) Which kind of defects are introduced by doping?
  A)
   Dislocation defects   
  done clear
  B)
   Schottky defects
  done clear
  C)
   Electronic defects    
  done clear
  D)
   Frenkel defects
  done clear
  View Answer play_arrow

• question_answer64) The unit of ebullioscopic constant is
  A)
   K or K\[{{(molality)}^{-1}}\]
  done clear
  B)
  \[mol\,kg\,{{K}^{-1}}\]or \[{{K}^{-1}}(molality)\]
  done clear
  C)
   \[kg\,mo{{l}^{-1}}{{K}^{-1}}\]or \[{{K}^{-1}}{{(molality)}^{-1}}\]
  done clear
  D)
   \[Kmol\,k{{g}^{-1}}\]or \[K(molality)\]
  done clear
  View Answer play_arrow

• question_answer65) A beaker contains a solution of substance A. On dissolving substance A in small amount in  this solution, precipitation of substance A takes place. The solution is
  A)
   concentrated         
  done clear
  B)
   saturated
  done clear
  C)
   unsaturated          
  done clear
  D)
   super saturated
  done clear
  View Answer play_arrow

• question_answer66) 4L of 0.02 M aqueous solution of NaCI was diluted by adding 1 L of water. The molality of  the resultant solution is
  A)
   0.004 
  done clear
  B)
   0.008
  done clear
  C)
   0.012                 
  done clear
  D)
   0.016
  done clear
  View Answer play_arrow

• question_answer67) At high concentration of soap in water, soap behave as
  A)
   molecular solid
  done clear
  B)
   associated colloid
  done clear
  C)
   macromolecular colloid
  done clear
  D)
   lyophilic colloid
  done clear
  View Answer play_arrow

• question_answer68) Physical adsorption of a gaseous species may change to chemical adsorption with
  A)
   decrease in temperature
  done clear
  B)
   increase in temperature
  done clear
  C)
   increase in surface area of adsorbent
  done clear
  D)
   decrease in surface area of adsorbent
  done clear
  View Answer play_arrow

• question_answer69) Consider the reaction \[A\xrightarrow{{}}B;\]the concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer70) Activation energy of a chemical reaction can be determined by
  A)
   determining the rate constants at standard temperature
  done clear
  B)
   determining  the  rate  constants  at two temperatures
  done clear
  C)
   determining probability of collision
  done clear
  D)
   using catalyst
  done clear
  View Answer play_arrow

• question_answer71) In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \[\text{C}{{\text{u}}_{\text{2}}}\text{O}\]with
  A)
   \[FeS\]
  done clear
  B)
   \[CO\]
  done clear
  C)
   \[C{{u}_{2}}S\]
  done clear
  D)
   \[S{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer72) Which of the following is not a target molecule for drug function in body?
  A)
   Vitamins             
  done clear
  B)
   Proteins    
  done clear
  C)
   Lipids                
  done clear
  D)
   Carbohydrates
  done clear
  View Answer play_arrow

• question_answer73) Which of the following statements is not true about low density polythene?
  A)
   Tough
  done clear
  B)
   Highly branched structure
  done clear
  C)
   Poor conductor of electricity
  done clear
  D)
   Hard
  done clear
  View Answer play_arrow

• question_answer74) Biotin is an organic compound present in yeast. Its deficiency in diet causes dermatitis and paralysis. It is also known as
  A)
   vitamin\[{{B}_{1}}\]            
  done clear
  B)
   vitamin\[{{B}_{12}}\]
  done clear
  C)
   vitamin D            
  done clear
  D)
   vitamin H
  done clear
  View Answer play_arrow

• question_answer75) Methyl \[\alpha -D-\]glucoside and methyl \[\beta -D-\] glucoside are
  A)
   epimers                   
  done clear
  B)
   anomers
  done clear
  C)
   conformational diastereomers
  done clear
  D)
   enantiomers
  done clear
  View Answer play_arrow

• question_answer76) The number ofdisulphide linkages present in insulin are
  A)
   1        
  done clear
  B)
   2         
  done clear
  C)
   3        
  done clear
  D)
   4
  done clear
  View Answer play_arrow

• question_answer77) The source of nitrogen in Gabriel synthesis of amines is
  A)
   sodium azide \[Na{{N}_{3}}\]
  done clear
  B)
   potassium phthalimide\[{{C}_{6}}{{H}_{4}}{{(CO)}_{2}}\bar{N}{{K}^{+}}\]
  done clear
  C)
   sodium cyanide
  done clear
  D)
   potassium nitrate
  done clear
  View Answer play_arrow

• question_answer78) Which is the most suitable reagent for the following conversion? \[C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\xrightarrow{{}}\] \[C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH\]
  A)
   \[Zn-Hg+HCl\]
  done clear
  B)
   \[{{l}_{2}}+NaOH\]
  done clear
  C)
   Fehlings reagent    
  done clear
  D)
   \[Sn+NaOH\]solution
  done clear
  View Answer play_arrow

• question_answer79) \[C{{H}_{3}}-C=CH\xrightarrow[1%\,HgS{{O}_{4}}]{40%\,{{H}_{2}}S{{O}_{4}}}A\xrightarrow{\text{Isomerisation}}\] \[C{{H}_{3}}COC{{H}_{3}}\] Structure of A and the type of isomerism in the above reaction are respectively.
  A)
   prop-l-en-2-ol, metamerism
  done clear
  B)
   prop-1-en-l-ol, tautomerism
  done clear
  C)
   prop-2-en-2-ol, cis and trans isomerism
  done clear
  D)
   prop-2-en-1-ol, tautomerism
  done clear
  View Answer play_arrow

• question_answer80) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is
  A)
   ethene              
  done clear
  B)
   propene
  done clear
  C)
   but-1-ene           
  done clear
  D)
   but-2-ene
  done clear
  View Answer play_arrow

• question_answer81) Which of the following species can act as the strongest base?
  A)
  \[O{{H}^{-}}\]
  done clear
  B)
   \[O{{R}^{-}}\]
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer82) IUPAC name of m-cresol is
  A)
   benzene-1, 3-diol     
  done clear
  B)
   3-chlorophenol
  done clear
  C)
   3-methyl phenol      
  done clear
  D)
   3-methoxyphenol
  done clear
  View Answer play_arrow

• question_answer83) The order of reactivity of following alcohols with halogen acids is

  (i)\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]

  (ii) \[C{{H}_{3}}C{{H}_{2}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]

  (iii) \[C{{H}_{3}}C{{H}_{2}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-OH\]

  A)
   II > I > III
  done clear
  B)
   I > III > II
  done clear
  C)
   lll > ll > l         
  done clear
  D)
   l > ll > lll
  done clear
  View Answer play_arrow

• question_answer84) The position of \[-Br\]in the compound in \[C{{H}_{3}}CH=CHC(Br){{(C{{H}_{3}})}_{2}}\]can be classified as
  A)
   vinyl                 
  done clear
  B)
   secondary
  done clear
  C)
   allyl                 
  done clear
  D)
   aryl
  done clear
  View Answer play_arrow

• question_answer85) Benzene does not undergo addition reactions easily because
  A)
   it has a cyclic structure
  done clear
  B)
   it has 6H-atoms
  done clear
  C)
   double bonds in it are very strong
  done clear
  D)
   resonance stabilized system is to be preserved
  done clear
  View Answer play_arrow

• question_answer86) Alkynes occur in nature in
  A)
   free state             
  done clear
  B)
   partially free state
  done clear
  C)
   not in free state       
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer87) Which of the following reagents converts both acetaldehyde and acetone to alkanes?
  A)
  \[Ni/{{H}_{2}}\]
  done clear
  B)
   \[LiAl{{H}_{4}}\]
  done clear
  C)
   \[{{l}_{2}}/NaOH\]
  done clear
  D)
   \[Zn-Hg/HCl\]
  done clear
  View Answer play_arrow

• question_answer88) \[{{C}_{6}}{{H}_{6}}+C{{l}_{2}}(excess)\frac{Anhy.AlC{{l}_{3}}}{dark,cold}P\] Product, P is
  A)
  \[{{C}_{6}}{{H}_{5}}Cl\]
  done clear
  B)
   \[{{C}_{6}}{{H}_{4}}C{{l}_{2}}\]
  done clear
  C)
   \[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\]
  done clear
  D)
   \[{{C}_{6}}C{{l}_{6}}\]
  done clear
  View Answer play_arrow

• question_answer89) An alkene A contains three \[C-C,\]eight \[C-H-\sigma -\]bonds and one \[C-C-\pi -\]bond. A on ozonolysis gives two moles of an aldehyde of molar mass 44 u. IUPAC name of A is
  A)
   but-1-ene            
  done clear
  B)
   but-2-ene
  done clear
  C)
   2-methylpropane     
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer90) Among the following which one can have a meso-form?
  A)
  \[C{{H}_{3}}CH(OH)CH(Cl){{C}_{2}}{{H}_{5}}\]
  done clear
  B)
   \[C{{H}_{3}}CH(OH)CH(OH)C{{H}_{3}}\]
  done clear
  C)
   \[{{C}_{2}}{{H}_{5}}CH(OH)CH(OH)C{{H}_{3}}\]
  done clear
  D)
   \[HOC{{H}_{2}}CH(Cl)C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer91) Calculate pH of \[1\,M\,NaHC{{O}_{3}}.\]Given \[{{H}_{2}}C{{O}_{3}}+{{H}_{2}}OHCO_{3}^{-}+{{H}_{3}}{{O}^{+}};p{{K}_{1}}=6.38\]\[HCO_{3}^{-}+{{H}_{2}}OCO_{3}^{2-}+{{H}_{3}}{{O}^{+}};\,\,\,\,p{{K}_{2}}=10.26\]
  A)
   8.73                
  done clear
  B)
   8.32,
  done clear
  C)
   6.73              
  done clear
  D)
   6.32
  done clear
  View Answer play_arrow

• question_answer92) Elements Se, Cl and S have been arranged in the order of increasing ionisation energies. Identify the correct order.
  A)
   \[S<Se<Cl\]
  done clear
  B)
   \[Se<S<Cl\]
  done clear
  C)
   \[Cl<S<Se\]
  done clear
  D)
   \[Se=S<Cl\]
  done clear
  View Answer play_arrow

• question_answer93) Which of the following is correct for number of electrons, number of orbitals and type of  orbitals respectively in N-orbit?
  A)
   4, 4 and 8
  done clear
  B)
   4, 8 and 16
  done clear
  C)
  32,16 and 4
  done clear
  D)
   4,16 and 32
  done clear
  View Answer play_arrow

• question_answer94) The de-Broglie wavelength of helium atom at room temperature is
  A)
   \[6.6\times {{10}^{-34}}m\]
  done clear
  B)
   \[4.39\times {{10}^{-10}}m\]
  done clear
  C)
   \[7.34\times {{10}^{-11}}m\]
  done clear
  D)
   \[2.335\times {{10}^{-20}}\,m\]
  done clear
  View Answer play_arrow

• question_answer95) In which of the following pairs of molecules/ions, the central atoms have \[s{{p}^{2}}\]hydridisation?
  A)
   \[B{{F}_{3}}\]and\[NH_{2}^{-}\]       
  done clear
  B)
  \[NO_{2}^{-}\]and \[N{{H}_{3}}\]
  done clear
  C)
  \[B{{F}_{3}}\] and\[NO_{2}^{-}\]      
  done clear
  D)
   \[NH_{2}^{-}\]and \[{{H}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer96) If a gas expands at constant temperature, it indicates that                    
  A)
   kinetic energy of molecules decreases
  done clear
  B)
   pressure of the gas increases
  done clear
  C)
   kinetic energy of molecules remains same
  done clear
  D)
   number of the molecules of gas increases
  done clear
  View Answer play_arrow

• question_answer97) For the reaction, \[{{C}_{3}}{{H}_{8}}(g)+5{{O}_{2}}(g)\xrightarrow{{}}3C{{O}_{2}}(g)+4{{H}_{2}}O(l)\] at constant temperature, \[\Delta H-\Delta E\] is
  A)
   \[+\,3RT\]
  done clear
  B)
   \[-RT\]
  done clear
  C)
   \[+\,RT\]
  done clear
  D)
   \[-3RT\]
  done clear
  View Answer play_arrow

• question_answer98) In which of the following equilibrium \[{{K}_{c}}\]and \[{{K}_{p}}\]are not equal?
  A)
   \[2C(s)+{{O}_{2}}(g)2C{{O}_{2}}(g)\]
  done clear
  B)
   \[2NO(g){{N}_{2}}(g)+{{O}_{2}}(g)\]
  done clear
  C)
   \[S{{O}_{2}}(g)+N{{O}_{2}}(g)S{{O}_{3}}(g)+NO(g)\]
  done clear
  D)
   \[{{H}_{2}}(g)+{{l}_{2}}(g)2Hl(g)\]
  done clear
  View Answer play_arrow

• question_answer99) On   adding   0.1M   solution   each   of \[[A{{g}^{+}}],[B{{a}^{2+}}],(C{{a}^{2+}}]\] in\[N{{a}_{2}}S{{O}_{4}}\] solution, species first precipitated is \[[{{K}_{sp}}BaS{{O}_{4}}={{10}^{-11}},{{K}_{sp}}CaS{{O}_{4}}={{10}^{-6}}\]\[and\,{{K}_{sp}}A{{g}_{2}}S{{O}_{4}}={{10}^{-5}}]\]
  A)
  \[A{{g}_{2}}S{{O}_{4}}\]           
  done clear
  B)
  \[BaS{{O}_{4}}\]
  done clear
  C)
  \[CaS{{O}_{4}}\]            
  done clear
  D)
   All of these
  done clear
  View Answer play_arrow

• question_answer100) Heat of neutralisation of HF (a weak acid) with strong base is \[-\text{ }16.4\text{ }kcal.\] Calculate heat of ionisation of HF in water.
  A)
  \[-13.7\text{ }kcal\]
  done clear
  B)
  \[-2.7\text{ }kcal\]
  done clear
  C)
   \[+30.1\text{ }kcal\]
  done clear
  D)
  \[+\text{ }3.01\text{ }kcal\]
  done clear
  View Answer play_arrow

• question_answer101) What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
  A)
   16     
  done clear
  B)
   24     
  done clear
  C)
   32     
  done clear
  D)
   8
  done clear
  View Answer play_arrow

• question_answer102) Golden rice is a promising transgenic crop. When released for cultivation, it will help in
  A)
   alleviation of vitamin- A deficiency
  done clear
  B)
   pest resistance
  done clear
  C)
   herbicide tolerance
  done clear
  D)
   producing a petrol-like fuel from rice
  done clear
  View Answer play_arrow

• question_answer103) How does pruning help in making the hedge dense?
  A)
   It induces the differentiation of new shoots from the roots lock
  done clear
  B)
   It frees axillary buds from apical dominance
  done clear
  C)
   The apical shoot grows faster after pruning
  done clear
  D)
   It releases wound hormones
  done clear
  View Answer play_arrow

• question_answer104) Praying mentis is a good example of
  A)
   Mullerian mimicry    
  done clear
  B)
   warning colouration
  done clear
  C)
   social insects        
  done clear
  D)
   camouflage
  done clear
  View Answer play_arrow

• question_answer105) Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
  A)
   Thiamine
  done clear
  B)
   Folic acid and cobalamine
  done clear
  C)
   Riboflavin
  done clear
  D)
   Iron compounds
  done clear
  View Answer play_arrow

• question_answer106) In which of the following fruits is the edible part the aril?
  A)
   Custard apple       
  done clear
  B)
   Pomegranate
  done clear
  C)
   Orange             
  done clear
  D)
   Litchi
  done clear
  View Answer play_arrow

• question_answer107) Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year
  A)
   1986            
  done clear
  B)
   1987
  done clear
  C)
   1988               
  done clear
  D)
   1985
  done clear
  View Answer play_arrow

• question_answer108) Which one of the following is not used for construction of ecological pyramids?
  A)
   Dry weight
  done clear
  B)
   Number of individuals
  done clear
  C)
   Rate of energy flow
  done clear
  D)
   Fresh weight
  done clear
  View Answer play_arrow

• question_answer109) Niche overlap indicates
  A)
   active co-operation between two species
  done clear
  B)
   two different parasites on the same host
  done clear
  C)
   sharing of one or more resources between the two species
  done clear
  D)
   mutualism between two species
  done clear
  View Answer play_arrow

• question_answer110) Treatment of seed at low temperature under moist conditions to break its dormancy is called
  A)
   scarification  
  done clear
  B)
   vernalisation
  done clear
  C)
   chelation             
  done clear
  D)
   stratification
  done clear
  View Answer play_arrow

• question_answer111) Which one of the following is not included under in situ conservation?
  A)
   Sanctuary           
  done clear
  B)
   Botanical garden
  done clear
  C)
   Biosphere reserve    
  done clear
  D)
   National park
  done clear
  View Answer play_arrow

• question_answer112) Phenotype of an organism is the result of
  A)
   mutations and linkages
  done clear
  B)
   cytoplasmic effects and nutrition
  done clear
  C)
   environmental changes and sexual dimorphism
  done clear
  D)
   genotype and environment interactions
  done clear
  View Answer play_arrow

• question_answer113) Moss peat is used as a packing material for sending flowers and live plants to distant places because
  A)
   it is easily available
  done clear
  B)
   it is hygroscopic
  done clear
  C)
   it reduces transpiration
  done clear
  D)
   it serves as a disinfectant
  done clear
  View Answer play_arrow

• question_answer114) A common structural feature of vessel elements and sieve tube elements is
  A)
   thick secondary walls
  done clear
  B)
   pores on lateral walls
  done clear
  C)
   presence of P-protein
  done clear
  D)
   enucleate condition
  done clear
  View Answer play_arrow

• question_answer115) In which mode of inheritance do you expect more maternal influence among the offspring?
  A)
   Autosomal
  done clear
  B)
   Cytoplasmic
  done clear
  C)
   Y-linked
  done clear
  D)
   X-linked
  done clear
  View Answer play_arrow

• question_answer116) Conifers differ from grasses in the
  A)
   production of seeds from ovules
  done clear
  B)
   lack of xylem tracheids
  done clear
  C)
   absence of pollen tubes
  done clear
  D)
   formation of endosperm before fertilization
  done clear
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• question_answer117) In maize, hybrid vigour is exploited by
  A)
   bombarding the protoplast with DNA
  done clear
  B)
   crossing of two inbreed parental lines
  done clear
  C)
   harvesting seeds from the most productive plants
  done clear
  D)
   inducing mutations
  done clear
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• question_answer118) Amino acid sequence, in protein synthesis is decided by the sequence of
  A)
  \[tRNA\]
  done clear
  B)
   \[mRNA\]
  done clear
  C)
   \[cDNA\]
  done clear
  D)
   \[rRNA\]
  done clear
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• question_answer119) How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to \[C{{O}_{2}}\]and \[{{H}_{2}}O\]yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
  A)
   Two                 
  done clear
  B)
   Thirty
  done clear
  C)
   Fifty seven           
  done clear
  D)
   One
  done clear
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• question_answer120) Which one of the following is the correctly matched pair of an endangered animal and a National Park?
  A)
   Lion - Corbett National Park
  done clear
  B)
   Rhinoceros - Kaziranga National Park
  done clear
  C)
   Wild ass - Dudhwa National Park
  done clear
  D)
   Great Indian - Keoladeo National Park bustard
  done clear
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• question_answer121) A person showing unpredictable moods, out bursts of emotion, quarrel some behaviour and conflicts with others is suffering from
  A)
   schizophrenia
  done clear
  B)
   Borderline Personality Disorder (BPD)
  done clear
  C)
   mood disorders
  done clear
  D)
   addictive disorders
  done clear
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• question_answer122) Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa and fruit a capsule or berry are characteristic features of
  A)
   Asteraceae          
  done clear
  B)
   Brassicaceae
  done clear
  C)
   Solanaceae          
  done clear
  D)
   Liliaceae
  done clear
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• question_answer123) People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude
  A)
   people get pollution-free air to breathe and more oxygen is available
  done clear
  B)
   atmospheric\[{{\text{O}}_{\text{2}}}\] level is less and hence more RBCs are needed to absorb the required amount of \[{{\text{O}}_{\text{2}}}\]to survive
  done clear
  C)
   there is more UV radiation which enhances RBC production
  done clear
  D)
   people eat more nutritive food, therefore more RBCs are formed
  done clear
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• question_answer124) An important evidence in favour of organic evolution is the occurrence of
  A)
   homologous and vestigial organs
  done clear
  B)
   analogous and vestigial organs
  done clear
  C)
   homologous organs only
  done clear
  D)
   homologous and analogous organs
  done clear
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• question_answer125) Which one of the following is not a living fossil?
  A)
   King crab
  done clear
  B)
   Sphenodon
  done clear
  C)
   Archaeopteryx
  done clear
  D)
   Peripatus
  done clear
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• question_answer126) Which one of the following is a matching set of a phylum and its three examples?
  A)
   Cnidaria - Bonellia, Physalia, Aurelia
  done clear
  B)
   Platyhelminthes - Planaria/Schistosoma, Enterobius
  done clear
  C)
   Mollusca - Loligo, Teredo, Octopus
  done clear
  D)
   Porifera - Spongilla, Euplectella, Pennatula
  done clear
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• question_answer127) Which of the following pairs of an animal and a plant represents endangered organisms in India?
  A)
   Bentinckia - Red panda nicobarica
  done clear
  B)
   Tamarind          -   Rhesus monkey
  done clear
  C)
   Cinchona           - Leopard
  done clear
  D)
   Banyan             - Black buck
  done clear
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• question_answer128) Jurassic period of the Mesozoic era is characterised by
  A)
   gymnosperms are dominant plants and first birds appear
  done clear
  B)
   radiation of reptiles and origin of mammal like reptiles
  done clear
  C)
   dinosaurs become extinct and angiosperms appear
  done clear
  D)
   flowering plants and first dinosaurs appear
  done clear
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• question_answer129) Which of the following statements regarding cilia is not correct?
  A)
   The organised beating of cilia is controlled by fluxes of \[C{{a}^{2+}}\]across the membrane
  done clear
  B)
   Cilia are hair-like cellular appendages
  done clear
  C)
   Microtubules of cilia are composed of tubulin
  done clear
  D)
   Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules
  done clear
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• question_answer130) Microbes found to be very useful in genetic engineering are
  A)
   Escherichia coli and Agrobacterium tumefaciens
  done clear
  B)
   Vibrio cholerae and a tailed bacteriophage
  done clear
  C)
   Diplococcus sp. and Pseudomonas sp
  done clear
  D)
   Crown gall bacterium and Caenorhabditi selegans
  done clear
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• question_answer131) Which of the following environmental conditions are essential for optimum growth of Mucoron a piece of bread?

  (i) Temperature of about \[25{{\,}^{o}}C\]

  (ii) Temperature of about \[5{{\,}^{o}}C\]

  (iii) Relative humidity of about 5%

  (iv) Relative humidity of about 95%Vvi

  (v) A shady place

  (vi) A brightly illuminated place

  Choose the answer from the following options
  A)
   I, III and V             
  done clear
  B)
   I, IV and V
  done clear
  C)
   II, IV and V            
  done clear
  D)
   II, III and VI
  done clear
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• question_answer132) During   photorespiration,   the   oxygen consuming reaction(s) occur in
  A)
   stroma of chloroplasts and mitochondria
  done clear
  B)
   stroma of chloroplasts and peroxisomes
  done clear
  C)
   grana of chloroplasts and peroxisomes
  done clear
  D)
   stroma of chloroplasts
  done clear
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• question_answer133) Sertoli cells are regulated by the pituitary hormone known as
  A)
   FSH
  done clear
  B)
   GH
  done clear
  C)
   Prolactin
  done clear
  D)
   LH
  done clear
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• question_answer134) The contractile protein of skeletal muscle involving ATPase activity is
  A)
   tropomyosin         
  done clear
  B)
   myosin
  done clear
  C)
   \[\alpha -\]actin              
  done clear
  D)
   troponin
  done clear
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• question_answer135) One gene-one enzyme hypothesis was postulated by
  A)
   R Franklin
  done clear
  B)
   Hershey and Chase
  done clear
  C)
   A Garrod
  done clear
  D)
   Beadle and Tatum
  done clear
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• question_answer136) Test cross involves
  A)
   crossing between two genotypes with recessive trait
  done clear
  B)
   crossing between two F, hybrids
  done clear
  C)
   crossing the \[{{F}_{1}}\]hybrid with a double recessive genotype
  done clear
  D)
   crossing between two genotypes with dominant trait
  done clear
  View Answer play_arrow

• question_answer137) Areolar connective tissue joins
  A)
   fat body with muscles
  done clear
  B)
   integument with muscles
  done clear
  C)
   bones with muscles
  done clear
  D)
   bones with bones
  done clear
  View Answer play_arrow

• question_answer138) Cri-du-chat syndrome in humans is caused by the
  A)
   fertilisation of an XX egg by a normal Y- bearing sperm
  done clear
  B)
   loss of half of the short arm of chromosome 5
  done clear
  C)
   loss of half of the long arm of chromosome 5
  done clear
  D)
   trisomy of 21 st chromosome
  done clear
  View Answer play_arrow

• question_answer139) Restriction endonuclease
  A)
   cuts the DNA molecule randomly
  done clear
  B)
   cuts the DNA molecule at specific sites
  done clear
  C)
   restricts the synthesis of DNA inside the nucleus
  done clear
  D)
   synthesises DNA     
  done clear
  View Answer play_arrow

• question_answer140) Which of the following is an accumulation and release centre of neurohormones?
  A)
   Posterior pituitary lobe
  done clear
  B)
   Intermediate lobe of the pituitary
  done clear
  C)
   Hypothalamus
  done clear
  D)
   Anterior pituitary lobe
  done clear
  View Answer play_arrow

• question_answer141) Which one of the following has an open circulatory system?
  A)
   Pheretima            
  done clear
  B)
   Periplaneta
  done clear
  C)
   Hirudinaria           
  done clear
  D)
   Octopus
  done clear
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• question_answer142) Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?
  A)
   ACTH              
  done clear
  B)
   Insulin
  done clear
  C)
   Adrenaline          
  done clear
  D)
   Glucagon
  done clear
  View Answer play_arrow

• question_answer143) The causative agent of mad-cow disease is a
  A)
   bacterium           
  done clear
  B)
   prion
  done clear
  C)
   worm                
  done clear
  D)
   virus
  done clear
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• question_answer144) Biradial symmetry and lack of cnidoblasts are the characteristics of
  A)
   Starfish and sea anemone
  done clear
  B)
   Ctenoplana and Beroe
  done clear
  C)
   Aurlia and Paramecium
  done clear
  D)
   Hydra and starfish
  done clear
  View Answer play_arrow

• question_answer145) The arrangement of the nuclei in a normal embryo sac in the dicot plants is
  A)
  \[~2+4+2\]            
  done clear
  B)
   \[3+2+3\]
  done clear
  C)
  \[2+3+3\]            
  done clear
  D)
   \[3+3+2\]
  done clear
  View Answer play_arrow

• question_answer146) Triticale, the first man-made cereal crop, has been obtained by crossing wheat with
  A)
   rye
  done clear
  B)
   pearl millet
  done clear
  C)
   sugar cane
  done clear
  D)
   barley            
  done clear
  View Answer play_arrow

• question_answer147) HIV that causes AIDS, first starts destroying
  A)
   B-lymphocytes      
  done clear
  B)
   leucocytes
  done clear
  C)
   thrombocytes       
  done clear
  D)
   helper T-lymphocytes
  done clear
  View Answer play_arrow

• question_answer148) In which one of the following sets of animals do all the four give birth to young ones?
  A)
   Lion, bat, whale, ostrich
  done clear
  B)
   Platypus, penguin, bat, hippopotamus
  done clear
  C)
   Shrew, bat, cat, kiwi
  done clear
  D)
   Kangaroo, hedgehog, dolphin, loris
  done clear
  View Answer play_arrow

• question_answer149) Two common characters found in centipede,  cockroach and crab are
  A)
   compound eyes and anal cerci
  done clear
  B)
   jointed legs and chitinous exoskeleton
  done clear
  C)
   green gland and trachea                      
  done clear
  D)
   book lungs and antennae
  done clear
  View Answer play_arrow

• question_answer150) Angiotensinogen is a protein produced and secreted by
  A)
   macula densa cells
  done clear
  B)
   endothelial cells (cells lining the blood vessels)
  done clear
  C)
   liver cells
  done clear
  D)
   juxtaglomerular (JG) cells
  done clear
  View Answer play_arrow