Solved papers for JCECE Medical JCECE Medical Solved Paper-2010

done JCECE Medical Solved Paper-2010

  • question_answer1) At what angle must the two forces \[(x+y)\] and \[(x-y)\]act so that the resultant may be\[\sqrt{({{x}^{2}}+{{y}^{2}})}\]

    A) \[{{\cos }^{-1}}\left[ -\frac{{{x}^{2}}+{{y}^{2}}}{2({{x}^{2}}-{{y}^{2}})} \right]\]

    B) d\[{{\cos }^{-1}}\left[ \frac{-2({{x}^{2}}-{{y}^{2}})}{{{x}^{2}}+{{y}^{2}}} \right]\]

    C) \[{{\cos }^{-1}}\left[ -\frac{({{x}^{2}}+{{y}^{2}})}{({{x}^{2}}-{{y}^{2}})} \right]\]

    D) \[{{\cos }^{-1}}\left[ -\frac{({{x}^{2}}-{{y}^{2}})}{({{x}^{2}}+{{y}^{2}})} \right]\]

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  • question_answer2) A body starts from rest with uniform acceleration. If its velocity after \[n\] second is \[v,\] then its displacement in the last 2 s is

    A) \[\frac{2v(n+1)}{n}\]

    B) \[\frac{v(n+1)}{n}\]

    C) \[\frac{v(n-1)}{n}\]

    D) \[\frac{2v(n-1)}{n}\]

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  • question_answer3) A wheel completes 2000 revolutions to cover the 9.5 km distance, then the diameter of the wheel is

    A) 1.5m

    B) 1.5cm

    C) 7.5 cm

    D) 7.5m

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  • question_answer4) A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

    A) same everywhere

    B) lower in front side

    C) lower in rear side

    D) lower in upper side

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  • question_answer5) A block A weighing 100 kg rests on a block B and is tied with a horizontal string to the wall at C. Block B weighs 200kg. The coefficient of friction between A and B is 0.25 and between B and the surface is \[\frac{1}{3}.\] The horizontal force P necessary to move the block B should be \[(g=10m/{{s}^{2}})\]

    A) 1150 N

    B) 1250 N

    C) 1300 N

    D) 1420 N

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  • question_answer6) A boy and a man carry a uniform rod of length \[L,\]horizontally in such a way that boy gets\[\frac{\text{1}}{\text{4}}\text{th}\] load. If the boy is at one end of the rod, the distance of the man from the other end is

    A) \[\frac{L}{3}\]

    B) \[\frac{L}{4}\]

    C) \[\frac{2L}{3}\]

    D) \[\frac{3L}{4}\]

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  • question_answer7) Two capillary of lengths L and 2L and of radii R and 2R are connected in series. The net rate of flow of fluid through them will be (given rate of the flow through single capillary,\[X=\frac{\pi p{{R}^{4}}}{8\eta L}\])

    A) \[\frac{8}{9}X\]

    B) \[\frac{9}{8}X\]

    C) \[\frac{5}{7}X\]

    D) \[\frac{7}{5}X\]

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  • question_answer8) The molecules of a given mass of a gas have a rms velocity of 200 m/s at \[27{{\,}^{o}}C\]and \[\text{1}\text{.0 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{5}}}\,\text{N/}{{\text{m}}^{\text{2}}}\]pressure. When the temperature is\[\text{127}{{\,}^{o}}\text{C}\] and pressure is \[0.5\times {{10}^{5}}N/{{m}^{2}},\] the rms velocity in m/s will be

    A) \[\frac{100\sqrt{2}}{3}\]

    B) \[100\sqrt{2}\]

    C) \[\frac{400}{\sqrt{3}}\]

    D) None of these

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  • question_answer9) 3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of\[{{30}^{o}}\] with direction of the field. It experiences a force of magnitude

    A) \[3\times {{10}^{4}}N\]

    B) \[3\times {{10}^{2}}N\]

    C) \[3\times {{10}^{-2}}N\]

    D) \[3\times {{10}^{-4}}N\]

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  • question_answer10) A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 T to 0.35 T in 2 millisecond. The average induced emf in the coil is

    A) 1.77 V

    B) 17.7 V

    C) 177 V

    D) 0.177 V

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  • question_answer11) In the circuit shown in figure neglecting sourte resistance, the voltmeter and ammeter readings will be respectively

    A) \[0V,3A\]

    B) \[150V,3A\]

    C) \[150\,V,6A\]

    D) \[0\,V,8A\]

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  • question_answer12) Photon and electron are given energy \[({{10}^{-2}}\,J).\] Wavelengths associated with photon and electron are\[{{\lambda }_{ph}}\]and\[{{\lambda }_{el}}\]then, correct statement will be

    A) \[{{\lambda }_{ph}}>{{\lambda }_{el}}\]

    B) \[{{\lambda }_{ph}}<{{\lambda }_{el}}\]

    C) \[{{\lambda }_{ph}}={{\lambda }_{el}}\]

    D) \[\frac{{{\lambda }_{el}}}{{{\lambda }_{ph}}}=c\]

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  • question_answer13) The wavelength of radiation emitted is \[{{\lambda }_{0}}\] when an electron jumps from the third to the second orbit of hydrogen atom. For the electron jump from the fourth to-the second orbit of hydrogen atom, the wavelength of radiation emitted will be

    A) \[\frac{16}{25}{{\lambda }_{0}}\]

    B) \[\frac{20}{27}{{\lambda }_{0}}\]

    C) \[\frac{27}{20}{{\lambda }_{0}}\]

    D) \[\frac{25}{16}{{\lambda }_{0}}\]

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  • question_answer14) Radius of \[{{\,}_{\text{2}}}\text{H}{{\text{e}}^{\text{4}}}\]nucleus is 3 fermi. The radius of \[_{\,\text{82}}\text{P}{{\text{b}}^{\text{206}}}\]nucleus will be

    A) 5 fermi

    B) 6 fermi

    C) 11.16 fermi

    D) 8 fermi

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  • question_answer15) The contribution in the total current flowing through a semiconductor due to electrons and holes are\[\frac{3}{4}\]and \[\frac{1}{4}\] respectively. If the drift velocity of electrons is \[\frac{5}{2}\] times that of holes at this temperature, then the ratio of concentration of electrons and holes is

    A) 6:5

    B) 5:6

    C) 3:2

    D) 2:3

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  • question_answer16) The attenuation in optical fibre is mainly due to

    A) absorption

    B) scattering

    C) Neither absorption nor scattering

    D) Both [a] and [b]

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  • question_answer17) An astronomical telescope has an angular magnification of magnitude 5 for distant objects. The separation between the objective and the eye-piece is 36 cm and the final image is formed at infinity. The focal length \[{{f}_{o}}\]of the objective and the focal length \[{{f}_{e}}\] of the eye-piece are:

    A) \[{{f}_{o}}=45\,cm\]and \[{{f}_{e}}=-9cm\]

    B) \[{{f}_{o}}=-7.2\,cm\]and \[{{f}_{e}}=5\,cm\]

    C) \[{{f}_{o}}=50\,cm\]and \[{{f}_{e}}=10\,cm\]

    D) \[{{f}_{o}}=30\,cm\]and \[{{f}_{e}}=6\,cm\]

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  • question_answer18) A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of incident beam. At the first maximum of the diffraction pattern, the phase difference between the rays coming from the edges of the slit is

    A) 0

    B) \[\frac{\pi }{2}\]

    C) \[\pi \]

    D) \[2\pi \]

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  • question_answer19) When the angle of incidence on a material is \[\text{6}{{\text{0}}^{\text{o}}}\text{,}\] the reflected light is completely polarized. The velocity of the refracted ray inside the material is (in \[\text{m}{{\text{s}}^{-1}}\])

    A) \[3\times {{10}^{8}}\]

    B) \[\left[ \frac{3}{\sqrt{2}} \right]\times {{10}^{8}}\]

    C) \[\sqrt{3}\times {{10}^{8}}\]

    D) \[0.5\times {{10}^{8}}\]

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  • question_answer20) Which of the following shows green house effect?

    A) Ultraviolet rays

    B) Infrared rays

    C) X-rays

    D) None of these

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  • question_answer21) In Rutherford scattering experiment, what will be. the correct angle for \[\alpha \] scattering for an impact parameter \[b=0\]

    A) \[{{90}^{o}}\]

    B) \[{{270}^{o}}\]

    C) \[{{0}^{0}}\]

    D) \[{{180}^{0}}.\]

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  • question_answer22) A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using?

    A) Plane mirror

    B) Convex mirror

    C) Coricave.mirror

    D) None of these

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  • question_answer23) If a charged spherical conductor of radius 10 cm has potential V at a point distant 5 cm , from its centre, then the potential at a point distant 15 cm from the centre will be

    A) \[\frac{1}{3}V\]

    B) \[\frac{2}{3}V\]

    C) \[\frac{3}{2}V\]

    D) \[3V\]

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  • question_answer24) The equation of-state of some gases can be expressed as \[\left( p+\frac{a}{{{V}^{2}}} \right)(V-b)=RT\] where, p is the pressure, V the volume, T the absolute temperature and a and b are constants. The dimensional formula of a is

    A) \[[M{{L}^{5}}{{T}^{-2}}]\]

    B) \[[{{M}^{-1}}{{L}^{5}}{{T}^{-2}}]\]

    C) \[[M{{L}^{-1}}{{T}^{-2}}]\]

    D) \[[M{{L}^{-5}}{{T}^{-2}}]\]

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  • question_answer25) A 16 kg block moving on a frictionless horizontal surface with a velocity of 4 m/s compresses an ideal spring and comes to rest. If the force constant of the spring be 100 N/m, then the spring is compressed by

    A) 1.6 m

    B) 4 m

    C) 6.1 m

    D) 3.2 m

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  • question_answer26) A mass of\[\text{6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{24}}}\,\text{kg}\] is to be compressed in a sphere in such a way that the escape velocity from the sphere is \[\text{3}\,\,\text{ }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{8}}}\,\text{m/s}\text{.}\] what should be the radius of the sphere? \[(G=6.67\times {{10}^{-11}}\,N-{{m}^{2}}/k{{g}^{2}})\]

    A) 9 km

    B) 9m

    C) 9 cm

    D) 9 mm

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  • question_answer27) wire of length L and radius r fixed at one end and a force F applied to the other end produces an extension \[l.\]The extension produced in another wire of the same material of length 2L and radius 2r by a force 2F,is

    A) \[l\]

    B) \[2l\]

    C) \[4l\]

    D) \[\frac{l}{2}\]

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  • question_answer28) Two trains are moving towards each other with speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz, the frequency of the whistle heard by a passenger in the second train before the train meets is (the speed of sound in air is 340 m/s)

    A) 600 Hz

    B) 585 Hz

    C) 645 Hz

    D) 666 Hz

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  • question_answer29) Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio

    A) 25 : 1

    B) 5 : 1

    C) 9 : 4

    D) 25 : 16

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  • question_answer30) A microscope is focussed on a3 mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over a mark. How should the microscope be moved to get the mark again in focus?

    A) 1 cm upward

    B) 4.5 cm downward

    C) 1 cm downward

    D) 2 cm upward

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  • question_answer31) A thin lens made of glass of refractive index \[\text{ }\!\!\mu\!\!\text{ }\,\,\text{=}\,\text{1}\text{.5}\]has a focal length equals to 12 cm in air. It is now immersed in water \[\left( \mu =\frac{4}{3} \right).\]Its new focal length is

    A) 48 cm

    B) 36 cm

    C) 24cm

    D) 12 cm

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  • question_answer32) Air is pumped into an automobile tube upto a pressure of 200 kPa in the morning when the air temperature is \[22{{\,}^{o}}C.\] During the day, temperature rises to \[\text{42}{{\,}^{\text{o}}}\text{C}\]and the tube expands by 2%. The pressure of the air in the tube at this temperature, will be approximately

    A) \[212\,kPa\]

    B) \[209\,kPa\]

    C) \[206\,kPa\]

    D) \[200\,kPa\]

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  • question_answer33) A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr respectively. The time in year after which one-fourth of the material remains, is

    A) 4860 yr

    B) 3240 yr

    C) 2340 yr

    D) 1080 yr

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  • question_answer34) A stone dropped from a balloon which is at a height \[h,\]reaches the ground after t second. From the same balloon, if two stones are thrown, one upwards and the other downwards, with the same velocity \[u\]and they reach the ground after \[{{t}_{1}}\]and\[{{t}_{2}}\]second respectively, then

    A) \[t={{t}_{1}}-{{t}_{2}}\]

    B) \[t=\frac{{{t}_{1}}+{{t}_{2}}}{2}\]

    C) \[t=\sqrt{{{t}_{1}}{{t}_{2}}}\]

    D) \[t=\sqrt{t_{1}^{2}-t_{2}^{2}}\]

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  • question_answer35) A shell at rest at the origin explodes into three fragments of masses 1 kg, 2 kg and m kg. The 2 kg and 1 kg pieces fly off with speeds of 12 m/s along \[x-\]axis and 16 m/s along \[y-\]axis respectively. If the m kg piece flies off with a speed of 40 m/s, the total mass of the shell must be

    A) 3.7kg

    B) 4kg

    C) 4.5 kg

    D) 5kg

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  • question_answer36) If a sphere is rolling, then the ratio of its rotational kinetic energy to the total kinetic energy is

    A) 1 :2

    B) 2:5

    C) 2:7

    D) 5:7

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  • question_answer37) A body weighs w newton at the surface of the earth. Its weight at a height equals to half the radius of the earth, will be

    A) \[\frac{w}{2}\]

    B) \[\frac{2w}{3}\]

    C) \[\frac{4w}{9}\]

    D) \[\frac{8w}{27}\]

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  • question_answer38) A part of a long wire carrying a current \[i\] is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

    A) \[\frac{{{\mu }_{0}}i}{4r}\]

    B) \[\frac{{{\mu }_{0}}i}{2r}\]

    C) \[\frac{{{\mu }_{0}}i}{2\pi r}(\pi +1)\]

    D) \[\frac{{{\mu }_{0}}i}{2\pi r}(\pi -1)\]

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  • question_answer39) A \[36\,\Omega \]galvanometer is shunted by resistance of \[4\,\Omega .\] The percentage of the total current, which passes through the galvanometer is

    A) 8%

    B) 9%

    C) 10%

    D) 91%

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  • question_answer40) A can filled with water is revolved in a vertical circle of radius 4 m and the water does not fall down. The time period for a revolution is about

    A) 2s

    B) 4s

    C) 8s

    D) 10 s

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  • question_answer41) The centre of mass of three particles of masses 1 kg, 2 kg and 3 kg is at (3, 3, 3) with reference to a fixed coordinate system. Where should a fourth particle of mass 4 kg be placed, so that the centre of mass of the system of all particles shifts to a point (1, 1, 1)?

    A) \[(-1,-1,-1)\]

    B) \[(-2,-2,-2)\]

    C) \[(2,\,2,\,2)\]

    D) \[(1,\,1,\,1)\]

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  • question_answer42) A pulley fixed to the ceiling carries a string with blocks of masses \[m\] and\[3m\] attached to its ends. The masses of string and pulley are negligible. When the system is released, the acceleration of centre of mass will be

    A) Zero

    B) \[-\frac{g}{4}\]

    C) \[\frac{g}{2}\]

    D) \[-\frac{g}{2}\]

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  • question_answer43) A ray PQ incident on the refracting face BA is refracted in the prism BAC as shown in the figure and emerges from the other refracting face AC as RS, such that \[AQ=AR.\]If the angle of prism \[A={{60}^{o}}\]and the refractive index of the material of prism is \[\sqrt{3},\]then the angle of deviation of the ray is

    A) \[{{60}^{o}}\]

    B) \[{{45}^{o}}\]

    C) \[{{30}^{o}}\]

    D) None of these

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  • question_answer44) To get an output 1 from the circuit shown in the figure, the input must be

    A) \[A=0,B=1,C=0\]

    B) \[A=1,B=0,C=0\]

    C) \[A=1,B=0,C=1\]

    D) \[A=1,B=1,C=0\]

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  • question_answer45) Minimum number of 8|nF and 250 V capacitors are used to make a combination of \[\text{16 }\!\!\mu\!\!\text{ F}\]and 1000 V are

    A) 4

    B) 32

    C) 8

    D) 3

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  • question_answer46) Let eqbe the electric field due to a dipole in its axial plane distan\[l\] and let \[{{\text{E}}_{q}}\]be the field in the equatorial plane distant \[l,\]then the relation between \[{{E}_{a}}\]and \[{{E}_{q}}\]will be

    A) \[{{E}_{a}}=4{{E}_{q}}\]

    B) \[{{E}_{q}}=2{{E}_{a}}\]

    C) \[{{E}_{a}}=2{{E}_{q}}\]

    D) \[{{E}_{q}}=3{{E}_{a}}\]

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  • question_answer47) The current in the given circuit is

    A) 0.3 A

    B) 0.4 A

    C) 0.1 A

    D) 0.2 A

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  • question_answer48) In the circuit shown below what will be the readings of the voltmeter and ammeter? (Total impedance of circuit\[Z=100\,\Omega \])

    A) 200 V, 1 A

    B) 800 V, 2 A

    C) 100 V,2A

    D) 220 V, 2.2 A

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  • question_answer49) A ball of mass 10 kg is moving with a velocity of 10 m/s. It strikes another ball of mass 5 kg, which is moving in the same direction with a velocity of 4 m/s. If the collision is elastic, then their velocities after collision will be respectively

    A) 12 m/s, 6 m/s

    B) 12 m/s, 25 m/s

    C) 6 m/s, 12 m/s

    D) 8 m/s, 20 m/s

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  • question_answer50) A hole is made at the bottom of the tank filled with water (density\[\text{1000}\,\text{kg/}{{\text{m}}^{\text{3}}}\]). If the total pressure at the bottom of the tank is 3 atmosphere (1 atmosphere\[\text{=1}{{\text{0}}^{\text{5}}}\,\text{N/}{{\text{m}}^{\text{2}}}\]), then the velocity of efflux is

    A) \[\sqrt{200}\,m/s\]

    B) \[\sqrt{400}\,m/s\]

    C) \[\sqrt{500}\,m/s\]

    D) \[\sqrt{800}\,m/s\]

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  • question_answer51) The \[\text{As}{{\text{F}}_{\text{5}}}\]molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding are

    A) \[{{d}_{{{x}^{2}}-{{y}^{2}},}}{{d}_{{{z}^{2}}}},s,{{p}_{x}},{{p}_{y}}\]

    B) \[{{d}_{xy,}}s,{{p}_{x}},{{p}_{y}},{{p}_{z}}\]

    C) \[s,{{p}_{x}},{{p}_{y}},{{p}_{x}},{{d}_{{{z}^{2}}}}\]

    D) \[{{d}_{{{x}^{2}}-{{y}^{2}}}},s,{{p}_{x}},{{p}_{y}}\]

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  • question_answer52) The low density of ice compared to water is due to

    A) induced dipole-induced dipole interacdons

    B) dipole-induced dipole interactions

    C) hydrogen bonding interactions

    D) dipole-dipole interactions

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  • question_answer53) Inorganic benzene is

    A) \[{{B}_{3}}{{H}_{3}}{{N}_{3}}\]

    B) \[B{{H}_{3}}N{{H}_{3}}\]

    C) \[{{B}_{3}}{{H}_{6}}{{N}_{3}}\]

    D) \[{{H}_{3}}{{B}_{3}}{{N}_{6}}\]

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  • question_answer54) Which of the following compounds will show metamerism?

    A) \[C{{H}_{3}}-CO-{{C}_{2}}{{H}_{5}}\]

    B) \[{{C}_{2}}{{H}_{5}}-S-{{C}_{2}}{{H}_{5}}\]

    C) \[C{{H}_{3}}-O-C{{H}_{3}}\]

    D) \[C{{H}_{3}}-O-{{C}_{2}}{{H}_{5}}\]

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  • question_answer55) Benzene on treatment with a mixture of cone. \[\text{HN}{{\text{O}}_{\text{3}}}\]and cone. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]at \[\text{100}{{\,}^{o}}\text{C}\]gives

    A) nitrobenzene

    B) m-dinitrobenzene

    C) p-dinitrobenzene

    D) o-dinitrobenzene

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  • question_answer56) 0.765 g of an acid gives 0.535 g of \[\text{C}{{\text{O}}_{\text{2}}}\]and 0.138 g of \[\text{C}{{\text{O}}_{\text{2}}}\]Then, the ratio of the percentage of carbon and hydrogen is

    A) 19:2

    B) 18:11

    C) 20: 17

    D) 1:7

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  • question_answer57) Ziegler-Natta catalyst is

    A) \[{{\text{(P}{{\text{h}}_{3}}\text{0P)}}_{3}}RhCl\]

    B) \[K[PtC{{l}_{3}}({{C}_{2}}{{H}_{4}})]\]

    C) \[[A{{l}_{2}}{{({{C}_{2}}{{H}_{6}})}_{6}}+TiC{{l}_{4}}]\]

    D) \[[Fe{{({{C}_{2}}{{H}_{5}})}_{2}}]\]

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  • question_answer58) 1 L oxygen gas at STP will weigh

    A) 1.43 g

    B) 2.24 g

    C) 11.2 g

    D) 22.4 g

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  • question_answer59) The IUPAC name of the compound, \[{{C}_{2}}{{H}_{5}}-\underset{C{{H}_{2}}}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}OH\]is

    A) 2-ethylprop-2-en-1-ol

    B) 2-hydroxymethylbutan-1-ol

    C) 2-methylenebutan-1-ol

    D) 2-ethyl-3-hydroxyprop-1-ene

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  • question_answer60) The chemical name of vitamin \[{{B}_{1}}\]is

    A) ascorbic acid

    B) riboflavin

    C) pyridoxine

    D) thiamine

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  • question_answer61) Glyptal polymer is obtained from glycol by reacting with

    A) malonic acid

    B) phthalic acid

    C) maleic acid

    D) terephthalic acid

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  • question_answer62) Molecular formula of Glaubers salt is

    A) \[MgS{{O}_{4}}.7{{H}_{2}}O\]

    B) \[CuS{{O}_{4}}.5{{H}_{2}}O\]

    C) \[FeS{{O}_{4}}.7{{H}_{2}}O\]

    D) \[N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O\]

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  • question_answer63) The size of colloidal particles is in between

    A) \[{{10}^{-7}}{{10}^{-9}}cm\]

    B) \[{{10}^{-9}}{{10}^{-11}}cm\]

    C) \[{{10}^{-5}}{{10}^{-7}}cm\]

    D) \[{{10}^{-2}}{{10}^{-3}}cm\]

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  • question_answer64) In the reaction, \[S{{O}_{2}}+2{{H}_{2}}S\xrightarrow{{}}\]\[3S+2{{H}_{2}}O\]the substance oxidised is

    A) \[{{H}_{2}}S\]

    B) \[S{{O}_{2}}\]

    C) \[S\]

    D) \[{{H}_{2}}O\]

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  • question_answer65) The emf of the cell, \[Ni|N{{i}^{2+}}(1.0\,M)||A{{u}^{3+}}(1.0M)|Au\]is \[[{{E}^{o}}(N{{i}^{2+}}/Ni)=-0.25Vand\,{{E}^{o}}\]\[[A{{u}^{3+}}/Au)=+1.5V]\]

    A) 2.00 V

    B) 1.25 V

    C) -1.25 V

    D) 1.75 V

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  • question_answer66) The heat of neutralisation is highest for the reaction between-

    A) \[N{{H}_{4}}OH-C{{H}_{3}}COOH\]

    B) \[HN{{O}_{3}}-N{{H}_{4}}OH\]

    C) \[NaOH-C{{H}_{3}}COOH\]

    D) \[HCl-NaOH\]

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  • question_answer67) An ideal gas expands in volume from \[1\times {{10}^{-3}}{{m}^{3}}\]to \[1\times {{10}^{-2}}{{m}^{3}}\]at 300 K against a constant pressure of \[1\times {{10}^{5}}N{{m}^{-2}}.\]The work done is

    A) \[~-900\,J\]

    B) \[~-\,900\,kJ\]

    C) 270 kJ

    D) 900 Kj

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  • question_answer68) Which one of the following is correct?

    A) \[-\Delta G=\Delta H-T\Delta S\]

    B) \[\Delta H=\Delta G-T\Delta S\]

    C) \[\Delta S=\frac{1}{T}[\Delta G-\Delta H]\]

    D) \[\Delta S=\frac{1}{T}[\Delta H-\Delta G]\]

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  • question_answer69) The electronic configuration of element with atomic number 24 is

    A) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\]

    B) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}\]

    C) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}\]

    D) \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\]

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  • question_answer70) In van der Waals equation of state of the gas law, the constant b is a measure of

    A) intermolecular repulsions

    B) intermolecular attraction

    C) volume occupied by the molecules

    D) intermolecular collisions per unit volum

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  • question_answer71) If the radius of \[{{\text{K}}^{\text{+}}}\]and \[{{F}^{-}}\]are 133 pm and 136 pm respectively, the distance between \[{{\text{K}}^{\text{+}}}\]and \[{{F}^{-}}\]in KF is

    A) 269pm

    B) 134.5pm

    C) 136pm

    D) 3pm

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  • question_answer72) The property of attracting electrons by the halogen atoms in a molecule is called

    A) ionization potential

    B) electron affinity

    C) electronegativity

    D) electronic attraction

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  • question_answer73) A reversible chemical reaction is having two reactants, in equilibrium. If the concentration of the reactants are doubled then the equilibrium constant will

    A) be doubled

    B) become one fourth

    C) be halved

    D) remain the same

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  • question_answer74) The strongest Bronsted base is

    A) \[ClO_{3}^{-}\]

    B) \[ClO_{2}^{-}\]

    C) \[ClO_{4}^{-}\]

    D) \[Cl{{O}^{-}}\]

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  • question_answer75) A solution contains 10 mL 0.1 N NaOH and \[\text{10}\,\text{mL}\,\text{0}\text{.05}\,\text{N}{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\text{,pH}\]of this solution is

    A) less than 7

    B) 7

    C) zero

    D) greater than 7

    View Answer play_arrow
  • question_answer76) For which one of the following reactions \[{{K}_{p}}={{K}_{c}}\]?

    A) \[PC{{l}_{5}}PC{{l}_{3}}+C{{l}_{2}}\]

    B) \[{{N}_{2}}+{{O}_{2}}2NO\]

    C) \[{{N}_{2}}+3{{H}_{2}}2N{{H}_{3}}\]

    D) \[2S{{O}_{3}}2S{{O}_{2}}+{{O}_{2}}\]

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  • question_answer77) What is the molarity of \[\text{0}\text{.2 N N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]solution?

    A) 0.1 M

    B) OM

    C) 0.4 M

    D) 0.2 M

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  • question_answer78) The order of a reaction with rate equal to \[kC_{A}^{3/2}C_{B}^{-1/2}\]is

    A) 1

    B) \[-\frac{1}{2}\]

    C) \[-\frac{3}{2}\]

    D) 2

    View Answer play_arrow
  • question_answer79) A simple method to remove peroxides from ethers is to treat them with an aqueous solution of

    A) KI

    B) KCNS

    C) \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\]

    D) \[B{{r}_{2}}\]

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  • question_answer80) Which of the following is the predominant product in the reaction of \[\text{HOBr}\]with propene?

    A) 2-bromo-l-propanol

    B) 3-bromo-l-propanol

    C) 2-bromo-2-propanol

    D) l-bromo-2-propanol

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  • question_answer81) Most stable carbonium ion is

    A) \[{{\overset{+}{\mathop{\text{C}}}\,}_{2}}{{H}_{5}}\]

    B) \[{{(C{{H}_{3}})}_{3}}\overset{+}{\mathop{C}}\,\]

    C) \[({{C}_{6}}{{H}_{5}})\overset{+}{\mathop{C}}\,\]

    D) \[{{C}_{6}}{{H}_{5}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]

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  • question_answer82) In aqueous solutions, the basic strength of amines decreases in the order

    A) \[C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{2}}N{{H}_{2}}>{{(C{{H}_{3}})}_{3}}N\]

    B) \[{{(C{{H}_{3}})}_{2}}NH>{{(C{{H}_{3}})}_{3}}N>C{{H}_{3}}N{{H}_{2}}\]

    C) \[{{(C{{H}_{3}})}_{3}}N>{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}\]

    D) \[{{(C{{H}_{3}})}_{2}}NH>C{{H}_{3}}N{{H}_{2}}>{{(C{{H}_{3}})}_{3}}N\]

    View Answer play_arrow
  • question_answer83) The most reactive compound towards formation of cyanohydrin on treatment with HCN followed by acidification is

    A) benzaldehyde

    B) p-nitrobenzaldehyde

    C) phenylacetaldehyde

    D) p-hydroxybenzaldehyde

    View Answer play_arrow
  • question_answer84) Producer gas is the mixture of

    A) \[CO+{{N}_{2}}\]

    B) \[CO+{{H}_{2}}\]

    C) \[\text{CO}\,\text{+}\,\text{water}\,\text{vapour}\]

    D) \[{{N}_{2}}+C{{H}_{4}}\]

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  • question_answer85) What is the freezing point of a solution containing \[\text{8}\text{.1 g HBr}\]in 100 g water assuming the acid to be 90% ionised? (\[{{k}_{f}}\]for water\[=1.86\,\text{K}\,\text{mo}{{\text{l}}^{-1}}\])

    A) \[0.85{{\,}^{o}}C\]

    B) \[-3.53{{\,}^{o}}C\]

    C) \[0{{\,}^{o}}C\]

    D) \[-0.35{{\,}^{o}}C\]

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  • question_answer86) Number of elements presents in the fifth period of Periodic Table is

    A) 32

    B) 10

    C) 18

    D) 8

    View Answer play_arrow
  • question_answer87) \[{{[Sc({{H}_{2}}{{O}_{6}})]}^{3+}}\]ion is

    A) colourless and diamagnetic

    B) coloured and octahedral

    C) colourless and paramagnetic

    D) coloured and paramagnetic

    View Answer play_arrow
  • question_answer88) Which one has the highest boiling point?

    A) \[{{H}_{2}}\]

    B) \[Xe\]

    C) \[C{{H}_{4}}\]

    D) \[He\]

    View Answer play_arrow
  • question_answer89) Benzaldehyde reacts with ammonia to form

    A) benzaldehyde ammonia

    B) urotropine

    C) hydrobenzamide

    D) ammonium chloride

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  • question_answer90) Identify Z in the sequence \[C{{H}_{3}}COON{{H}_{4}}\xrightarrow{\Delta }X\xrightarrow[\Delta ]{{{P}_{2}}{{O}_{5}}}Y\xrightarrow{{{H}_{2}}O/{{H}^{+}}}Z\]

    A) \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\]

    B) \[C{{H}_{3}}CN\]

    C) \[C{{H}_{3}}COOH\]

    D) \[{{(C{{H}_{3}}CO)}_{2}}O\]

    View Answer play_arrow
  • question_answer91) Acetic anhydride reacts with diethyl ether in the presence of anhydrous \[\text{AlC}{{\text{l}}_{\text{3}}}\]to give

    A) \[C{{H}_{3}}C{{H}_{2}}COOH\]

    B) \[C{{H}_{3}}C{{H}_{2}}COOC{{H}_{2}}C{{H}_{3}}\]

    C) \[C{{H}_{3}}COOC{{H}_{3}}\]

    D) \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]

    View Answer play_arrow
  • question_answer92) Denaturation of proteins leads to loss of its biological activity by

    A) formation of amino acids

    B) loss of primary structure

    C) loss of both primary and secondary structures

    D) loss of both secondary and tertiary structures

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  • question_answer93) The compound with highest boiling point

    A) \[n-\]hexane

    B) \[n-\]pentane

    C) 2, 2-dimethylpropane

    D) 2-methylbutane

    View Answer play_arrow
  • question_answer94) Which of the following statements concerning transition elements is false?

    A) They are all metals

    B) They easily form complex coordination compounds

    C) Compounds containing their ions are mostly coloured

    D) They show multiple oxidation states always differing by units of two

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  • question_answer95) In the manufacture of bromine from sea water, the mother liquor containing bromide is treated with

    A) carbon dioxide

    B) chlorine

    C) iodine

    D) sulphur dioxide

    View Answer play_arrow
  • question_answer96) A transition element X has the configuration \[[Ar]{{d}^{4}}\]in its\[+\,3\]oxidation state. Its atomic number is

    A) 25

    B) 26

    C) 22

    D) 19

    View Answer play_arrow
  • question_answer97) The element with the electronic configuration as \[[Ar]\,3{{d}^{10}}4{{s}^{2}}4{{p}^{3}}\] represents a

    A) metal

    B) non-metal

    C) metalloid

    D) transition element

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  • question_answer98) The number of moles of\[{{\text{H}}_{\text{2}}}\]in 0.224 L of hydrogen gas at STP (273 K, 1 atm), is

    A) 0.1

    B) 0.01

    C) 0.001

    D) 1

    View Answer play_arrow
  • question_answer99) The molecule which has zero dipole moment is

    A) \[C{{H}_{3}}Cl\]

    B) \[N{{F}_{3}}\]

    C) \[B{{F}_{3}}\]

    D) \[Cl{{O}_{2}}\]

    View Answer play_arrow
  • question_answer100) Green house effect is caused by

    A) \[N{{O}_{2}}\]

    B) \[CO\]

    C) \[NO\]

    D) \[C{{O}_{2}}\]

    View Answer play_arrow
  • question_answer101) Algae attached to stone is called

    A) epilithic

    B) epifolic

    C) coenolithic

    D) None of these

    View Answer play_arrow
  • question_answer102) Prokaryotic ribosome has sedimentation coefficient of

    A) \[80S\]

    B) \[70S\]

    C) \[40S\]

    D) \[60S\]

    View Answer play_arrow
  • question_answer103) Scientific name of green gram is

    A) Vigna mungo

    B) Vigna radiate

    C) Phaseolus mungo

    D) Phaseolus sinensis

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  • question_answer104) Rhizophora sp. is characteristic of

    A) tropical rainforest

    B) tropical deciduous forest

    C) mangrove belt

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer105) Serum is

    A) blood without fibrinogen

    B) lymph without corpuscles

    C) blood without corpuscles and fibrinogen

    D) lymph

    View Answer play_arrow
  • question_answer106) Animals eating own faecal matter are

    A) sanguivorous

    B) frugivorous

    C) coprophagous

    D) detritivorous

    View Answer play_arrow
  • question_answer107) Periderm is formed by

    A) phellem

    B) phelloderm

    C) phellogen

    D) All of these

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  • question_answer108) A fleshy-fruit with leathery exocarp is called

    A) drupe

    B) berry

    C) pome

    D) hesperidium

    View Answer play_arrow
  • question_answer109) Osmoregulation in Paramecium is a function of

    A) contractile vacuole

    B) trichocysts

    C) cytopyge

    D) cytostome

    View Answer play_arrow
  • question_answer110) Severe Acute Respiratory Syndrome (SARS)

    A) is caused by a variant of Pneumococcus pneumoniae

    B) is caused by a variant of the common cold virus (corona virus)

    C) is an acute form of asthma

    D) affects non-vegetarians much faster than the vegetarians

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  • question_answer111) Common featue of Euglena, Amoeba, Trypanosoma and Entamoeba is

    A) binary fission

    B) multiple fission

    C) holozoic nutrition

    D) contractile vacuole

    View Answer play_arrow
  • question_answer112) In higher vertebrates, SA-node helps in

    A) conduction of blood

    B) initiation of heart beat

    C) opening of tricuspid valve

    D) opening of bicuspid value

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  • question_answer113) Minamata disease is caused due to presence of........ in water.

    A) cadmium

    B) lead

    C) arsenic

    D) mercury

    View Answer play_arrow
  • question_answer114) A lake with an inflow of domestic sewage rich in organic waste may result in

    A) drying of the lake very soon due to algal bloom

    B) an increased production of fish due to lot of nutrients

    C) death of fish due to lack of oxygen

    D) increased population of aquatic food web organisms

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  • question_answer115) Storage food of fungi is

    A) glucose

    B) glycogen

    C) carbohydrate

    D) starch

    View Answer play_arrow
  • question_answer116) Root cap is absent in

    A) Pandanus

    B) Pistia

    C) Ipomoea

    D) mangrove

    View Answer play_arrow
  • question_answer117) The structure present in cyanobacteria (BGA) helping in nitrogen-fixation is

    A) haplosperm

    B) holostrum

    C) holotrema

    D) heterocyst

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  • question_answer118) Triple fusion in angiosperms is the fusion of second sperm with

    A) antipodal cell and one synergid cell

    B) two antipodal cells

    C) two synergid cells

    D) two polar nuclei

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  • question_answer119) Litmus is obtained from

    A) lichen

    B) algae

    C) fungi

    D) Protozoa

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  • question_answer120) Which amino acids are present in histones?

    A) Lysine and histidine

    B) Valine and histidine

    C) Arginine and lysine

    D) Arginine and histidine

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  • question_answer121) The stack of vesicles found inside plastids is

    A) thylakoid

    B) granum

    C) stroma

    D) oxysomes

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  • question_answer122) A plant which lives for a few days is called

    A) annual

    B) perennial

    C) biennial

    D) ephemeral

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  • question_answer123) Simlipal is a

    A) national park

    B) sanctuary

    C) biosphere reserve

    D) zoo

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  • question_answer124) Ions that must be present for binding the cross bridges is

    A) \[N{{a}^{+}}\]

    B) \[C{{a}^{2+}}\]

    C) \[{{K}^{+}}\]

    D) \[M{{g}^{+}}\]

    View Answer play_arrow
  • question_answer125) Recognition sequence in Eco RI is

    A) GAATTC

    B) GGCC

    C) AAGCTT

    D) CTGCAG

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  • question_answer126) The species listed in Red Data Book are

    A) threatened

    B) endangered

    C) rare

    D) All of these

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  • question_answer127) Which is non-reducing sugar?

    A) Glucose

    B) Galactose

    C) Mannose

    D) Sucrose

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  • question_answer128) L Dreaming occurs in

    A) a-sleep

    B) REM sleep

    C) deep sleep

    D) slow wave sleep

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  • question_answer129) Which of the following term is used to describe the component isolated from a plant, for in vitro culturing in the specific medium?

    A) Callus

    B) Embryoid

    C) Synthetic seeds

    D) Explant

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  • question_answer130) Which is not true about spherosomes?

    A) Arise from endoplasmic reticulum

    B) Related to fat

    C) Single membrane bound structure

    D) Involved in photorespiration

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  • question_answer131) Inflorescence of family-Compositae is

    A) perianth

    B) lodicule

    C) capitulum

    D) hypanthodium

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  • question_answer132) Which of the following possesses a hard exoskeleton formed by calcium carbonate?

    A) Physalia

    B) Aurelia

    C) Gorallium

    D) Halistemma

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  • question_answer133) In man, four phenotypes of blood groups are due to the presence of antigen-A and antigen-B on the RBC. The chromosome that has the gene to control these antigens is

    A) X-chromosome

    B) 21st chromosome

    C) 9th chromosome

    D) 7th chromosome

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  • question_answer134) During the development of zygote of earthworm, macromeres develop into

    A) mesoderm

    B) endoderm

    C) ectoderm

    D) All of these

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  • question_answer135) Which of the following animals is not only a living fossil but also considered as connecting link?

    A) Sphenodon

    B) Limulus

    C) Neopilina

    D) Latimeria

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  • question_answer136) Which one of the following families shows both freedom and fusion in four successive whorls of the flower from exterior in different members?

    A) Malvaceae

    B) Solanaeeae

    C) Asteraceae

    D) Liliaceae

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  • question_answer137) The scientist, who through his extensive researches found that the regular recurrence of rust disease every years on wheat plants in India is due to the pathogenic fungal inoculum carried through wind currents from hills to plains

    A) MOP tyengar

    B) MS Swaminathan

    C) P Maheshwari

    D) KC Mehta

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  • question_answer138) A term helotism is used for the symbiosis of

    A) algae and fungi

    B) algae and Cycas

    C) algae and bacteria

    D) Pmus and fungi

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  • question_answer139) Which one of the following statements is incorrect about the properties of DNA?

    A) DNA is denatured when heated up to \[70{{\,}^{o}}C\]

    B) DNA shows high absorption of UV radiation at \[\text{260}\,\text{ }\!\!\mu\!\!\text{ m}\]

    C) DNA directly participates in protein synthesis

    D) Pyrimidines of DNA are cytosine and thymine

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  • question_answer140) Which of the following pairs in angiosperms are diploid and triploid respectively?

    A) Secondary nucleus and endosperm

    B) Microspore mother cell and egg cell

    C) Polar nucleus and secondary nucleus

    D) Endosperm and antipodal cells

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  • question_answer141) Wearing isolated a dormancy inducing substance from the leaves of a plant. From which type of gynoecium does the fruit of that plant develop?

    A) Bicarpellary syncarpous gynoecium with inferior ovary

    B) Bicarpellary syncarpous gynoecium with superior ovary

    C) Tricarpellary syncarpous gynoecium with superior ovary

    D) Monocarpellary gynoecium with half inferior ovary

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  • question_answer142) In a tetradynamous androecium, one of the following is seen.

    A) Outer whorl of four smaller stamens and inner whorl of two larger stamens

    B) Outer whorl of two larger stamens and inner whorl of four smaller stamens

    C) Outer whorl of four larger stamens and inner whorl of two smaller stamens

    D) Outer whorl of two smaller stamens and inner whorl of four larger stamens

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  • question_answer143) When a cross is conducted between black feathered hen and a white-feathered cock, blue-feathered fowls are formed. When these fowls are allowed for interbreeding, in \[{{\text{F}}_{2}}-\]generation, there are 20 blue fowls. What would be the number of black and white fowls?

    A) Black 20, white 10

    B) Black 20, white 20

    C) Black 10, white 10

    D) Black 10, white 20

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  • question_answer144) In which one of the following reactions, oxidative decarboxylation does not occur?

    A) Malic acid \[\to \] Pyruvic acid

    B) Pyruvic acid \[\to \] Acetyl Co-A

    C) Glyceraldehyde-3-phosphate\[\to \] 1, 3-bisphosphoglyceric acid

    D) \[\alpha -\] ketoglutaric acid \[\to \] Succinyl Co-A

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  • question_answer145) Efferent salivary ducts in Periplaneta open into

    A) stomach

    B) base of pharynx

    C) base of hypopharynx

    D) base of oesophagus

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  • question_answer146) The nasal chamber of rabbit has three thin twisted bony plates called conchae. They are lined by

    A) striated cuboidal epithelium

    B) simple cuboidal epithelium

    C) simple squamous epithelium

    D) simple ciliated columnar epithelium

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  • question_answer147) Which one of the following enzymes has no role in protein synthesis?

    A) RNA polymerase

    B) Restriction endonuclease

    C) Amino acyl synthetase

    D) Peptidyl transferase

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  • question_answer148) Each male genital opening of Pheretima has separate opening of

    A) two ducts

    B) three ducts

    C) five ducts

    D) four ducts

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  • question_answer149) Mammals evolved from therapsid reptiles in Triassic period. The type of skull in these reptiles is

    A) anapsid skull

    B) parapsid skull

    C) synapsid skull

    D) diapsid skull

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  • question_answer150) When a cow is crossed to a bull and the female progeny is yielding more milk than its mother. From this, it is inferred

    A) more number of genes for high yielding milk are inherited, only from the female parent

    B) more number of genes for high yielding milk are inherited only the male parent

    C) more number of genes for high yielding milk are inherited from both the parents

    D) the progeny through mutation achieved more number of genes for high yielding milk.

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