MCQOPTIONS
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MCQOPTIONS
This section includes 101 Mcqs, each offering curated multiple-choice questions to sharpen your JIPMER knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The magnitude of screening effect depends upon the number of |
| A. | inner electrons |
| B. | outer electrons |
| C. | bond order |
| D. | Both (a) and (b) |
| Answer» B. outer electrons | |
| 52. |
Which of the following statements is incorrect? |
| A. | Polypropylene is a thermoplastic polymer |
| B. | Melamine-formaldehyde is a thermosetting polymer |
| C. | Mixture of styrene and methyl methacrylate can form ionic addition polymer |
| D. | Low-density polythene is a poor conductor of electricity |
| Answer» D. Low-density polythene is a poor conductor of electricity | |
| 53. |
On the basis of Langmuir adsorption isotherm the amount of gas adsorbed at very high pressure. |
| A. | Reaches a constant limiting value |
| B. | Goes on increasing with pressure |
| C. | Goes on decreasing with pressure |
| D. | First increasing and then decreasing with pressure |
| Answer» B. Goes on increasing with pressure | |
| 54. |
When an iron object is plated with tin, tin does not act as sacrificial anode in protecting against corrosion, because |
| A. | tin is more reactive than iron |
| B. | tin is less reactive than iron |
| C. | reactivity of tin and iron is same |
| D. | tin is oxidizing agent while iron is not so |
| Answer» C. reactivity of tin and iron is same | |
| 55. |
Lauryl alcohol on treatment with H2SO4 followed by neutralization forms a product which is |
| A. | cationic detergent |
| B. | anionic detergent |
| C. | neutral detergent |
| D. | antidepressant |
| Answer» C. neutral detergent | |
| 56. |
Choose the correct statement from the following |
| A. | NH4+ and CH4 are not isoelectronic species |
| B. | BF3 does not have dipole moment |
| C. | O – Cl – O obeys octet rule |
| D. | O− in O3 is sp3-hybridized |
| Answer» C. O – Cl – O obeys octet rule | |
| 57. |
When excess of NaOH solution is added to aqueous solution of iodine, the colour of solution becomes |
| A. | blue |
| B. | yellow |
| C. | colourless |
| D. | pale green |
| Answer» D. pale green | |
| 58. |
In [CO(H2O)6]2+, there are three unpaired electrons present. The μexperimental of 4.40 BM. This is because of |
| A. | increase in number of unpaired electrons |
| B. | some contribution of the orbital motion of the electron to the magnetic moment |
| C. | change in orbital spin of the electron |
| D. | d-d transition |
| Answer» C. change in orbital spin of the electron | |
| 59. |
Two similar reactions have the same rate constant at 25°C but at 35°C, one of the reaction has a higher rate constant than the other. The appropriate reason for this is |
| A. | due to effective collisions |
| B. | due to different activation energies |
| C. | due to different threshold energies |
| D. | due to higher population of molecules |
| Answer» C. due to different threshold energies | |
| 60. |
Beryllium differs in properties from other elements of its own group but shows resemblance with aluminium because of |
| A. | relatively bigger ionic radius and high polarizing power of Be |
| B. | relatively smaller ionic radius and high polarizing power of Be |
| C. | relatively bigger ionic radius is the only reason behind this |
| D. | None of the above |
| Answer» C. relatively bigger ionic radius is the only reason behind this | |
| 61. |
Work is being performed, when a weight lifter lifts a base ball off a weight rack. This is due to |
| A. | magnetic attraction |
| B. | gravity |
| C. | electrostatic repulsion |
| D. | mechanical force |
| Answer» C. electrostatic repulsion | |
| 62. |
The E° values for Mn and Zn are more negative than expected because negative than expected because |
| A. | they have either half-filled and fully-filled configurations |
| B. | they can easily donate electrons |
| C. | it is Quite easy to remove electrons from their orbitals |
| D. | None of the above |
| Answer» B. they can easily donate electrons | |
| 63. |
The melting point of solid substances is directly proportional to pressure acting on them. However, ice-melts at a temperature lower than its usual melting point, when the pressure increases. This is because |
| A. | ice is not a true solid |
| B. | the bonds break under pressure |
| C. | ice is loss dense than water |
| D. | pressure generates heat |
| Answer» D. pressure generates heat | |
| 64. |
Aqueous solution of AlCl3 is acidic towards litmus while of NaCl is not. The correct reason behind this is |
| A. | AlCl3 furnishes OH− ion in the solution |
| B. | AlCl3 furnishes H+ ion in the solution |
| C. | AlCl3 furnishes both H+ well as OH− ion in the solution |
| D. | AlCl3 is the salt of strong base and strong acid |
| Answer» C. AlCl3 furnishes both H+ well as OH− ion in the solution | |
| 65. |
Actinides exhibit larger number of oxidation state than that of corresponding lanthanides. The reason behind this aspect is |
| A. | lesser energy difference between 5f and 6d-orbitals than between 4f and 5d-orbitals |
| B. | larger atomic size of actinides than the lanthanides |
| C. | more energy difference between 5f and 6d orbitals than between 4f and 5d-orbitals |
| D. | greater reactive nature of the actinides than the lanthanides |
| Answer» B. larger atomic size of actinides than the lanthanides | |
| 66. |
Choose the incorrect statement about noble gas? |
| A. | Boiling point increases with increasing atomic mass |
| B. | Helium has least tendency to form compound |
| C. | Noble gases have some value of electron affinity |
| D. | Xenon has maximum number of compounds |
| Answer» D. Xenon has maximum number of compounds | |
| 67. |
Which of the following hydrocarbons is the most reactive towards addition of H2SO4? |
| A. | Ethene |
| B. | Propylene |
| C. | 3-methyl but-1-ene |
| D. | 1-butene |
| Answer» D. 1-butene | |
| 68. |
At 27°C one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. Choose the correct option from the following. |
| A. | Change in internal energy is positive |
| B. | Heat is negative |
| C. | Work done is −965.84 cal |
| D. | All are incorrect |
| Answer» C. Work done is −965.84 cal | |
| 69. |
Ethers like ROR can be cleaved by concentrated HI but not by HCl because |
| A. | I− is a weaker nucleophile than Cl− |
| B. | I− is stronger nucleophile than Cl− |
| C. | SN1 mechanism carried out in this reaction is rapidly in presence of HI. |
| D. | None of the above |
| Answer» C. SN1 mechanism carried out in this reaction is rapidly in presence of HI. | |
| 70. |
Solid NaHCO3 will be neutralized by 40.0 mL of 0.1 M H2SO4 What would be the weight of solid NaHCO3 in gram? |
| A. | 0.672 g |
| B. | 6.07 g |
| C. | 17 g |
| D. | 20 g |
| Answer» B. 6.07 g | |
| 71. |
When 2-methyl butyl bromide is treated with sodium ethoxide in ethanol, what will be the major product? |
| A. | 2-methyl but-2-ene |
| B. | 3-methyl but-1-ene |
| C. | 2-methyl but-1-ene |
| D. | 2-methyl sodium-butoxide |
| Answer» B. 3-methyl but-1-ene | |
| 72. |
What will be the number of waves formed by a Bohr electron in one complete revolution in its second orbit? |
| A. | Three |
| B. | Two |
| C. | One |
| D. | Zero |
| Answer» C. One | |
| 73. |
Temperature of a gas is t K. What would be the temperature at which volume and pressure, both will reduced to half of the initial values? |
| A. | t/2 |
| B. | t/4 |
| C. | t/3 |
| D. | t/8 |
| Answer» C. t/3 | |
| 74. |
A prism of a certain angle deviates the red and blue rays by 8 and 12, respectively. Another prism of the same angle deviates the red and blue rays by 10 and 14, respectively. The prism are small angled and made of different materials. The dispersive power of the materials of the prisms are in the ratio |
| A. | 5 : 6 |
| B. | 9 : 11 |
| C. | 6 : 5 |
| D. | 11 : 9 |
| Answer» D. 11 : 9 | |
| 75. |
The volume of an ideal gas is doubled in an isothermal process. Then, which of the following is true? |
| A. | Work done by the gas is positive |
| B. | Work done by the gas in negative |
| C. | Internal energy of the system decreases |
| D. | Internal energy of the system increases |
| Answer» B. Work done by the gas in negative | |
| 76. |
The transfer ratio β of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 2 kΩ. The peak value of the collector AC current for and AC input voltage of 0.02 V peak is |
| A. | 200 μA |
| B. | 0.01 mA |
| C. | 0.25 mA |
| D. | 500 μA |
| Answer» E. | |
| 77. |
A liquid of density 800 kg/m3 is filled in a cylindrical vessel upto a height of 3 m. This cylindrical vessel stands on a horizontal plane. There is circular hole on the side of the vessel. What should be the minimum diameter of the hole to move the vessel on the floor, if plug is removed. Take the coefficient of friction between the bottom of the vessel and the p lane as 0.5 and total mass of vessel plus vessel as 95 kg. |
| A. | 0.107 m |
| B. | 0.053 m |
| C. | 0.206 m |
| D. | 0.535 m |
| Answer» B. 0.053 m | |
| 78. |
The slope of isothermal and adiabatic curves are related as |
| A. | isothermal curve slope = adiabatic curve slope |
| B. | isothermal curve slope = γ × adiabatic curve slope |
| C. | adiabatic curve slope = γ × isothermal curve slope |
| D. | adiabatic curve slope = 1/2 × isotherma curve slope |
| Answer» D. adiabatic curve slope = 1/2 × isotherma curve slope | |
| 79. |
An ideal solenoid having 5000 turns/m has an aluminium core and carries a current of 5A. If χAl = 2.3 × 10−5, then the magnetic field developed at centre will be |
| A. | 0.031 T |
| B. | 0.048 T |
| C. | 0.027 T |
| D. | 0.050 T |
| Answer» B. 0.048 T | |
| 80. |
The length of a given cylindrical wire is increased by 150%. Due to consequent decrease in diameter the change in the resistance of the wire will be |
| A. | 200% |
| B. | 525% |
| C. | 300% |
| D. | 400% |
| Answer» C. 300% | |
| 81. |
The total charge induced in a conducting loop when it is moved in magnetic field depends on |
| A. | the rate of change of magnetic flux |
| B. | initial magnetic flux only |
| C. | the total change in magnetic flux |
| D. | final magnetic flux only |
| Answer» D. final magnetic flux only | |
| 82. |
A galvanometer of resistance 25 Ω shows a deflection of 5 divisions when a current of 2 mA is passed through it. If a shunt of 4Ω is connected and there are 20 divisions on the scale, then the range of the galvanometer is |
| A. | 1 A |
| B. | 58 A |
| C. | 58 mA |
| D. | 30 mA |
| Answer» D. 30 mA | |
| 83. |
An energy of 68.0 eV is required to excite a hydrogen-like atom in its second Bohr energy level to third energy level the charge of nucleus is Ze. The wavelength of a radiation required to eject the electron from first orbit to infinity is |
| A. | 2.2 nm |
| B. | 2.85 nm |
| C. | 3.2 nm |
| D. | 2.5 nm |
| Answer» E. | |
| 84. |
Angular width of central maximum in the Fraunhoffer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000 Å. When the slit is illuminated by light of another wavelength, then the angular width decreases by 30%. The same decrease in angular width of central maximum is obtained when the original apparatus is immersed in a liquid. The refractive index of the liquid will be |
| A. | 1.25 |
| B. | 1.42 |
| C. | 1.67 |
| D. | 1.5 |
| Answer» C. 1.67 | |
| 85. |
The magnification produced by a astronomical telescope for normal adjustment is 10 and the length of the telescope is 1.1 m. The magnification, when the image is formed atleast distance of distinct vision is |
| A. | 6 |
| B. | 18 |
| C. | 16 |
| D. | 14 |
| Answer» E. | |
| 86. |
A body is moving along a rough horizontal surface with an initial velocity of 10 ms−1. If the body comes to rest after travelling a distance of 12 m, then the coefficient of sliding friction will be |
| A. | 0.5 |
| B. | 0.2 |
| C. | 0.4 |
| D. | 0.6 |
| Answer» D. 0.6 | |
| 87. |
A rod made up of metal is 1.2 m long and 0.8 cm diameter. Its resistance is 3.5 × 10−3 Ω. Another disc made of the same metal is 2.0 cm in diameter and 1.25 mm thick. What is the resistance between the round faces of the disc? |
| A. | 1.35 × 10−8 Ω |
| B. | 2.70 × 10−7 Ω |
| C. | 5.82 × 10−7 Ω |
| D. | 8.10 × 10−5 Ω |
| Answer» D. 8.10 × 10−5 Ω | |
| 88. |
The charges on two spheres are +7 μC and −5 μC respectively. They experience of force F. If each of them is given an additional charge of −2μC, then the new force of attraction will be |
| A. | F |
| B. | F/2 |
| C. | F/√3 |
| D. | 2F |
| Answer» B. F/2 | |
| 89. |
A bat emitting an ultrasonic wave of frequency 4.5 × 104 Hz at speed of 6 m/s between two parallel walls. The two frequencies heared by the bat will be |
| A. | 4.67 × 104 Hz, 4.34 × 104 Hz |
| B. | 4.34 × 104 Hz, 4.67 × 104 Hz |
| C. | 4.5 × 104 Hz, 5.4 × 104 Hz |
| D. | 4.67 × 103 Hz, 4.34 × 104 Hz |
| Answer» C. 4.5 × 104 Hz, 5.4 × 104 Hz | |
| 90. |
A body a rest slides down a 30° inclined plane. The time taken by it to slide down is twice the time it takes when it slides down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is |
| A. | 0.43 |
| B. | 0.37 |
| C. | 0.64 |
| D. | 0.75 |
| Answer» B. 0.37 | |
| 91. |
If a proton and anti-proton come close to each other and annihilate, how much energy will be released? |
| A. | 1.5 × 10−10 J |
| B. | 3 × 10−10 J |
| C. | 4.5 × 10−10 J |
| D. | 2 × 10−10 J |
| Answer» C. 4.5 × 10−10 J | |
| 92. |
An isotropic point source emits light with wavelength 500 nm. The radiation power of source is P = 10 W. Find the number of photons passing through unit area per second at a distance of 3 m from the source. |
| A. | 5.92 × 1017/m2 s |
| B. | 2.23 × 1017/m2 s |
| C. | 2.23 × 1018/m2 s |
| D. | 5.92 × 1018/m2 s |
| Answer» C. 2.23 × 1018/m2 s | |
| 93. |
A square wire of side 2.0 c is placed 20 cm in front of a concave mirror of focal length 10 cm with its centre on the axis of the mirror and its plane normal to the axis. The area enclosed by the image of wire is |
| A. | 7.5 cm2 |
| B. | 6 cm2 |
| C. | 2 cm2 |
| D. | 4 cm2 |
| Answer» E. | |
| 94. |
Two wires are stretched through same distance. The force constant of second wire is half as that of the first wire. The ratio of work done to stretch first wire and second wire will be |
| A. | 2 : 1 |
| B. | 1 : 2 |
| C. | 3 : 1 |
| D. | 1 : 3 |
| Answer» B. 1 : 2 | |
| 95. |
The intensity of each of the two slits in Young’s double slit experiment is I0. Calculate the minimum separation between the points on the screen, where intensities are 2I0 and I0. If fringe width is b |
| A. | b/5 |
| B. | b/8 |
| C. | b/12 |
| D. | b/4 |
| Answer» D. b/4 | |
| 96. |
An L-C-R series circuit with a resistance of 100 Ω is connected to 200 V (AC source) and angular frequency 300 rad/s. When only the capacitor is removed, then the current lags behind the voltage by 60°. The average power dissipated in original L-C-R circuit is |
| A. | 50 W |
| B. | 100 W |
| C. | 200 W |
| D. | 400 W |
| Answer» E. | |
| 97. |
A block having 12g of element is placed in a room. This element is a radioactive element with half-life of 15 yr. After how many years will there be just 1.5 g of the element in the box? |
| A. | 40 yr |
| B. | 45 yr |
| C. | 20 yr |
| D. | 15 yr |
| Answer» C. 20 yr | |
| 98. |
A body is whirled in a horizontal circle of radius 25 cm. It has an angular velocity of 13 rad/s. What is its linear velocity at any point on circular path? |
| A. | 2 m/s |
| B. | 3 m/s |
| C. | 3.25 m/s |
| D. | 4.25 m/s |
| Answer» D. 4.25 m/s | |
| 99. |
A pan with a set of weights is attached to a light spring. The period of vertical oscillation is 0.5s. When some additional weights are put in pan, then the period of oscillations increases by 0.1s. The extension caused by the additional weight is |
| A. | 5.5 cm |
| B. | 3.8 cm |
| C. | 2.7 cm |
| D. | 1.3 cm |
| Answer» D. 1.3 cm | |
| 100. |
A fish rising vertically to the surface of water in a lake uniformly at the rate of 2 m/s observes a kingfisher diving vertically towards the water at a rate of 10 m/s. If refractive index of water n = 4/3, what will be the actual velocity o f the kingfisher |
| A. | 10 m/s |
| B. | 8 m/s |
| C. | 6 m/s |
| D. | 9 m/s |
| Answer» D. 9 m/s | |