MCAT Practice Test - Page 3

Q. 44. If the distance between two bodies each 1 kg is 1 meter, then the force of attraction between these two bodies is:

1. A. 9 × 10⁹ N
2. B. 3 × 10⁻¹¹ N
3. C. 6.67 × 10⁻¹¹ N
4. D. 8.8 × 10⁻¹² N

Q. 45. White light does not converge on a single point after passing through convex lens because of:

1. A. Chromatic aberration
2. B. Spherical aberration
3. C. Distortion
4. D. Both spherical and chromatic aberration

Q. 46. A pendulum of length L has a period T. If the period is doubled, the length of the pendulum is:

1. A. Doubled
2. B. Halved
3. C. Quadrupled
4. D. Increased by

Q. 47. If volume of a given mass of a gas is doubled without changing its temperature, the density of the gas:

1. A. Is doubled
2. B. Remains unchanged
3. C. Is halved
4. D. Is reduced to ¼ of the original value

Q. 48. How much average force should be applied to a 2500 kg car, having velocity of 30 m/s, in order to stop it in 15 seconds?

1. A. 1000 N
2. B. 6000 N
3. C. 5000 N
4. D. 8000 N

Q. 49. Graphite is used in nuclear reactors for specific purpose:

1. A. Absorb neutrons
2. B. Slow down neutrons
3. C. Absorb alpha particles
4. D. Slow down high-speed electrons

Q. 50. If velocity of 11 × 10³ m/s is needed to escape a rocket from gravitational pull, how much velocity will be needed to escape a cricket-ball?

1. A. 11 × 10⁶ m/s
2. B. 11 × 10⁵ m/s
3. C. 11 × 10⁴ m/s
4. D. 11 × 10³ m/s

Q. 51. A body is projected with high velocity at 45° with ground, which falls after 15 seconds. Its horizontal component of velocity during its motion will:

1. A. Increase
2. B. Decrease
3. C. Remain constant
4. D. First decrease then increase

Q. 52. Neutrons penetrate matter easily because they:

1. A. Occupy no more than one-tenth of the volume of electrons
2. B. Are electrically neutral
3. C. Occupy no more than one-tenth of the volume of protons
4. D. Have smaller mass than protons

Q. 53. The frequency of second’s pendulum is:

1. A. 2 Hertz
2. B. 0.5 Hertz
3. C. 1 Hertz
4. D. 0.25 Hertz

Q. 54. If tension in the string remains constant but the diameter of the string is doubled, what will be the effect on speed of transverse waves in the string?

1. A. Remains constant
2. B. Becomes double
3. C. Becomes half
4. D. Decreases four times

Q. 55. Pressure, exerted on a surface with some force, is:

1. A. Directly proportional to the surface area
2. B. Inversely proportional to the surface area
3. C. Directly proportional to the force
4. D. None of them

Q. 56. The equation for Ampere’s law is:

1. A. µ₀I = Bπr
2. B. µ₀I = Bπr²
3. C. µ₀I = B²πr
4. D. µ₀I = Bπ²r²

Q. 57. A rate of change of angular momentum of a body is equivalent to:

1. A. Impulsive force
2. B. The applied torque
3. C. Applied force
4. D. Moment of inertia

Q. 58. Which of the following is equivalent to one Pascal of gas pressure?

1. A. 1 kg·m²/s²
2. B. 1 kg·m³/s²
3. C. 1 kg/(m·s²)
4. D. 1 kg·m/s

Q. 59. When a radio station is broadcasting a musical program, the antenna of its transmitter:

1. A. Radiates AF electromagnetic waves
2. B. Radiates longitudinal waves
3. C. Radiates RF electromagnetic waves
4. D. Radiates AF longitudinal waves

Q. 60. A copper rod has a resistance of 40 Ω at 0°C and a resistance of 56 Ω at 100°C. What is the temperature coefficient of resistance of copper?

1. A. 2 × 10⁻⁴ K⁻¹
2. B. 4 × 10⁻³ K⁻¹
3. C. 4 × 10⁻⁴ K⁻¹
4. D. 8 × 10⁻⁴ K⁻¹

CHEMISTRY

Q. 61. As we move away from nucleus, the distance between the shells:

1. A. Remains same
2. B. Increases
3. C. Decreases
4. D. Sometimes increases and sometimes decreases

Q. 62. Which metal has least tendency to form a positive ion?

1. A. Aluminum
2. B. Calcium
3. C. Iron
4. D. Sodium

Q. 63. Detergents are:

1. A. Natural products
2. B. Synthetic products
3. C. Both A and B
4. D. None of the above

Q. 64. Which gas is formed when ammonium chloride is heated with aqueous sodium hydroxide?

1. A. Ammonia
2. B. Chlorine
3. C. Hydrogen
4. D. Nitrogen

Q. 65. The atomic size of an atom is:

1. A. Greater than the positive ion
2. B. Smaller than the positive ion
3. C. Greater than the negative ion
4. D. Equal to covalent radius

Q. 66. If iron sheet is dipped in a solution of zinc chloride and heated, then a layer of zinc is formed that protects iron from rusting. This process is called:

1. A. Anodizing
2. B. Chrome plating
3. C. Galvanizing
4. D. Tin plating