NDA 2022 (1) General Knowledge Questions
NDA Questions51. What is the mass of a material, whose specific heat capacity is 400 J/(kg °C) for a rise in temperature from 15°C to 25°C, when heat received is 20 kJ ?
(a) 0.1 kg
(b) 1 kg
(c) 10 kg
(a) 5 kg

52. The specific latent heat of vaporization of a substance is the quantity of heat needed to change unit mass from
(a) liquid to vapour with a change of temperature
(b) liquid to vapour without a change of temperature
(c) vapour to liquid without a change of temperature
(d) vapour to liquid with a change of temperature
53. Evaporation from the surface of a given liquid takes place more rapidly when
(a) the temperature is high and the surface area of the liquid is large
(b) the temperature is low and the surface area of the liquid is large
(c) the temperature is low and the surface area of the liquid is small
(d) the temperature is high and the surface area of the liquid is small
54. Which of the following statements correctly explains/explain the existence of a positive force between two electric charges?
- Both the charges are positive.
- Both the charges are negative.
- Both the charges are oppositely charged.
Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) 1 and 2 only
(d) 1, 2 and 3
55. An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the equivalent resistance of this combination?
(a) 2 ohm
(b) 10 ohm
(c) 0.S ohm
(d) 5 ohm
56. The electric field lines from an isolated positively charged conducting sphere are
(a) tangential to the conducting surface
(b) at right angles to the conducting surface and towards the centre of the sphere
(c) at any angle to the conducting surface
(d) at right angles to the conducting surface and outwards from the centre of the sphere
57. Which one of the following is not a solution?
(a) Alloy
(b) Milk
(c) Air
(a) Sugar
61. Which one of the following is a covalent compound?
(a) Calcium oxide
(b) Sodium nitride
(c) Silicon carbide
(d) Zinc sulphide
62. The mass number of argon is 40. Which one of the following statements is correct?
(a) The number of protons in argon is 22.
(b) The number of neutrons in argon is 18.
(c) The number of electrons in argon is 18.
(d) The sum of numbers of protons and electrons in argon is 40.
63. Which one of the following is the correct order of the valencies of elements Ne, Si, N and Mg?
(a) Ne < Mg < N < Si
(b) Si < N < Mg < Ne
(c) Ne < N < Si < Mg
(d) Mg < Ne < N < Si
64. The frequency of an alternating current is 3 Hz. It implies that
(a) there are 6 cycles/s
(b) there are 3 cycles/s
(c) there are 2 cycles/s
(d) there is only 1 cycle/s
67. The magnetic field produced by a current-carrying straight wire at a point outside the wire depends
(a) inversely on the distance from it
(b) directly on the distance from it
(c) inversely at short distances and directly at large distances from it
(d) directly on the distance (at short distances) and inversely on the distance (at long distances) from it
72. Which one of the following plant plastids stores starch, oil and protein granules?
(a) Chloroplast
(b) Leucoplast
(c) Chromoplast
(d) Xanthoplast
74. In aquatic plants, large air sacs give them buoyancy effects. These sacs are surrounded by which one of the following types of tissues?
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma
(d) Complex tissue
75. Which one of the following belongs to ‘Pisces’?
(a) Dogfish
(b) Jellyfish
(c) Silverfish
(d) Starfish
76. Which one of the following groups is called ‘amphibians of plant kingdom’ ?
(a) Bryophytes
(b) Thallophytes
(c) Pteridophytes
(d) Gymnosperms
77. Which one of the following is caused by a bacterial pathogen?
(a) AIDS
(b) Dengue fever
(c) COVID-19
(a) Typhoid fever
78. The twinkling of a star is due to the atmospheric
(a) diffraction of starlight
(b) reflection of starlight
(c) refraction of starlight
(d) dispersion of starlight
79. A mass M is dragged by a pulley on a horizontal plane by a force anti-parallel to its displacement. The work done in pulling the mass M is
(a) zero
(b) positive
(c) infinite
(d) negative
94. A cell is unable to synthesize lipids. Which of its cell organelles might be defective?
(a) Smooth endoplasmic reticulum
(b) Golgi bodies
(c) Lysosomes
(d) Mitochondria
95. All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is
(a) a downward force
(b) a downward pressure
(c) an upward force
(d) an upward pressure