61. Human Heart is enclosed by a sac known as the
(a) Atria (b) Chordae Tendineae
(c) Pericardium (d) Aorta
Answer: (c)
62. Acid Rain is produced by
(a) Excess NO₂and SO₂
from burning fossil fuels.
(b) Excess production of NH₃ by industries
(c) Excess release of CO by incomplete
combustion
(d) Excess formation of CO₂ by combustion and
animal respiration
Answer: (a)
63. A bone is connected to muscle with the help of
(a) Ligament (b) Cartilage
(c) Tendon (d) None of these
Answer: (c)
64. Which of the following blood groups enable a person to give to
any person?
(a) A (b) B
(c) AB (d) O
Answer: (d)
65. Fluoride pollution mainly affects
(a) Brain (b) Heart
(c) Teeth (d) Kidney
Answer: (c)
66. Chernobyl nuclear tragedy occurred in
(a) April 1986 (b) August 6, 1945
(c) August 9, 1945 (d) December3, 1984
Answer: (a)
67. About 70% of the total global carbon is found in
(a) Oceans (b) Forests
(c) Grasslands (d) agro ecosystems
Answer: (a)
68. Which of the following is an egg laying mammal?
(a) Kangaroo (b) Duck-billed
Platypus
(c) Penguin (d) Whale
Answer: (b)
69. Diabetes Insipidus occurs due to the hyposecretion of
(a) Thymosine (b) Oxytocin
(C) Insulin (d) Vasopressin
Answer: (b)
70. “The Inheritance of Acquired Characters” was proposed by
(a) Lamarck (b) Darwin
(c) Wallace (d) Miller
Answer: (a)
71. The deficiency of Vitamin A causes
(a) Night Blindness(b) Cataract
(c) Rickets (d) Pellagra
Answer: (a)
72. Myopia or Near-sightedness can be corrected by
(a) Biconvex Lens (b)Cylindrical
Lens
(c)Biconcave Lens (d)Surgical removal
Answer: (c)
73. Which is the smallest bone in the body?
(a) Malleus (b) Incus
(c) Stapes (d) Carpal
Answer: (c)
74. Which of the following is an Ozone depleting chemical?
(a) CFC (b) SO₂
(c) CO (d) CO₂
Answer: (a)
75. The 1992 Earth Summit was held in
(a) Paris (b) New York
(c) Rio de Janeiro (d) Kyoto
Answer: (c)
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