General Science Page-7

61) Coke is made by heating coal in the absence of air at
(A) 700 °C
(B) 900 °C
(C) 1300 °C
(D) 1700 °C

62) In blood, the percentage of water is
(A) 75%
(B) 85%
(C) 90%
(D) 95%

63) As the temperature of ice rises, the ice melts and its density
(A) Decreases
(B) Remains constant
(C) Increases
(D) Increases up to 10 °C

64) Water is a universal solvent for what reactions.
(A) Physical
(B) Chemical
(C) Nuclear
(D) Biochemical

65) The volume percentage of nitrogen in air is
(A) 60%
(B) 67%
(C) 74%
(D) 78%

66) Nitrogen occur in plants and animals in the form of
(A) Minerals
(B) Proteins
(C) Fats
(D) Carbohydrates

67) Air contains volume of carbon dioxide approximately;
(A) 3%
(B) 33%
(C) 0.3%
(D) 0.003%

68) The gases which are used by divers as an artificial atmosphere are helium and ___
(A) Nitrogen
(B) Oxygen
(C) Neon
(D) Carbon monoxide

69) The second most abundant metal found in the earth's crust is
(A) Iron
(B) Aluminium
(C) Sodium
(D) Calcium

70) Which of the following is involved in blood clotting
(A) Sodium
(B) Magnesium
(C) Calcium
(D) Potassium



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