General Science – Exercise – 2

61. Carbon, diamond and graphite are together called

(a) allotropes
(b) isomers
(c) isomorphs
(d) isotopes

62. Soda water contains

(a) carbonic acid
(b) sulphuric acid
(c) carbon dioxide
(d) nitrous acid

63. LPG consists of mainly

(a) methane, ethane and hexane
(b) ethane, hexane and nonane
(c) methane, hexane and nonane
(d) methane, butane and propane

64. Which of the following is in liquid form at room temperature?

(a) Lithium
(b) Sodium
(c) Francium
(d) Cerium

65. Which of the following was to be discovered first in the chromospheres of the sun?

(a) Krypton
(b) Xenon
(c) Neon
(d) Helium

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