General Knowledge MCQs - 7

61. Which river forms the Grand Canyon in the United States?
(a) Mississippi
(b) Hudson
(c) Colorado-
(d) Columbia

62. Which of these cloud forms is found at the highest altitudes?
(a) Billow
(b) Nacreous
(c) Noctilucent-
(d) Pileus

63. Thickness of atmosphere around the earth is
(a) 100 km
(b) 130 km
(c) 145 km-
(d) 195 km

64. Atmosphere around the earth maintains its
(a) Temperature-
(b) Pressure
(c) Density
(d) Shape

65. The layers of atmosphere are divided into
(a) Two parts
(b) Three parts
(c) Four parts-
(d) Five parts

66. Above the earth’s surface, troposphere extends to a height of -.
(a) 08 km
(b) 12 km
(c) 20 km
(d) 15 km-

67. Which next layer is above the troposphere?
(a) Mesosphere
(b) Stratosphere-
(c) Thermosphere
(d) Space

68. The mesosphere extended above the earth’s surface is upto ——.
(a) 60 km
(b) 65 km
(c) 80 km
(d) 85 km-

69. Which one of the following phenomena occurs when water vapour condenses around a particle of smoke?
(a) Fog
(b) Hail
(c) Mist
(d) Smog-

70. Lines joining places of the same earthquake intensity are known as .
(a) Isohyets
(b) Isohels
(c) Isoseismal lines-
(d) Isohalines