Class 11 Geography Chapter 7 Composition and Structure of Atmosphere NCERT Exercise Solution (English Medium)
Class 11 Geography Chapter 7 Composition and Structure of Atmosphere NCERT Exercise Solution (English Medium) 1. Multiple choice questions. (i) Which one of the following gases constitutes the major portion of the atmosphere? (a) Oxygen (c) Argon (b) Nitrogen (d) Carbon dioxide Ans. (b) Nitrogen (78%) (ii) Atmospheric layer important for human beings is: (a) Stratosphere (c) Troposphere (b) Mesosphere (d) Ionosphere Ans. (c) Troposphere (iii) Sea salt, pollen, ash, smoke soot, fine soil — these are associated with: (a) Gases (c) Water vapour (b) Dust particles (d) Meteors Ans. (c) Water vapour (iv) Oxygen gas is in negligible quantity at the height of atmosphere: (a) 90 km (c) 100 km (b) 120 km (d) 150 km Ans. (b) 120 km (v) Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation? (a) Oxygen (c) Helium (b) Nitrogen (d) Carbon dioxide Ans. (d) Carbon dioxide 2. Answer the following...