Question

Match the components in column I with the percentage by volume in column II as per the composition of air.

• A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
• B. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
• C. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
• D. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Answer 1

The correct option is D

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Air is a mixture of gases, water vapour and dust particles. Nitrogen and oxygen are the major components of air. Nitrogen occupies 78% of the air. Oxygen occupies 21% of the air. Carbon dioxide is present in traces and is approximately 0.03 % the rest are other gases which make 0.97 % of the total air by volume.