Question

.. Choose the correct or most appropriate answer : (i) Air consists of: (a) oxygen only (b) carbon dioxide only (c) nitrogen only (d) All the above
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Answer 1

Answer:

d is the answer

Explanation:

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Answer 2

Air is a  mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time.

Explanation: Air consist of -

1. 78 percent nitrogen and 21 percent oxygen.

2.Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.

3.Acc to question all the above is correct .