Air is said to be a mixture because air at different places contains different amounts of various gases.

True

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False

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Solution

The correct option is A True
Mixtures are formed when different substances are mixed in any proportion. Air contains different gases. The gases in the air are mainly nitrogen, oxygen, and a small amount of carbon dioxide and other gases. The amount of these gases is not fixed and can vary from place to place. For example, in an industrial area, the amount of $C O_{2}$ will be more due to pollution. Thus air is a mixture as its composition differs.

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Question 1
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(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Argon

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(i) Air is a mixture of several gases.
(ii) Air exerts pressure.
(iii) The composition of air is constant at all places.

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