Question

Give reasons for the statement ‘Air is a mixture.’

Answer 1

Mixture - When two or more substances are mixed physically in any variable proportion in such a way that they retain their individual properties is called a mixture.

For example - Air, sand, and seawater.

Air is a mixture of different gases that are present in different proportions.

The composition of air is as follows -

• Nitrogen - 78%
• oxygen - 21%
• carbon dioxide - 0.04%
• other gases and dust particles - around 1%.

These gases do not react with each other under normal conditions and can be separated by various physical methods. Hence, air is a mixture.