Question

what is the pure substance / mixture of air

Answer 1

Answer:

Pure substance is elements like copper iron etc. whereas mixture include iron Sulphur copper iron mixture i.e. impure substance

Answer 2

Answer:

Pure substances are the substances which are made up of molecules containing the same kind of atoms, and is always homogeneous in nature.

Example: A copper block, Carbon dioxide (all molecules of it are made up of one atom of carbon and two atoms of oxygen)

Air is a mixture since it contains various gases, such as oxygen, nitrogen, carbon dioxide, water vapour, etc. contained in different proportions in different areas.

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