Question

Comment: “Air is a mixture and water is a compound”.

Answer 1

Air is a mixture

1. Mixture: A mixture is a material containing two or more substances in varying proportions but not chemically combined.
2. We know that air is a mixture of gas in gas.
3. Air is a homogeneous mixture of a number of gases.
4. Its two main constituents are: Oxygen $\left(21\%\right)$and Nitrogen$\left(78\%\right)$. The other gases are present in very small quantities.
5. It can be split into a simpler substance via physical techniques.

Water is a compound

1. Compounds: Compounds are chemical substances made up of two or more different type of elements that are chemically bound together in a fixed ratio.
2. Water$\left({\mathrm{H}}_2\mathrm{O}\right)$ is a compound because it is made up of two elements: Hydrogen and Oxygen in the fixed ratio of 2:1. These are mixed chemically.
3. It has a specific formula and is present in a specific mass proportion.