State the properties of compounds.

Is air a mixture or a compound ? Give three reasons.

Give two reasons to support that water is a compound and not a mixture.

'Compounds are homogeneous but mixture may be homogeneous or heterogeneous'. Explain this statement with example.

Explain why, a solution of salt in water is considered as a mixture and not compound?

Classify the following into elements, compounds and mixtures

air, gold, diamond, marble, comman salt, chalk, sea water, petroleum, sand, brass.

Differentiate between the physical properties of Metals and non-metals.