State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.

List five characteristics by which compounds can be distinguished from mixtures.

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

You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound?

Name a non-metal:

(a) which is lustrous

(b) which is required for combustion

(c) whose one of the allotropic forms is a good conductor of electricity. Name the allotrope

(d) other than carbon which shows allotropy

(e) which is known to form the largest number of compounds