Question

Under which category of mixture will you classify alloys and why first whether a solution is always a liquid second can a solution be heterogeneous

Answer 1

Alloys are homogeneous mixture.

Your second answer, no a solution is not only of liquid. It may be solid to solid such as alloys or gas to liquid such as carbon dioxide to water to form carbonic acid or some time solution is gas to gas such as aur is the mixture of many gases.

No, solution can not be heterogeneous because in heterogeneous mixture solute particles are not uniformly dissolved in mixture.