Answer the following:
$(a)$ Under which category of mixtures will you classify alloys and why?
$(b)$ $A$ solution is always a liquid. Comment.
$(c)$ Can a solution be heterogeneous?

(N/A) Alloys are classified as homogeneous mixtures because they have a uniform composition throughout their entire mass.
$(b)$ No,this statement is incorrect. Solutions can exist in different states of matter,including solid solutions (e.g.,brass,which is an alloy of copper and zinc) and gaseous solutions (e.g.,air,which is a mixture of various gases).
$(c)$ No,by definition,a solution is a homogeneous mixture of two or more substances. If a mixture is heterogeneous,it is not classified as a solution.