`HCl, KOH, Ca(OH)_3, H_2SO_4, ZnCl_2`
Given are the chemical formula of certain substances.
a) Which among these are alkalies?
b) On what basis are they treated as alkalies?
c) Which among these are neither alkalies nor acids?
d) Name the product formed when the common factor of acid and alkali combine with each other.

Explanation

a) .KOH, Ca(OH)_2.
b) Common factor of alkali is .OH^-. ions.
c) .ZnCl_2.
d) .H_2O.