Question

Which one of the following compounds is not a salt?
1. Ca(ClO4)2
2. Fe(NO3)3
3. Cr(OH)3
4. Na2SO3
5. KMnO4

Answer 1

Salts are made up of
a. a cation other than H ion.
b. an anion other than hydroxide.

Answer 2

aluminium oxide

Answer 3

aluminum cockside