Arrhenius Theory of Acids, Bases

Q.

Is ${\mathrm{H}}^{+}$ an acid or base?

Q.

Acids contain _______ ions and bases contain ________ ions.

Q.

Identify Arrhenius acids and bases among the following:
$\begin{array}{cc}1.NaCl& 2.HCl\\ 3.Cu{\left(OH\right)}_2& 4.NaOH\\ 5.H_{2}S{O}_4& 6.HN{O}_3\\ 7.KOH& \end{array}$

1. 4, 6 and 7 are acids and the rest are bases

2. 2, 5 and 6 are acids and 3, 4 and 7 are bases

3. 1, 2 and 5 are acids and 3, 4 and 7 are bases

4. 2, 3 and 5 are acids and 1, 4, 6 are bases