Question

Which of the following is incorrectly paired?

• A. $HN{O}_3$ - acid
• B. $Mg(OH{)}_2$ - base
• C. $N{H}_3$ - acid
• D. $N{H}_{4}OH$ - base

Answer 1

The correct option is C $N{H}_3$ - acid

$HN{O}_3$ is an acid as it can donate protons in water. $Mg(OH{)}_2$ and $N{H}_{4}OH$ are bases because they can give $O{H}^{-}$ ions in water.
$N{H}_3$ is a base because it can accept protons in water. Hence, $N{H}_3$ is wrongly paired.