Question

$P{H}_3$ is a weaker base than $N{H}_3$.

• A. True
• B. False

Answer 1

The correct option is A True

$N{H}_3$ is a base due to the presence of a lone pair of electrons on the nitrogen atom which available for donation. The size of P atom is larger than N atom, hence the lone pair of electrons on P atom are less readily available for donation as compared to N atom, making $P{H}_3$ less basic than $N{H}_3$.