Question

Which of the following has maximum complex forming ability with a given metal ion ?

• A. $N{H}_3$
• B. $P{H}_3$
• C. $Bi{H}_3$
• D. $Sb{H}_3$

Answer 1

Answer: (A)

The lone pair electron density on N in $N{H}_3$ is the largest, hence it will have the maximum complex forming ability.