question_answer

Which of the following species contains three bond pairs and one lone pair around the central atom? [AIPMT (S) 2012]

A)  \[{{H}_{2}}O\]           

B)  \[B{{F}_{3}}\]

C)  \[NH_{2}^{-}\]           

D)       \[PC{{l}_{3}}\]

Correct Answer: D

Solution :

[a] \[{{H}_{2}}O\Rightarrow \]

[bp = bond pairs and Ip = lone pair]

[b]

[c]

[d]

Thus, in PCl3, the central atom P ha:, three bond pairs and one lone pair.