question_answer

Which of the following molecule in its valence shell has three bond pairs of electrons and one lone pair of electrons?

A)  \[{{H}_{2}}O\]                    

B)  \[N{{H}_{3}}\]

C)  \[B{{F}_{3}}\]                     

D)  \[C{{O}_{2}}\]

Correct Answer: B

Solution :

\[N{{H}_{3}}\] molecule in its valence shell has three bond pairs of electrons and one lone pair of electrons. The shape of \[N{{H}_{3}}\] molecule is pyramidal due to the presence of one lone pair electron. It has \[s{{p}^{3}}\]hybridisation.