question_answer

A covalent molecule \[A{{B}_{3}}\] has pyramidal structure. The number of lone pair and bond pair of electron  in the molecule are respectively

A) \[2\] and \[2\]        

B) \[0\] and \[4\]

C) \[3\] and \[1\]         

D) \[1\] and \[3\]

Correct Answer: D

Solution :

The pyramidal structure of covalent molecule \[A{{B}_{3}}\] is as: No. of lone pair \[=1\] No. of bond pair \[=3\]