question_answer

Which one of the following is electron-deficient molecule according to the octet rule?

A) \[C{{H}_{4}}\]                   

B) \[{{H}_{3}}N:B{{H}_{3}}\]

C) \[Al{{H}_{3}}\]                  

D) \[Ge{{H}_{4}}\]

Correct Answer: C

Solution :

\[Al{{H}_{3}}\]has 3 center 2 electron bond So, Al--- H bond is a half-bond. So, around Al there are only 6 electrons. So it is electron deficient.