Question

Which among the following is an electron deficient compound?

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

Answer 1

Answer: (C)

$B{H}_3$ has $6$ electrons in the valence shell of $B$-atom. As it has incomplete octet, so this is an electron deficient molecule