Neet Solved Paper 2013 Question 28
Question: Which of the following is electron deficient?
Options:
A) $ {{(CH _3)}_2} $
B) $ {{(SiH _3)}_2} $
C) $ {{(BH _3)}_2} $
D) $ PH _3 $
Show Answer
Answer:
Correct Answer: C
Solution:
Boron is an element of 13 group and contains three electrons in its valence shell.
When its compound $ BH _3 $ dime rises, each boron atom carry only $ 6{e^{-}}, $
that is their octet is incomplete. Hence, $ {{(BH _3)}_2} $ is an electron deficient compound.
In all other given molecules octet of central atom is complete.
