Question

which of the following doesnot follow the octate rule
A)BF3
B) CH4
C)NH3
D)H20​

Answer 1

question- which of the following does not follow the octate rule

A)BF3

B) CH4

C)NH3

D)H20

ans: BF3 does not follow the octate rule

Answer 2

Answer,

BF$_{3}$

​ Explanation,

$BF_{3}$  does not follow the octet rule because the central boron atom is surrounded by 6 electrons. 3 electrons are of B atom and the remaining 3 electrons are of 3 F atoms. To satisfy the octet rule, 8 electrons are required.

Boron lacks an electron pair. Hence, it also acts as Lewis acid.