Question

Which of the following molecule deviates from octet rule with respect

To central atom

a)PCl3 b)H2S c)NH3 d)XeF4​

Answer 1

Answer:

d)XeF4

Explanation:

In PCl

3

, P in atomic state has 5 valence electrons. 3 were shared in PCl

3

and now P have 8 electrons in valence shell.

In H

2

S, Sulphur needs 2 electrons to complete octet. So, it shared 2 electrons with two hydrogen atoms.

NH

3

is same as in PCl

3

.

In case of XeF

4

, Xe already have stable octet configuration. On sharing its electrons with 4 fluorine atoms, it exceeds octet.