Question

In which of the following molecules, bonding is not taking place in excited state:

• A. $C{H}_4$
• B. $B{F}_3$
• C. $I{F}_7$
• D. $PC{l}_3$

Answer 1

The correct option is D $PC{l}_3$

In the case of $PC{l}_3$, only outer electrons are going to be shown for simplicity.

• Each atom in $PC{l}_3$ has $2,8$ electrons in inner layers of orbit.
• Every atom has a noble gas structure.

So, in $PC{l}_3$ bonding is not taking place in excited state.