Question

$PC{{l}_{5}}$ is possible but $NC{{l}_{5}}$ does not exist

• A. in $N,\,\,d-$ sub-shell is absent
• B. ionization energy of $N$ is very high
• C. it does not like $Cl$
• D. none of the above

Answer 1

Answer: (A)

in $N,\,\,d-$ sub-shell is absent

Answer 2

Nitrogen cannot form pentahalides because it cannot expand its octet due to non-availability of $d-$ orbitals.