Question

In which of the following pπ-dπ bonding is possible?

(a) CO₃^2-

(b) PO₄^3-

(c) NO₃^-

(d) NO₂^-

Answer 1

Correct option  (b) PO₄^3-

Explanation:

Carbon, oxygen and nitrogen atoms do not have any d-orbital available. Therefore, in CO₃^2- , NO₂^- and NO₃^- there is no possibility of pπ -dπ type to bonding.

In PO₄^3-, phosphorus atom has vacant d-orbital available which is used to form pπ-dπ bonding with p-orbital of oxygen atom.