`H_3 PO_3` can be represented by structures 1 and 2 shown below. Can these two structures be taken as the canonical forms of the resonance hybrid representing `H_3 PO_3 ?` If not, give reasons for the same.

Explanation

In the given structures (1) and (2), the position of atoms (hydrogen atoms) is not the same. Due to change in the position of atoms, they can not be regarded as the canonical forms of the resonance hybrid of `H_3 PO_3`.