question_answer 1)

\[{{H}_{3}}P{{O}_{3}}\] can be represented by the structures I and II shown below. Can these structures be taken as the canonical forms of the resonance hybrid of \[{{H}_{3}}P{{O}_{3}}\]? If not, give reason for the same.  

Answer:

No, these cannot be taken as canonical forms because the positions of atoms have been changed.