Question
$H _3 PO _3$ 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.
✓
Answer
These structures of $H _3 PO _3$ can't be considered as cannonical form because in this arrangement of atoms is different while according to resonance in cannonical structures only the arrangement of electrons is different.
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