Ncert Exercises & Solutions

4.12 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.

ncert solutions for class 11 chemistry chapter 4

According to experimental findings, all carbon to oxygen bonds in

{CO}_{3}^{2 -}

are equivalent.
Hence, it is inadequate to represent

{CO}_{3}^{2 -}

by a single Lewis structure having two single bonds and one double bond.
Therefore, carbonate ion is described as a resonance hybrid of the following structures:

class 11 chemistry ncert solutions chapter 4

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