Question

Find the number of P-O bonds of identical length in hypophosphate ion.

Answer 1

$\text{Hypophosphate ion is}{P}_2{O}_6^{-4}$

$\begin{array}{c}\text{By exhibiting resonance the lengths of all}P-O\text{bonds}\\ \text{will be same of length in between the bond length of single}\\ \text{and double bond's}\text{.}\\ \text{As there are}6\text{bondings btween}P\&O\text{all}6\text{P-O bonds}\\ \text{are of same length.}\end{array}$