Chemistry - Complete P-block Question with Solution | TestHub

To determine the ratio of sigma and pi bonds in pyrophosphoric acid, we first need to understand the molecular structure of the compound.

Pyrophosphoric acid has the chemical formula ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_7$. The molecule contains two phosphorus atoms, seven oxygen atoms, and four hydrogen atoms.

The structure of pyrophosphoric acid is

It contains total $12$ sigma bonds and $2$ pi bonds. So
$\frac{\text{ No. of }\mathrm{\sigma }\text{ bonds }}{\text{ No. of }\mathrm{\pi }\text{ bonds }}=\frac{12}{2}=6:1$