Chemistry - Complete P-block Question with Solution | TestHub

The oxyacid ${\left({\mathrm{HPO}}_3\right)}_{\mathrm{n}}$ has different structures based on the value of n. If n=3, 

The oxyacid ${\mathrm{H}}_2{\mathrm{P}}_2{\mathrm{O}}_5$ has the following structure.

The structures of the ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$ and ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_7$ are

Oxyacid having $\mathrm{P}-\mathrm{H}$ bond can reduce ${\mathrm{AgNO}}_3$ to
$\mathrm{Ag}$. Hence, ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_5$ can create silver mirror with silver nitrate.