Chemistry - Complete d-block Question with Solution | TestHub

${\mathrm{H}}_3{\mathrm{PO}}_2$ is a good reducing agent as it contains two $\mathrm{P}-\mathrm{H}$ bonds and thus reduces $\begin{array}{rl}& {\mathrm{AgNO}}_3\text{ to Ag. }\\ & 4{\mathrm{AgNO}}_3+{\mathrm{H}}_3{\mathrm{PO}}_2+2{\mathrm{H}}_2\mathrm{O}⟶4\mathrm{Ag}\downarrow +{\mathrm{H}}_3{\mathrm{PO}}_4\\ & +4{\mathrm{HNO}}_3\\ & \end{array}$