Chemistry - Complete d-block Question with Solution | TestHub

The inability of${\mathrm{ns}}^2$electrons of the valence shell to participate in bonding on moving down the group in heavier$\mathrm{p}-$block elements is called inert pair effect.

As a result,$\mathrm{Pb}\left(\mathrm{II}\right)$is more stable than$\mathrm{Pb}\left(\mathrm{IV}\right)$

$\mathrm{Sn}\left(\mathrm{IV}\right)$is more stable than$\mathrm{Sn}\left(\mathrm{II}\right)$

$\therefore$$\mathrm{Pb}\left(\mathrm{IV}\right)$is easily reduced to$\mathrm{Pb}\left(\mathrm{II}\right)$.

$\therefore$$\mathrm{Pb}\left(\mathrm{IV}\right)$is an oxidizing agent.

$\mathrm{Sn}\left(\mathrm{II}\right)$is easily oxidized to$\mathrm{Sn}\left(\mathrm{IV}\right)$

$\therefore$$\mathrm{Sn}\left(\mathrm{II}\right)$is reducing agent.