For which of the following elements it is difficult to disproportionate in +3 oxidation state?
For which of the following elements it is difficult to disproportionate in +3 oxidation state?
$\mathrm{N}$
As
$\mathrm{Sb}$
$\mathrm{Bi}$
Solution
In nitrogen family, due to inert pair effect as the tendency to show +3 oxidation state increases down the group from As to $\mathrm{Bi}$, tendency to disproportionate decreases.