Chemistry - Nomenclature Question with Solution | TestHub

As on moving down the group bond length increases so liberation tendency of${\mathrm{H}}^{+}$will be more as cleavage of M-H get easier, so acidic nature decreases.
${\mathrm{H}}_2\mathrm{S}<{\mathrm{H}}_2\text{Se}<{\mathrm{H}}_2\text{Te}$