Acidity of diprotic acids in aqueous solutions increases in the order

Options

A. `H_(2)S lt H_(2)Se lt H_(2)Te`
B. `H_(2)Se lt H_(2)S lt H_(2)Te`
C. `H_(2)Te lt H_(2)S lt H_(2)Se`
D. `H_(2)Se lt H_(2)Te lt H_(2)S`

Answer

A

Explanation

The weakness of M-H bond with increase in size of M (where M=S, Se, Te) explains the acid character of hydrides. Since on moving down the group atomic size increases hence bond length increases and hence removal tendency of H also increases.