The P Block Elements - Result Question 42
####43. Acidity of diprotic acids in aqueous solutions increases in the order :
(a) $H_2 S<H_2 Se<H_2 Te$
[2014]
(b) $H_2 Se<2 H_2 S<H_2^{2} Te$
(c) $H_2 Te<H_2 S<H_2 Se$
(d) $H_2 Se<H_2 Te<H_2 S$
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Solution:
- (a) The weakning of $M-H$ bond with increase in size of $M$ (where $M=S, Se, Te$ ) explains the acid character of hydrides.
On moving down the group, atomic size increases hence, bond length increases and hence, removal tendency of $H$ also increases.
