The correct order of acidic character of group- 16 hydrides is

The correct order of acidic character of group- 16 hydrides is
  1. $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se} < \mathrm{H}_2 \mathrm{Te}$
  2. $\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$
  3. $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$
  4. $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$

Solution

Acidic character increases down the group as the $M-\mathrm{H}$ bond strength decreases. Hence, the correct option is (1).

Asked in: AP EAMCET 2020 (22 Sep Shift 2)

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