Q32 / 160 · AP EAMCET 2020 (22 Sep Shift 2) · Chemistry

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

  • Correct answer
    A
    $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se} < \mathrm{H}_2 \mathrm{Te}$
  • B
    $\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$
  • C
    $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$
  • D
    $\mathrm{H}_2 \mathrm{O} < \mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}$

Solution

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

Hence, the correct answer is option: 'A'.

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