Q40 / 180 · AIIMS 2015 · Chemistry

Assertion: $\mathrm{Sb}_2 \mathrm{~S}_3$ is not soluble in yellow ammonium sulphide. Reason : The common ion effect due to $S^{2-}$ ions reduces the solubility of $\mathrm{Sb}_2 \mathrm{~S}_3$.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Ifboth assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • Correct answer
    D
    If both assertion and reason are false.

Solution

$\mathrm{Sb}_2 \mathrm{~S}_3$ is soluble in yellow ammonium sulphide. $$ \mathrm{Sb}_2 \mathrm{~S}_3+3\left(\mathrm{NH}_4\right)_2 \mathrm{~S} \rightarrow 2\left(\mathrm{NH}_4\right)_3 \mathrm{SbS}_3 $$

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

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