Question

Given below are two statements:
Statement I: \( \text{S}_8 \) solid undergoes disproportionation reaction under alkaline conditions to form \( \text{S}^{2-} \) and \( \text{S}_2\text{O}_3^{2-} \). 
Statement II: \( \text{ClO}_4^- \) can undergo disproportionation reaction under acidic condition.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Statement I is correct but statement II is incorrect.
• B. Statement I is incorrect but statement II is correct
• C. Both statement I and statement II are incorrect
• D. Both statement I and statement II are correct

Answer 1

The Correct Option is A

Statement I is correct because \( S_8 \) can indeed undergo disproportionation in alkaline medium:

\[ S_8 + 12 \text{OH}^- \rightarrow 4 S^{2-} + 2 S_2O_3^{2-} + 6 H_2O. \]

Statement II is incorrect because \( \text{ClO}_4^- \) cannot undergo disproportionation as chlorine is already in its highest oxidation state.