JEE PYQ: Hydrogen Question 4
Question 4 - 2021 (18 Mar Shift 2)
In basic medium, $\text{H}_2\text{O}_2$ exhibits which of the following reactions? (A) $\text{Mn}^{2+} \to \text{Mn}^{4+}$ (B) $\text{I}_2 \to \text{I}^-$ (C) $\text{PbS} \to \text{PbSO}_4$
Choose the most appropriate answer from the options given below:
(a) (A), (C) only (b) (A) only (c) (B) only (d) (A), (B) only
Show Answer
Answer: (d)
Solution
In basic medium, oxidising action: $\text{Mn}^{2+} + \text{H}_2\text{O}_2 \to \text{Mn}^{4+} + 2\text{OH}^-$. Reducing action: $\text{I}_2 + \text{H}_2\text{O}_2 + 2\text{OH}^- \to 2\text{I}^- + 2\text{H}_2\text{O} + \text{O}_2$. Reaction (C) occurs in acidic medium.
BETA
