Question

Consider the following:
Statement I:
\( \mathrm{H_2O_2} \) acts as an oxidising as well as reducing agent in both acidic and basic media.
Statement II:
10V \( \mathrm{H_2O_2} \) sample means it contains 6% (w/v) \( \mathrm{H_2O_2} \)

• A. Both statement-I and statement-II are correct
• B. Statement-I is correct, but statement-II is not correct
• C. Statement-I is not correct, but statement-II is correct
• D. Both statement-I and statement-II are not correct

Hint:

Hydrogen peroxide shows both oxidizing and reducing properties depending on the medium. "Volume strength" refers to the volume of oxygen gas released at STP, not directly the % concentration.

Answer 1

The Correct Option is B

Step 1: Analyze Statement I
Hydrogen peroxide \( (\mathrm{H_2O_2}) \) is amphoteric in redox behavior: - It acts as an **oxidising agent** in acidic medium (e.g., liberating \( \mathrm{O_2} \) from iodide). - It also acts as a **reducing agent** (e.g., reducing \( \mathrm{KMnO_4} \) or \( \mathrm{Cl_2} \)) in basic medium.
Thus, Statement I is **correct**. Step 2: Analyze Statement II
"10 Volume" hydrogen peroxide implies that 1 mL of solution gives 10 mL of \( \mathrm{O_2} \) at STP. This corresponds to **approximately 3% (w/v)** solution, **not 6%** as mentioned.
Thus, Statement II is **incorrect**. Conclusion:
Only Statement I is correct.