Question

Photographic paper is developed with alkaline hydroquinone. Select correct statement.

• A. Hydroquinone is the oxidant
• B. Ag\(^+\) is the oxidant
• C. Br\(^-\) is the oxidant
• D. Ag\(^+\) is the reductant

Hint:

Oxidant = gets reduced (gains electrons). Reductant = gets oxidised (loses electrons).

Answer 1

The Correct Option is B

Step 1: Concept:
In photographic development, exposed AgBr is reduced to Ag metal. Hydroquinone is the reducing agent.
Step 2: Explanation:
Ag\(^+\) (in AgBr) + e\(^-\) \(\rightarrow\) Ag(s) (reduction). Ag\(^+\) accepts electrons \(\Rightarrow\) oxidant.
Hydroquinone is oxidised to quinone, donates electrons \(\Rightarrow\) reductant.
Step 3: Conclusion:
Thus, Ag\(^+\) is the oxidant.