WAEC Physics 2024 Objective — Question 29

Question 29 of 50 from the West African Examinations Council (WAEC) Physics 2024 Objective paper, with the correct answer and a full explanation.

29. The depolarizing agent in a Leclanche cell is A.

A. powdered carbon.
B. manganese (IV) oxide.Correct
C. carbon rod.
D. ammonium chloride.

Explanation

The depolarizing agent in a Leclanche cell is manganese dioxide (MnO2). It is used to prevent build-up of hydrogen gas at the cathode, acting as a depolarizer by reacting with hydrogen gas to form water.

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