JAMB Chemistry 2023 Objective — Question 19

Question 19 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2023 Objective paper, with the correct answer and a full explanation.

In an electrochemical cell, polarisation is caused by

A. Oxygen
B. HydrogenCorrect
C. Chlorine
D. Tetraoxosulphate(vi) acid

Explanation

Hydrogen bubbles form on the anode surface during electrolysis, increasing cell resistance and reducing EMF. This is polarisation, prevented by depolarisers like MnO₂.

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