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JAMB Physics 2024 Paper

Question : 45

Total: 125

Solution:

Concept:

Faraday's second law of electrolysis relates the mass deposited to the chemical equivalent of the substance.

Explanation:

When the same quantity of electricity passes through different electrolytes, the mass

m

of a substance deposited is given by:

m \propto E

Here,

E

is the chemical equivalent (equivalent weight) of the substance.

The chemical equivalent is the ratio of the atomic weight to the valency, so the mass deposited depends directly on

E

, not on the molecular weight or atomic number alone.

Answer:

B. Chemical equivalent

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