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The residual product discharged by the hydrogen-oxygen cell is ____________

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The residual product discharged by the hydrogen-oxygen cell is ____________

(a) Hydrogen peroxide

(b) Alcohol

(c) Water

(d) Potassium permanganate

I had been asked this question in an interview for job.

This intriguing question comes from Fuel Cells topic in portion Corrosion, Electrolysis, Fuel Cells and Batteries of Engineering Chemistry II

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Correct answer is (c) Water

The explanation: The residual product discharged by the hydrogen-oxygen cell is water. It is formed by the oxidation reaction taking place at electrodes and combining the hydrogen and oxygen molecules.

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