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In polarographic cell when potential is applied, oxygen is reduced at __________ when KCl is present.

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In polarographic cell when potential is applied, oxygen is reduced at __________ when KCl is present.

(a) Anode

(b) Cathode

(c) Electrolyte

(d) Both the electrode

I got this question in my homework.

I need to ask this question from Electrochemical Methods for Oxygen Analysis topic in portion Industrial Gas Analysers of Analytical Instrumentation

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Correct choice is (b) Cathode

Explanation: In polarographic cell when potential is applied, oxygen is reduced at the cathode. Reduction reactions take place at the cathode. KCl is the electrolyte.

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