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What is the preferred electrode when it is not allowed to take part in the chemical reaction?

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in Chemistry – Class 12 by (188k points)
What is the preferred electrode when it is not allowed to take part in the chemical reaction?

(a) Gold

(b) Silver

(c) Copper

(d) Graphite

I have been asked this question at a job interview.

The question is from Electrolytic Cells and Electrolysis topic in section Electrochemistry of Chemistry – Class 12

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The correct answer is (d) Graphite

Easy explanation: Electrodes which do not take part in the chemical reaction during electrolysis are known as inert electrodes. Gold, silver and graphite do not take part in the process, but graphite is preferred because gold and silver electrodes are expensive.

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