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JEE Main Chemistry question

ChemistryElectrochemistryJEE Main

A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has an emf of 2.7 V. If the standard reduction potential of the copper electrode is V, that of the magnesium electrode is

Answer: (B)

Solution

Mg lies above Cu in the electrochemical series, so Cu is the cathode and Mg is the anode:

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Question ID VK-143796