JEE Advanced 2024 Chemistry question

An aqueous solution of hydrazine () is electrochemically oxidized by , thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is . Choose the correct statement(s) about the above process

(A) ions react with at the anode to form and water, releasing 4 electrons to the anode.Correct
(B)At the cathode, breaks to and nascent hydrogen released at the electrode reacts with oxygen to form water.
(C)At the cathode, molecular oxygen gets converted to .Correct
(D)Oxides of nitrogen are major by-products of the electrochemical process.

Answer: (A),(C)

Solution

In the alkaline hydrazine–oxygen fuel cell, oxidation occurs at the anode: – so (A) is correct. Reduction occurs at the cathode: – so

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Question ID VK-034253