JEE Main Chemistry question

Which of the following is not correct regarding the electrolytic preparation of HO? [DCE 2008]

(A)Lead is used as cathode
(B)50% HSO is used
(C)Hydrogen is liberated at anodeCorrect
(D)Sulphuric acid undergoes oxidation

Answer: (C)

Solution

In the electrolytic method, 50% HSO is electrolysed at low temperature between a bright platinum anode and a lead cathode (A, B both correct); at the anode, is oxidised to peroxydisulphuric acid, 4^-$ →

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Question ID VK-137188