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Question

Which of the following is not correct regrading the electrolytic preparation of H2O2?
  1. Lead is used as cathode
  2. Sulphuric acid undergoes oxidation.
  3. 50% H2SO4 is used
  4. Hydrogen is liberated at anode

A
50% H2SO4 is used
B
Hydrogen is liberated at anode
C
Sulphuric acid undergoes oxidation.
D
Lead is used as cathode
Solution
Verified by Toppr

H2O2 can be prepared by electrolysis of 50% H2SO4.
Here hydrogen is liberated at cathode
H2SO42H++SO42

At anode:
2HSO4H2S2O8+2e
H2S2O8+H2O2H2SO4+H2O2

At cathode:
2H++2eH2

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