1.

Hydrogen peroxide is obtained by the electrolysis of _________.

Answer»

water
sulphuric acid
hydrochloric acid
fused SODIUM peroxide

Solution :`H_(2)O_(2)` is obtained by the ELECTROLYSIS of a cold 50% solution of `H_(2)SO_(4)`.
`2H_(2)SO_(4)to 2H^(+)+2HSO_(4)^(-)`
`2HSO_(4)^(-)overset("Electrolysis")rarr UNDERSET(2HSO_(4(aq))^(-)+2H_((aq))^(+)+H_(2)O_(2(aq)))underset(darr" Hydrolysis")underset("Peroxodisulphate")(HO_(3)SOOSO_(3)H_((aq)))`


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