In the laboratory H_(2)O_(2) is prepared by the action of:

1.	In the laboratory H_(2)O_(2) is prepared by the action of:
Answer» cold DILUTE `H_(2)SO_(4)` on HYDRATED `BaO_(2)` dil. HCl on `MnO_(2)` cold `H_(2)SO_(4)` on `MnO_(2)` aqueous alkali on `Na_(2)O_(3)` Solution :`BaO_(2)+dilH_(2)SO_(4)rarrH_(2)O_(3)+BaSO_(4)downarrow`

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