1.

Acidified solution of Chromic acid on treatment with H_2O_2yields.

Answer»

`CrO_3+H_2O+O_2`
`Cr_2O_2 +H_2O+O_2`
`CrO_5 +H_2O+K_2SO_4`
`H_2Cr_2O_7 +H_2O +O_2`

ANSWER :C


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