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K2Cr2O7 on reaction with H2O2 in acidi...

`K_2Cr_2O_7` on reaction with `H_2O_2` in acidic medium gives

A

blue colour, `CrO_2`

B

green colour, `Cr_2O_3`

C

orange colour, `CrO_3`

D

blue colour, `CrO_5`

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