1.

When H_(2)O_(2) is added to ice cold solution of acidified potassium dichromatic in ether and the contents are shaken and allowed to stand.

Answer»

a blue COLOUR is obtained in ether due to formation of `Cr_(2)(SO_(4))_(3)`
a blue colour is obtained in ether due to formation of `CrO_(5)`
a blue colour is obtained in ether due to formation of `CrO_(3)`
chromyl chloride is formed

Solution :`Cr_(2)O_(7)^(2-)+2H^(+)4H_(2)O_(2)rarr2CrO_(5)+5H_(2)O`


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