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Question

When H2O2is added to an acidified solution of K2Cr2O7:

A
solution turns green due to formation of Cr2O3.
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B
solution turns yellow due to formation of K2CrO4.
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C
a deep blue-violet colored compound CrO(O2)2 is formed.
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D
solution gives green ppt. of Cr(OH)3.
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Solution

The correct option is C a deep blue-violet colored compound CrO(O2)2 is formed.
A deep blue layer is formed due to CrO(O2)2 is present in product.

Cr2O27+2H++4H2O22CrO(O2)2+5H2O

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