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Wednesday, March 16, 2022

When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to formation of....?

(A) CrO3
(B) Cr2O3
(C) CrO5
(D) CrO4^-2
Solution:
When acidified solution of  K2Cr2O7 are shaken with H2O2 in presence of ether , the ethereal layer turn blue due to the formation of CrO5 ( deep blue in colour).
Hence option (C) is correct.

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