On shaking H_2O_2 with acidified potassium di | vedclass

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(C) When $H_2O_2$ is added to an acidified solution of potassium dichromate $(K_2Cr_2O_7)$ in the presence of ether,a deep blue color is observed in t

Vedclass · Accepted Answer

Blue

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(C) When $H_2O_2$ is added to an acidified solution of potassium dichromate $(K_2Cr_2O_7)$ in the presence of ether,a deep blue color is observed in the ethereal layer.This is due to the formation of chromium pentoxide $(CrO_5)$,which is soluble in ether.The chemical reaction is:$K_2Cr_2O_7 + H_2SO_4 + 4H_2O_2 	o K_2SO_4 + 2CrO_5 (	ext{Blue}) + 5H_2O$

On shaking $H_2O_2$ with acidified potassium dichromate and ether,the ethereal layer becomes:

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