Carboxylic Acid and Acid DerivativesHard

Question

Acidified K2Cr2O7 turns green when Na2SO3 is added to it. this is due to the formation of :-

Options

A.Cr2(SO4)3
B.CrO42-
C.Cr(SO4)2
D.CrSO4

Solution

K2Cr2O7 +3Na2SO3 + 4H2SO4  →  K2SO4 + 3Na2SO4 + Cr2(SO4)3 + 4H2O
                                                                                             Green

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