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Q.

Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of 

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a

Cr2(SO3)3

b

CrSO4

c

Cr2(SO4)3

d

CrO42-

answer is B.

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Detailed Solution

K2Cr2O7+3Na2SO3+4H2SO4→3Na2SO4+K2SO4+Cr2SO43

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