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Q.

When SO2 is passed through acidified K2Cr2O7 solution

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a

The solution turns blue

b

SO2 is reduced

c

The solution is decolourised

d

Green Cr2(SO4)3 is formed 

answer is D.

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Detailed Solution

K2Cr2O7+H2SO4+3SO2K2SO4+Cr2(SO4)3Green+3H2O

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