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Q.

On passing SO2 gas through an acidified solution of K2Cr2O7

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a

the solution gets decolourised

b

the solution becomes blue

c

SO2 is reduced

d

green Cr2 (SO4)3 is obtained

answer is D.

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Detailed Solution

O2 passing SO2  gas through an acidified solution of K2Cr2O7, green Cr2 (SO4)3 is obtained.            K2Cr2O7+3SO2+H2SO4⟶K2SO4+Cr2SO43+H2O( Green )
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