when so2 is passed through acidified k2Cr2
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When sulfur dioxide (SO2) is passed through acidified (in the presence of sulphuric acid i.e., H2SO4) potassium dichromate solution (K2Cr2O7), potassium sulfate (K2SO4) and chromium sulphate (Cr2(SO4)3) are formed along with water molecules.
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