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Which of the following statements is correct when SO2 is passed through acidified K2Cr2O7 solution? 1. The solution turns blue 2. The solution is decolourised. 3. SO2 is reduced 4. Green Cr2(SO4)3 is formed

Answer» Which of the following statements is correct when SO2 is passed through acidified K2Cr2O7 solution? 1. The solution turns blue 2. The solution is decolourised. 3. SO2 is reduced 4. Green Cr2(SO4)3 is formed


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