Question

SO2 turns acidified K2Cr2O7 solution green oxidation state of green coloured ion is​

Answer 1

When SO2 is passed through the acidified K2Cr2O7 solution, the orange colour of potassium dichromate solution turns to clear green due to the formation of chromium sulphate. In this reaction, the oxidation state of Cr changes from +6 to +3. The appearance of green colour is due to the reduction of chromium metal...