Question

which property of sulphur dioxide is shown when acidified potassium dichromate turns green​

Answer 1

Explanation:

Colour changes: K+ in K2Cr207 is a colourless ion, and dichromate (Cr2O72-) is an orange solution. SO2 is a colourless gas, so the intial solution is orange. The solution turns green because the Cr2O72- is reduced to Cr3+ which is a green ion- so the solution turns from orange to green.