Question

When so22 gas is passed through acidfied solution of potassium dichromate;the clour of the solution changes to?

Answer 1

The orange colour of solution changes to clean green.

Answer 2

green Cr2(SO4)3 is formed When SO2 is bubbled through acidified solution of K2Cr2O7, the orange colour of K2Cr2O7 solution turns to cleangreen due to formation of chromium sulphate.