The blue colour produced on adding `H_2O_2` to acidified `K_2Cr_2O_7` is due to the formation of

The blue colour produced on adding hydrogen peroxide to acidified K_2Cr_2O_7 is due to the formation of

Acidified K_2Cr_2O_7 changes to green on reactions with

Acidified K_2Cr_2O_7 solution turns green by:

SO_(2) reduces acidified K_(2)Cr_(2)O_(7) to

When C_2O_5OH is heated with acidified K_2Cr_2O_7 it forms

On passing SO_2 in solution of K_2Cr_2O_7 , it turn green due to the formation of

(a) Name the blue compound formed in the reaction of H_(2)O_(2) with acidified K_(2)Cr_(2)O_(7) in ether? Give reaction. (b) What is the principle in the bleaching action of H_(2)O_(2) ?