[" 5.Acidified solution of chromic acid on treatment with "],[H_(2)O_(2)" gives blue colour which is due to "]

Acidified solution of Chromic acid on treatment with H_2O_2 yields.

Acidified solution of chromic acid on treatment with hydrogen peroxide yields

Acidified solution of chromic acid on treatment with hydrogen peroxide yields

Acidified solution of K_(2)Cr_(2)O_(7) on treatment with H_(2)O_(2) yields :

Two species (A) and (B) exists in equilibrium at pH of about 4 and can be interconverted by changing the pH. Acidified solution of (B) is orange, and on adding H_(2)O_(2) it forms deep blue colour due to the formation of compound (C ), this blue colour fades away gradually. Further acidified solution (B) on reaction with NaCl gives organge red fumes due to the formation of (D ) . Identify (A), (B) , (C) & (D).