Write the equations .   (i) Acidified solution of `K_(2)Cr_(2)O_(7)` turns green when sodium
Channel: Doubtnut
Date: 03/05/2020

Write the equations .   (i) Acidified solution of `K_(2)Cr_(2)O_(7)` turns green when sodium sulphite is added to it.   (ii) Potassium ferricyanide is added to ferrous sulphate .   (iii) Silver  chloride is treated with aqueous sodium cyanide .   (iv) Zinc is exposed to moist air .