Ammonia gas can be dried by

Conc. 2 4 4 10 H SO , P O and anhydrous 2 CaCl reacts with ammonia forming different products. The reactions are given below: 2 4 3 4 4 2 Conc. Ammonium sulphate 4 10 3 2 4 4 3 Ammonium phosphate 2 3 2 3 Complex 2 12 6 4 8 .8 H SO NH NH SO P O NH H O NH PO CaCl NH CaCl NH → → → Hence, none of them can be used for drying of Ammonia. We use quick lime (CaO) for drying of ammonia since it doesn’t react with it, but it can readily react with moisture. 2 2 CaO H O Ca OH → Hence, the correct option is (d).