1.

NH3 gas is dried over :(a) CaO (b) HNO3 (c) P2O5 (d) CuSO4

Answer»

(a) HNO3 and CuSO4 are not drying agents, while P2O5 reacts with NH3 . The moisture present in NH3 is removed by passing it through a tower packed with quicklime (CaO)



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