What is contect process, fresch process, uses of ammonia and properties of ammonia.
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Ammonia gas is lighter than air, necessitating its collection by the downward displacement of air. Because it is highly soluble in water it cannot be collected over it. Passing ammonia gas over quicklime (CaO) dries it. Being a basic gas, ammonia cannot be dried by passing it through concentrated sulphuric acid or phosphorus pentoxide (P2O5), as it reacts with them to form ammonium sulphate or ammonium phosphate respectively.
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