(xiii) An acidic gas which reacts with a basic gas liberating neutral gas. (xi) Salt used to clean metal surface before soldering, tinning, etc. (viii) Basic gas that is used as a refrigerant. (vii) Products obtained by treating with excess chlorine. (vi) Indicator that turns deep pink when treated with NH 4OH. (v) Liquid when added to metallic nitride that yield ammonia.

(iii) Products obtained by burning ammonia in oxygen. (ii) Solid obtained by passing ammonia over heated copper oxide (i) Gas obtained by treating chlorine in excess of ammonia. Phosphorus pentoxide reacts with ammonia to form ammonium phosphate.Īnhydrous calcium chloride combines with ammonia to form addition compound. H 2SO 4 reacts with ammonia to form ammonium sulphate. (iii) The substance used for drying ammonia gas is quicklime(calcium oxide).Concentrated sulphuric acid, anhydrous calcium chloride and phosphorus pentoxide cannot be used for drying ammonia gas because ammonia being basic reacts with them, and the following reaction takes placeĬonc. (ii) Ammonia gas is collected in an inverted dry gas jar by the downward displacement of air. The reactants are heated to get the products. Reactants should be dry and in grounded state. (i) Ammonium chloride is heated with calcium hydroxide (an alkali), in ratio of 2: 3 by weight, to produce ammonia. (iii) Name the substance used for drying ammonia gas? Why cannot substances such as conc.H 2SO 4, anhydrous calcium chloride and phosphorus pentoxide be used for drying (ii) How is gas collected in the gas jar? (i) How is ammonia gas prepared in laboratory starting from NH 4Cl? State the conditions and balanced equation for the preparation. (b) A saturated solution of ammonia in water is called liquor ammonia Fortis.ģ. It is very dilute solution of ammonium hydroxide (NH 4OH). (ii) Liquor ammonia - It is saturated solution of ammonia in water. (a) (i) Liquid ammonia - Compressed ammonia gas at 6 atmospheric pressure. (a) Give the formula of (i) Liquid ammonia (ii) Liquor ammonia In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and ammonium sulphate.Ģ. In free state, it is formed in traces amount by decaying urine and other organic matter. Ammonia is found both in free state and in combined state.

Dilute ammonia solution preparation