Chemistry
Give balanced equations for the following conversions :
(a) Ammonia to nitrogen using an acidic gas.
(b) Ammonia to brown gas.
(c) Ammonia to nitrogen trichloride
(d) Ammonia solution to an amphoteric hydroxide
(e) A nitride of a trivalent metal to ammonia
(f) Lead oxide to lead
Ammonia
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Answer
(a) Ammonia to nitrogen using an acidic gas :
8NH3 [excess] + 3Cl2 ⟶ 6NH4Cl + N2
(b) Ammonia to brown gas:
2NO + O2 ⟶ 2NO2 [brown gas]
(c) Ammonia to nitrogen trichloride
NH3 + 3Cl2 [excess] ⟶ 3HCl + NCl3
(d) Ammonia solution to an amphoteric hydroxide :
AlCl3 + 3NH4OH ⟶ 3NH4Cl + Al(OH)3
(e) A nitride of a trivalent metal to ammonia:
AlN + 3H2O ⟶ Al(OH)3 + NH3 ↑
(f) Lead oxide to lead
2NH3 + 3PbO ⟶ 3Pb + 3H2O + N2 [g]
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State relevant observation for the following:
(a) Ammonia gas is passed over heated copper (II) oxide.
(b) In the absence of catalyst, ammonia is burnt in an atmosphere of oxygen.
(c) Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate.
(d) Water is added to the product formed, when Al is burnt in a jar of nitrogen gas.
(e) Excess of chlorine gas is reacted with ammonia gas.
(f) Calcium hydroxide is heated with ammonium chloride crystals.