Name the gas evolved when the following mixtures are heated:
(i) Calcium hydroxide and Ammonium Chloride
(ii) Sodium Nitrite and Ammonium Chloride
(i) Ammonia gas
2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3
(ii) Nitrogen gas
NH4Cl + NaNO2 ⟶ NaCl + NH4NO2
NH4NO2 ⟶ 2H2O + N2
