2(ii)
Write balanced chemical equations for the following:
(a) Chlorination of chloroform in the presence of diffused sunlight.
(b) Hydrated aluminium oxide is treated with caustic soda.
(c) Zinc oxide is treated with caustic alkali.
(d) Copper reacts with cold dilute nitric acid.
(e) Laboratory preparation of nitric acid using sodium nitrate.
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(a) CHCl3 + Cl2 $\xrightarrow{\text{diffused sunlight}}$ CCl4 + HCl
(b) Al2O3.2H2O + 2NaOH ⟶ 2NaAlO2 + 3H2O
(c) ZnO + 2NaOH ⟶ Na2ZnO2 + H2O
(d) 3Cu + 8HNO3 (dilute) ⟶ 3Cu(NO3)2 + 4H2O + 2NO
(e) NaNO3 + H2SO4 $\xrightarrow{\text{below 200°C}}$ NaHSO4 + HNO3