1(d)
Write a balanced chemical equation for each of the following:
(i) Action of cold and dilute Nitric acid on Copper.
(ii) Reaction of Ammonia with heated copper oxide.
(iii) Preparation of methane from iodomethane.
(iv) Action of concentrated sulphuric acid on Sulphur.
(v) Laboratory preparation of ammonia from ammonium chloride.
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(i) 3Cu + 8HNO3 [dil.] ⟶ 3Cu(NO3)2 + 4H2O + 2NO [g]
(ii) 2NH3 + 3CuO ⟶ 3Cu + 3H2O + N2 [g]
(iii)
$\underset{\text{methyl iodide}}{\text{CH}_3\text{I}} + \underset{\text{nascent hydrogen}}{2\text{[H]}} \xrightarrow[\text{alcohol}]{\text{Zn/Cu couple}} \underset{\text{methane}}{\text{CH}_4} +\text{HI}$
(iv) S + 2H2SO4 (conc.) ⟶ 3SO2 + 2H2O
(v) 2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3