Give complete balanced reaction for the following: (a) Action of dilute and conc. nitric acid on tin. (b) Action of cold and conc. \(\mathrm{HCl}\) on lead (c) Action of sodium hydroxide on SuCl, (d) Action of water on \(\mathrm{Al}_{4} \mathrm{C}_{3}\)

a) \(4\mathrm{HNO}_3 + \mathrm{Sn} \rightarrow \mathrm{H}_2\mathrm{O} + \mathrm{SnO}_2 + 4\mathrm{NO}_2\) and \(6\mathrm{HNO}_3 + \mathrm{Sn} \rightarrow 4\mathrm{H}_2\mathrm{O} + \mathrm{SnO}_3 + 4\mathrm{NO}_2\)\n b) \(\mathrm{Pb} + 2\mathrm{HCl} \rightarrow \mathrm{PbCl}_2 + \mathrm{H}_2\) and \(\mathrm{Pb} + 4\mathrm{HCl} \rightarrow \mathrm{PbCl}_4 + 2\mathrm{H}_2\)\n c) \(\mathrm{SuCl} + 2\mathrm{NaOH} \rightarrow \mathrm{Na}_2\mathrm{Su} + \mathrm{H}_2\mathrm{O} + \mathrm{Cl}_2\) or if SuCl is a typo then \( \mathrm{CuCl}_2 + 2\mathrm{NaOH} \rightarrow \mathrm{Na}_2\mathrm{CuO}_2 + 2\mathrm{HCl}\)\n d) \(\mathrm{Al}_{4} \mathrm{C}_{3} + 12\mathrm{H}_2\mathrm{O} \rightarrow 4\mathrm{Al(OH)}_3 + 3\mathrm{CH}_4\)