Complete and balance the following:

(i) Potassium nitrate + sulphuric acid ⟶

(ii) Ferrous chloride + Ammonium hydroxide ⟶

(iii) Red lead + conc. HCl ⟶

(iv) Sodium thiosulphate + dilute Hydrochloric acid ⟶

(v) Copper with dil nitric acid ⟶

(i) Potassium nitrate + sulphuric acid ⟶ potassium bisulphate + nitric acid

$\text{KNO}_3 + \text{H}_2\text{SO}_4 [\text{conc.}]\xrightarrow{\lt 200 \degree\text{C}} \text{KHSO}$\text{4} + \text{HNO}_\bold{3}

(ii) Ferrous chloride + Ammonium hydroxide ⟶ ammonium chloride + ferrous hydroxide

$\text{FeCl}$2 + 2\text{NH}4\text{OH} \longrightarrow 2\text{NH}4\text{Cl} + \text{Fe(OH)}2

(iii) Red lead + conc. HCl ⟶ lead chloride + water + chlorine

$\text{Pb}$3\text{O}4 + 8\text{HCl (conc.)} \xrightarrow{\Delta} 3\text{PbCl}2 + 4\text{H}2\text{O} + \text{Cl}_2 ↑

(iv) Sodium thiosulphate + dilute Hydrochloric acid ⟶ sodium chloride + sulphur + sulphur dioxide + water

$\text{Na}$2\text{S}2\text{O}3 + 2\text{HCl (dil.)} \longrightarrow 2\text{NaCl} + \text{SO}2 + \text{S} + 2\text{H}_2\text{O}

(v) Copper with dil nitric acid ⟶ copper nitrate + water + nitrogen monoxide

$3\text{Cu} + 8\text{HNO}$3 \text{( dil.)} \longrightarrow 3\text{Cu(NO}3)2 + 4\text{H}2\text{O} + 2\text{NO}↑