Which of the following are combination reactions?
(i) \(2KClO_3 \xrightarrow{\text{Heat}} 2KCl + 3O_2\)
(ii) \(MgO + H_2O → Mg(OH)_2\)
(iii) \(4Al + 3O_2 → 2Al_2O_3\)
(iv) \(Zn + FeSO_4 → ZnSO_4 + Fe\)
(i) and (iii)
(iii) and (iv)
(ii) and (iv)
(ii) and (iii)
(ii) & (iii) form single products from reactants (combination). (i) is decomposition; (iv) is displacement.