Question

Which of the following are combination reactions?

(i) 2KClO₃ →Heat→2KCl + 3O₂
(ii) MgO + H₂O → Mg(OH)₂
(iii) 4Al + 3O₂ → 2Al₂O₃
(iv) Zn + FeSO₄ → ZnSO₄ + Fe

(A) (i) and (iii)       (B) (iii) and (iv)
(C) (ii) and (iv)     (D) (ii) and (iii)

Answer 1

(D) (ii) and (iii)

The reaction in which two or more reactants combine to form a single product is called combination reaction. Amongst given options, only in option (ii) and (iii), a single product is formed. Thus, these representm combination reactions.