Write the balanced chemical equation for the following and identify the type of reaction in each case.

(a) Potassium bromide (aq) + Barium iodide (aq) ⟶ Potassium iodide (aq) + Barium bromide (s)

(b) Zinc carbonate (s) ⟶ Zinc oxide (s) + Carbon dioxide (g)

(c) Hydrogen (g) + Chlorine(g) ⟶ Hydrogen chloride (g)

(d) Magnesium (s) + Hydrochloric acid (aq) ⟶ Magnesium chloride (aq) + Hydrogen(g)

(a) 2KBr (aq) + BaI₂ (aq) ⟶ 2KI (aq) + BaBr₂ (s)
Type — Double displacement reaction

(b) ZnCO₃ (s) ⟶ ZnO (s) + CO₂ (g)
Type — Decomposition reaction

(c) H₂ (g) + Cl₂ (g) ⟶ 2HCl (g)
Type — Combination reaction

(d) Mg (s) + 2HCl (aq) ⟶ MgCl₂ (aq) + H₂ (g)
Type — Displacement reaction