Give an example of:

(a) Single displacement reaction

(b) Double displacement reaction

(c) Photochemical reaction

(d) Thermal decomposition reaction

(e) Electrolytic decomposition reaction

(f) Combination reaction between two compounds ?

(a) Single displacement reaction

CuSO₄ + Zn ⟶ Cu + ZnSO₄

(b) Double displacement reaction

BaCl₂ (aq) + H₂SO₄ (aq) ⟶ BaSO₄ (s) + 2HCl (aq)

(c) Photochemical reaction

2AgNO₃ $\xrightarrow{\text{sunlight}}$ 2Ag + 2NO₂ ↑ + O₂ ↑

(d) Thermal decomposition reaction

2HgO (s) $\xrightarrow{\Delta}$ 2Hg (l) + O₂ (g)

(e) Electrolytic decomposition reaction

2H₂O $\xrightarrow[\text{current}]{\text{electric}}$ 2H₂ + O₂ ↑

(f) Combination reaction between two compounds ?

NH₃ + HCl ⟶ NH₄Cl