(a) Define neutralization reaction with an example.

(b) Give a balanced equation for this reaction.

(c) Give three applications of neutralization reactions.

What do you understand by precipitation reaction? Explain with an example.

(a) What is a decomposition reaction ?

(b) Decomposition reactions can occur by (i) heat (ii) electricity and (iii) sunlight.
Give two balanced reactions for each.

State the type of reactions each of the following represent and balance the ones that are not balanced.

(a) Cl₂ + 2KBr ⟶ 2KCl + Br₂

(b) NaOH + HCl ⟶ NaCl + H₂O

(c) 2HgO ⟶ 2Hg + O₂ ↑

(d) Fe + CuSO₄ ⟶ FeSO₄ + Cu

(e) PbO₂ + SO₂ ⟶ PbSO₄

(f) 2KClO₃ ⟶ 2KCl + 3O₂ ↑

(g) 2H₂O₂ ⟶ 2H₂O + O₂ ↑

(h) KNO₃ + H₂SO₄ ⟶ HNO₃ + KHSO₄

(i) CuO + H₂ ⟶ Cu + H₂O

(j) CaCO₃ ⟶ CaO + CO₂ ↑

(k) NH₄Cl ⟶ NH₃ + HCl

(l) PbO + 2HNO₃ ⟶ Pb(NO₃)₂ + 2H₂O

(m) AgNO₃ + NaCl ⟶ AgCl ↓ + NaNO₃