Metal X was placed in lead nitrate solution. A thin layer of lead metal deposits on metal X. Which is more reactive metal X or lead ? State the type of reaction and give an example of this type.

Balance these reactions and state what type of reactions they are:

(a) NaNO₃ ⟶ NaNO₂ + O₂

(b) AgNO₃ + Zn ⟶ Zn(NO₃)₂ + Ag

(c) Fe + HCl ⟶ FeCl₂ + H₂

(d) AgNO₃ ⟶ Ag + NO₂ + O₂

(e) NaBr + Cl₂ ⟶ NaCl + Br₂

(f) PbO + C ⟶ Pb + CO₂

(g) KClO₃ ⟶ KCl + O₂

(h) AgNO₃ + HCl ⟶ AgCl ↓ + HNO₃

(i) NH₃ + HCl ⟶ NH₄Cl

(j) N₂ + H₂ ⟶ NH₃

What type of reaction is respiration ? Explain.

Explain the different types of double decomposition reactions by giving suitable equations.