Write chemical equations for the following word equations and balance them.

(a) Carbon + Oxygen ⟶ Carbon dioxide

(b) Nitrogen + Oxygen ⟶ Nitrogen monoxide

(c) Calcium + Nitrogen ⟶ Calcium nitride

(d) Calcium oxide + Carbon dioxide ⟶ Calcium carbonate

(e) Magnesium + Sulphuric acid ⟶ Magnesium sulphate + Hydrogen

(f) Sodium reacts with water to form sodium hydroxide and hydrogen.

Balance the following equations:

(a) Fe + H₂O ⟶ Fe₃O₄ + H₂

(b) Ca + N₂ ⟶ Ca₃N₂

(c) Zn + KOH ⟶ K₂ZnO₂ + H₂

(d) Fe₂O₃ + CO ⟶ Fe + CO₂

(e) PbO + NH₃ ⟶ Pb + H₂O + N₂

(f) Pb₃O₄ ⟶ PbO + O₂

(g) PbS + O₂ ⟶ PbO + SO₂

(h) S + H₂SO₄ ⟶ SO₂ + H₂O

(i) S + HNO₃ ⟶ H₂SO₄ + NO₂ + H₂O

(j) MnO₂ + HCl ⟶ MnCl₂ + H₂O + Cl₂

(k) C + H₂SO₄ ⟶ CO₂ + H₂O + SO₂

(l) KOH + Cl₂ ⟶ KCl + KClO + H₂O

(m) NO₂ + H₂O ⟶ HNO₂ + HNO₃

(n) Pb₃O₄ + HCl ⟶ PbCl₂ + H₂O + Cl₂

(o) H₂O + Cl₂ ⟶ HCl + O₂

(p) NaHCO₃ ⟶ Na₂CO₃ + H₂O + CO₂

(q) HNO₃ + H₂S ⟶ NO₂ + H₂O + S

(r) P + HNO₃ ⟶ NO₂ + H₂O + H₃PO₄

(s) Zn + HNO₃ ⟶ Zn(NO₃)₂ + H₂O + NO₂

The number of carbon atoms in a hydrogen carbonate radical is

1. one
2. two
3. three
4. four

The formula of iron (III) sulphate is

1. Fe₃SO₄
2. Fe(SO₄)₃
3. Fe₂(SO₄)₃
4. FeSO₄