Question

Name three

(1) sulphates

(2) chlorides insoluble in water and – two

(1) oxides

(2) carbonates soluble in water. 

Answer 1

(1) Three sulphates insoluble in water 

Lead sulphate (PbSO₄ ), Calcium sulphate (CaSO₄), and Barium sulphate (BaSO₄).

(2) Three chloride insoluble in water

Silver chloride (AgCl), Lead chloride (PbCl₂ ), and Mercury chloride (Hg₂Cl₂ or HgCl).

(1) Two oxides soluble in water

Sodium oxide (Na₂O ), and Potassium oxide (K₂O)

(2) Two carbonates soluble in water 

Sodium carbonate (Na₂CO₃), and Ammonium carbonate [(Na₄)₂CO₃]