Question

In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution:

1. exchange of atoms takes place
2. exchange of ions takes place
3. a precipitate is produced
4. an insoluble salt is produced

The correct option is:

Options

• (B) and (D)

• (A) and (C)

• only (B)

• (B), (C) and (D)

Answer 1

(B), (C) and (D)

Explanation:

\[\ce{\underset{\text{Sodium sulphate}}{Na2SO4(aq)}+\underset{\text{Barium Chloride}}{BaCl2(aq)}->\underset{\text{Barium Sulphate}}{BaSO4(s)}+\underset{\text{Sodium Chloride}}{2NaCl(aq)}}\]

The white precipitate of BaSO₄ is formed by the reaction of `"SO"_4^(2-)` and Ba²⁺.

Hence, the correct answer is the (B), (C), and (D).