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

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Solution

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

(i) exchange of atoms takes place.
(ii) exchange of ions takes place.
(iii) a precipitate is produced.
(iv) an insoluble salt is produced.

The correct option is:

1 (ii) and (iv)

2 (i) and (iii)

3 only (ii)

4 (ii), (iii) and (iv)

Ans.
(4)

In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution, sodium sulphate chemically reacts with barium chloride in the form of their aqueous solution to form an insoluble white precipitate of barium sulphate and sodium chloride.

$N a_{2} S O_{4} (a q) + B a C l_{2} (a q) \to B a S O_{4} (s) ↓ + 2 N a C l (a q)$
(insoluble)

Here, exchange of ions takes place.

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