In which of the following types of reaction is there an exchange of ions between the reactants?

Correct option is C

Correct Answer: (c) Double displacement reaction

Explanation:
In a double displacement reaction, there is an exchange of ions between the reactants, leading to the formation of two new compounds. These reactions typically occur in aqueous solutions and often result in the formation of a precipitate, gas, or water.

For example:

NaCl+AgNO₃→NaNO₃+AgCl (precipitate)

Here, ions of sodium (Na⁺) and silver (Ag⁺) are exchanged between the reactants.

Other Options:

• Decomposition: A single compound breaks down into two or more simpler substances, with no exchange of ions.
• Addition reaction: Two or more substances combine to form a single product, without ion exchange.
• Disproportion reaction: A single element undergoes both oxidation and reduction in the same reaction, but no ion exchange occurs.