Question

Assertion: Chlorine can displace iodide ions from $\mathrm{KI}$ solution.

Reason: It is an example of a displacement reaction.

• A. If both assertion and reason are true and the reason is the correct explanation of assertion.
• B. If both assertion and reason are true but the reason is not the correct explanation of assertion.
• C. If the assertion is correct but the reason is incorrect.
• D. If the assertion is incorrect but the reason is correct.

Answer 1

The correct option is A

If both assertion and reason are true and the reason is the correct explanation of assertion.

The explanation for the assertion.

The reaction of chlorine and potassium iodide

1. Chlorine $\left(\mathrm{Cl}\right)$ is a stronger oxidizing agent (a substance that can reduce other substances) than iodine $\left(\mathrm{I}\right)$.
2. Chlorine reacts with potassium iodide $\left(\mathrm{KI}\right)$ to form potassium chloride $\left(\mathrm{KCl}\right)$ and Iodine.

$\mathrm{KI}\left(\mathrm{aq}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)\to \mathrm{KCl}\left(\mathrm{aq}\right)+{\mathrm{I}}_2\left(\mathrm{s}\right)$

Hence, the assertion is correct.
The explanation for the reason statement.

Displacement reaction.

1. In a displacement reaction, a more reactive species can displace a less reactive species from a compound.
2. In the reaction above, chlorine displaces iodine from potassium iodide.

Hence, the reason is correct and the reason is the correct explanation of the assertion.