Question

Mixture of iodine and Sodium Sulphate is separated by .........

• A. Sublimation
• B. Chromatography
• C. Differential extraction
• D. Distillation

Hint:

Sublimation is a useful separation technique when one of the components (like iodine) sublimes at a relatively low temperature.

Answer 1

The Correct Option is A

Step 1: Understanding sublimation.
Sublimation is the process where a solid changes directly into a gas without passing through the liquid phase. Iodine is a substance that sublimes, making it separable from sodium sulfate through this process.

Step 2: Analyzing the options.
(A) Sublimation: This is the correct answer because iodine sublimes, allowing it to be separated from sodium sulfate.
(B) Chromatography: Chromatography is used for separating components based on different affinities for a stationary phase, but it’s not suitable for this mixture.
(C) Differential extraction: This technique involves separating based on solubility differences, not for sublimation.
(D) Distillation: Distillation is used for separating liquids with different boiling points, but not for separating solids from salts.

Step 3: Conclusion.
The correct answer is (A) Sublimation, as iodine can be separated from sodium sulfate by sublimation.