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Given below are two statements: Statement-I: Sublimation is used for the separation and purification of compounds with low melting point. Statement-II: The boiling point of a liquid increases as the external pressure is reduced. In the light of the above statements, choose the correct answer from the options given below:

1. Statement-I is false but Statement-II is true.
2. Statement-I is true but Statement-II is false.
3. Both Statement-I and Statement-II are true.
4. Both Statement-I and Statement-II are false.

Correct answer: Both Statement-I and Statement-II are false.

Solution

Sublimation is typically used for substances that can transition directly from solid to gas without passing through a liquid phase, often applicable to compounds with low melting points, making Statement-I misleading. Additionally, the boiling point of a liquid actually decreases when external pressure is reduced, contradicting Statement-II.

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