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Assertion:- When Benzoic acid is dissolved in benzene its vant Hoff factor is less than one.

Reason:- In benzene, benzoic acid has tendency to form dimer.

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Important Questions on Solutions

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Assertion:- van't Hoff factor for benzoic acid in benzene is one.

Reason:- Benzoic acid behaves as a weaker electrolyte in benzene.

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Assertion:- van't Hoff factor is always more or equal to one.

Reason:- van't Hoff factor is the ratio of experimental colligative properties to observed colligative properties.

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Assertion:- Azeotropic mixture can not be separated by fractional distillation.

Reason:- Azeotropic mixtures are constant boiling mixtures.

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Assertion:- ΔHmixand ΔVmix for the preparation of ideal solution is zero.

Reason :- A-B interactions in ideal solution are same as between A-A and B-B in the two liquids before mixing.

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Assertion:- 0.1 M solution of NaCl have low freezing point than 0.1M urea solution.

Reason:- Van't Hoff factor (No. of particles) for NaCl is more than urea.

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Assertion: Elevation in boiling point of 0.1MKCl and 0.1MCaCl2 is same.
Reason: Because colligative properties depends on molarity only.
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Assertion:- On mixing aniline and Acetone shows +ve deviation.

Reason: - Interaction between Acetone and aniline is weaker than interaction of Acetone-Acetone and aniline-aniline.

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Assertion:- When two volatile liquids are mixed then vapour pressure of one increases and other decreases.

Reason:- Vapour pressure of solution decreases.