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The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in another solvent is respectively:

1. less than one and greater than one.
2. less than one and less than one.
3. greater than one and less than one.
4. greater than one and greater than one.

Correct answer: greater than one and less than one.

Solution

The van't Hoff factor (i) is greater than one for dissociation because the compound splits into more particles, and less than one for association because particles combine to form fewer entities.

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