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If molality of the dilute solutions is doubled, the value of molal depression constant (Kf) will be:

1. halved
2. tripled
3. unchanged
4. doubled

Correct answer: unchanged

Solution

The molal depression constant (Kf) is a property of the solvent and does not depend on the molality of the solution. Therefore, doubling the molality will not affect the value of Kf.

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