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Elevation in the boiling point for 1 molar solution of glucose is 2 K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2 K. The relation between K b and K f is :

1. K b = K f
2. K b = 0.5 K f
3. K b = 1.5 K f
4. K b = 2 K f

Correct answer: K b = 2 K f

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