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Elevation in boiling point for 1 . 5 molal solution of glucose in water is 4   K . The depression in freezing point for 4 . 5 molal solution of glucose in water is 4   K . The ratio of molal elevation constant to molal depression constant K b / K f is

Correct answer

3

Step-by-step solution

Elevation in boiling point ∆ T b = ik b m 1 Depression in freezing point ∆ T f = ik f m 2 4 = ik b 1 . 5 4 = ik f 4 . 5 Dividing both: k b k f = 3 1 Hence, The ratio of molal elevation constant to molal depression constant is 3:1

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