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Question

van't Hoff factors of aqeuous solutions of x, y and z are 2.8, 1.8 and 3.5 respectively. Which of the following statements is correct?

A
Boiling Point Order : x<y<z
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B
Freezing Point Order : z<x<y
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C
Osmotic Pressure Order: x=y=z
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D
Vapour Pressure Order : y<x<z
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Solution

The correct option is B Freezing Point Order : z<x<y
Observed colligative property =i × normal colligative property

Depression in freezing point follows the order :
y<x<z(TF=T0fΔTf)

Freezing point of the solutions follows the order : z<x<y

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