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Question

An aqueous solution containing one gram of urea boils at 100.25oC. The aqueous solution containing 3 gm of glucose in the same volume will boil at:

A
100oC
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B
100.25oC
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C
100.5oC
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D
100.75oC
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Solution

The correct option is B 100.25oC
Solution of non-electrolyte having same concentration will boil at same same temperature.
10g of urea; m=160v=160v

3g of glucose; m=3180v=160v

We know

ΔTb=kb×m

ΔTbm

Here, molarity remains unchanged

Hence, they have the same boiling point.

Hence, the correct option is B

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