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Figure explains elevation in boiling poi...

Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked.

Elevation in b.p of an aqueous urea solution is `0.52^(@) (K_(b) = 0.52^(@) mol^(-1)kg)`. Hence, mole fraction of urea in this solution is:

A

`0.982`

B

`0.0567`

C

`0.943`

D

`0.018`

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The correct Answer is:
D
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