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The relative decrease in VP of an aqueou...

The relative decrease in `VP` of an aqueous glucose dilute solution is found to be `0.018`. Hence, the elevation in boiling point is (it is given `1 molal` aqueous urea solution boils at `100.54^@)C` at `1 atm` pressure)

A

`0.018^(@)`

B

`0.18^(@)`

C

`0.54^(@)`

D

`0.03^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
`chi_(B)=(DeltaP)/P_(A)^(@)=0.018`
`DeltaT_(b)=K_(b).m rArr 0.54=K_(b) = xx1=K_(b)=0.54`
`m=chi_(B)/(1-chi_(B))xx1000/(Mw_(A))`
`m=0.018/0.982xx1000/18=1.0 rArr DeltaT_(b) = K_(b) xx m=0.54^(@)C`
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