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Y g of non-volatile organic substance of...

`Y g` of non-volatile organic substance of molecular mass `M` is dissolved in `250 g` benzene. Molal elevation constant of benzene is `K_(b)`. Elevation in its boiling point is given by:s

A

`1.34K_(b)`

B

`0.98K_(b)`

C

`2.40K_(b)`

D

`K_(b)`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaT=K_(b)xx(w_(b)xx1000)/(m_(B)xxw_(A))`
`=K_(b)xx(Yxx1000)/(Mxx250)=(4K_(b)Y)/(M)`
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