Question

`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)`

Answer 1

Correct Answer - B
`DeltaT=K_(b)xx(w_(b)xx1000)/(m_(B)xxw_(A))`
`=K_(b)xx(Yxx1000)/(Mxx250)=(4K_(b)Y)/(M)`