The molal boiling point constant for water is`0.513^(@)C kgmol^(-1)`. When `0.1`mole of sugar is dissolved in `200`ml of water , the solution boils under a pressure of one atmosphere at

Options

A. `100.513^(@)C`
B. `100.0513^(@)C`
C. `100.256^(@)C`
D. `101.025^(@)C`

Answer

C

Explanation

`DeltaT_(b)=K_(b)xxm=0.513xx((0.1)/(200)xx1000)`
`=0.2565^(@)C,T_(b)=100.256^(@)C`