An aqueous solution containing 1g of urea boils at `100.25^(@)C`. The aqueous solution containing 3g of glucose in the same volume will boil be

Options

A. `100.75^(@)C`
B. `100.5^(@)C`
C. `100.25^(@)C`
D. `100^(@)C`

Answer

C

Explanation

`DeltaT=0.25^(@)C,m=1//60W`
W is the wt. of solvent water
`0.25=(1)/(60W)xxK_(b)`
For glucose :m = 3 /180W
`DeltaT_(b)=(3)/(180W)xxK_(b)`
`(DeltaT_(b))/(0.25)=(3K_(b))/(180W)xx(60W)/(K_(b))`
`DeltaT_(b)=0.25`.