If the elevation in boiling point of a solution of 10 g of solute (molecular weight = 100) in 100 g of water is `Delta T_(b)`, the ebullioscopic constant of water is

Options

A. `DeltaT_(b)//10`
B. `DeltaT_(b)`
C. `10DeltaT_(b)`
D. `100DeltaT_(b)`

Answer

b

Explanation

`m = (1000xxK_(b)xxw)//(WxxDeltaT_(b))`
or `K_(b) = (mxxWxxDeltaT_(b))/(1000xxw) = (100xx100xDeltaT_(b))/(1000xx10) = DeltaT_(b)`