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. 10
B. `10 Delta T_(b)`
C. `Delta T_(b)`
D. `Delta T_(b)//10`

Answer

C

Explanation

`Delta T_(b) = (K_(b) xx W_(2))/(M_(2) xx W_(1)) xx 1000`
`Delta T_(b)=K_(b) xx(10/(100 xx 100) xx 1000)=K_(b)`
`K_(b) = Delta T_(b)`