Discussion Forum



1)

If the elevation in boiling point of  a solution of 10 g of solute (mol.wt=100) in 100 g of water is $\triangle T_{b}$ , the ebulliscopic constant of water is 


A) 10

B) $100 T_{b}$

C) $\triangle T_{b}$

D) $\frac{ \triangle T_{b}}{10}$

Answer:

Option C

Explanation:

 We know that, $\triangle T_{b}= \frac{1000 \times K_{b} \times w}{W \times M}$

$M= \frac{1000 \times K_{b} \times w}{W \times \triangle T_{b}}$

$\triangle T_{b}=\frac{1000 \times K_{b} \times 10}{100 \times 100}$

$\triangle T_{b}=K_{b}$