At 100°C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732mm. If Kb = 0.52, the boiling point of this solution will be:
101°C
100°C
102°C
103°C
Mathematical Expression -
Unis of
- wherein
Let's find the molar mass of the solute first By Roalt's law of partial pressure
Then we know that
Option 1)
101°C
correct option
Option 2)
100°C
incorrect option
Option 3)
102°C
incorrect option
Option 4)
103°C
correct option