# 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: Option 1) 101°C Option 2) 100°C Option 3) 102°C Option 4) 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

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