The vapour pressure of water at room temperature is $23.8 \ mm \ Hg$. The vapour pressure of an aqueous solution of sucrose with mole fraction of $0.1$ is equal to .......... $mm \ Hg$.
- A$23.9$
- B$24.2$
- C$21.42$
- D$31.44$
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An aqueous solution of $2 \%$ non-volatile solute exerts a pressure of $1.004 \ bar$ at the normal boiling point of the solvent. What is the molar mass of the solute?
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Reason $:-$ Rate of vaporisation of a liquid is directly proportional to surface area.
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