Question

Q. Calculate the boiling point of a solution containing 1.8 g of a non-volatile solute dissolved
in 90 g of benzene. The boiling point of pure benzene is 353.23K, K, -2.53 Km and
molecular mass of solute = 58 gmor
Q. On dissolving 3.24 g of sulphur in 40 g of benzene, boiling point of solution was higher
than that of benzene by 0.81 K. What is the molecular formula of sulphur? Ky for benzene -
2.53 Kkgmol and atomic mass of sulphur = 32 gmor
Q. The vapour pressure of an aqueous solution of cane sugar(molecular mass = 342) is 732
mm Hg at 100°C. Calculate the boiling point of the solution (K, for water = 0.52")
Q. What is the effect on boiling point of a liquid, when the external atmospheric pressure
above the liquid is increased. Explain with your answer.
Q. Explain why the boiling point of a solution containing non-volatile solute is higher than
that of pure solvent.
Q. Explain the elevation of boiling point of a solution graphically by plotting vapour pressure
versus temperature,
Derive the relationship AT = K x m.​

Answer 1

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