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Question

The cryoscopic constant value depends upon?
  1. the molar mass of the solute in the solution
  2. the molar mass of the solvent in the solution
  3. the enthalpy of vaporization of the solvent
  4. the freezing point of the solvent

A
the molar mass of the solute in the solution
B
the molar mass of the solvent in the solution
C
the enthalpy of vaporization of the solvent
D
the freezing point of the solvent
Solution
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Cryoscopic constant may be defined as the depression in freezing point when one mole of non-volatile solute is dissolved in one kg of solvent. It may also be defined as the molal depreesion constant . Its unit is k.kg.mol1. It depends on the malar mass of the solute in the solution.

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Similar Questions
Q1
Which of the following is correct?
Here,
Kf is cryoscopic constant
Tf is F.P. of pure solvent
M is the molar mass of solvent
ΔHfus is the molar enthalpy of fusion of the solvent
All quantities are in SI units

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Q2
Which of the following is/are correct?
Here,
Kf is cryoscopic constant
Tf is F.P. of pure solvent
M is the molar mass of solvent
ΔHfus is the molar enthalpy of fusion of the solvent
All quantities are in SI units

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Q3
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Q4
If 1g of solute (molar mass =50g mol1) is dissolved in 50g of solvent and the elevation in boiling point is 1K. The molar boiling constant of the solvent is?
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Q5
If a pure solvent A boils at 127C, then calculate the value of ebullioscopic constant of that solvent.
Given :The enthalpy of vapourisation of solvent is 8000 cal mol1
Molar mass of the solvent is 80 g/mol
R(ideal gas constant)2 cal mol1 K1
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