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At a given temperature (a) Vapour pres...

At a given temperature
(a) Vapour pressure of a solution containing nonvolatile solute is proportional to mole fraction of solvent
(b) Lowering of vapour pressure of solution containing nonvolatile solute is proportional to mole fraction of solute
(c) Relative lowering of vapour pressure is equal to mole fraction of solute

A

a only

B

a,b only

C

a,b and c only

D

b,c only

Text Solution

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The correct Answer is:
C
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When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is : Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is

AAKASH SERIES-SOLUTIONS -Objective Exercise -1
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  2. 6 g of urea is dissolved in 90g of boiling water. The vapour pressure ...

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  3. At a given temperature (a) Vapour pressure of a solution containing ...

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  4. As temperature increases, vapour pressure of a liquid

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  5. Statement-1: Acetone + Carbon disulphide solution shows positive devia...

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  6. Which one of the following is correct for solutions of components of A...

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  7. When mercuric iodide is added to the aqueous solution of potassium iod...

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  8. The degree of dissociation (alpha) of a weak electrolyte Ax By is rela...

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  9. Which of the following aqueous solution has the highest boiling point ...

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  10. When mercuric iodide is added to the aqueous solution of potassium iod...

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  11. In the depression of freezing point experiment, it is found that (a...

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  12. During the depression in freezing point experiment, an equilibrium is ...

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  13. The molal elevation constant is the ratio of the elevation in boliing ...

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  14. The relationship between osmotic pressure at 273 K when 10 g glucose (...

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  15. Equimolar solutions of electrolytes with different number of ion in th...

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  16. If alpha is the degree of dissociation of Na2SO4, the Vant Hoff factor...

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  17. Solution A contains 7g/L MgCl2 and solution B contains 7g/L of NaCl. A...

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  18. Which of the following aqueous solutions containing 10g of solute in e...

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  19. Which of the following salt will have same value of Van't Hoff's facto...

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  20. After removing the hard shell of an egg by dissolving in dil. HCl, a s...

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