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Relative loweringof vapour pressure of a...

Relative loweringof vapour pressure of a dilute solution is `0.2`. What is the mole fraction of non-volatile solute ?

A

0.8

B

0.5

C

0.3

D

0.2

Text Solution

Verified by Experts

The correct Answer is:
D
According to Raoult's law the relative lowering in vapour pressure of an ideal solution containing the non-volatile solute is equal to the mole fraction of the solute.
`because` Relative lowering of vapour pressure = 0.2
`because` Mole fraction of the solute = 0.2
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SOLUTIONS AND COLLIGATIVE PROPERTIES -Exercise 1 (Types of Solutions and Concentration of Solutions)
  1. A solution containing components A and B follows Raoult's law, when

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  2. At 80^(@)C the vapour pressure of pure liquid 'A' is 520 mm Hg and tha...

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  3. Relative loweringof vapour pressure of a dilute solution is 0.2. What ...

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  4. Which of the following will show a negative deviation from Raoult's la...

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  5. Mole fraction of vapour of A above solution in mixture of A and B(X(A)...

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  6. In which case Raoult's law is not applicable ?

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  7. Which of the following liquid pairs shows a positive deviation from Ra...

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  8. If two substances A and B have p(A)^(@): p(B)^(@) = 1:2 and have mole ...

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  9. Relative lowering in vapour pressure of solution containing non-volati...

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  10. The vapour pressure of pure benzene at a certain temperature is 640 mm...

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  11. If M is molecular of solvent, K(b) is molal elevation constant, T(b) i...

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  12. Solute is non-volatile and solvent molecule is volatile. Which of the ...

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  13. When two liquids A and B are mixed, their boiling points become greate...

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  14. Vapour pressure of C CL(4) at 25^@C is 143 mmHg 0.05g of a non-volatil...

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  15. The vapour pressure of two liquids P and Q are 100 and 50 torr, respec...

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  16. Which of the following plot obeys the Raoult's law for all concentrati...

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  17. At 40^(@)C the vapour pressure of pure liquids, benzene and toluene, a...

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  18. The solution which shows large positive deviation from Raoult's law fo...

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  19. 1xx10^(3)m" solution of Pt "(NH(3))(4)Cl(4) " in "H(2)O shows depress...

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  20. What happens to freezing point of benzene when nephthalens is added ?

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