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A mixture of ethyl alcohol and propyl al...

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300K. The vapour pressure of propyl alcohol is 200 mm. if the mole fraction of ethyl alcohol is `0.6`, its vapour pressure (in mm) at the same temperature will be

A

350

B

300

C

700

D

360

Text Solution

Verified by Experts

The correct Answer is:
A
According to Raoult's law, `p=p_(A)^(@)x_(A)+p_(B)^(@)x_(B)`
`290=200xx0.4+p_(B)^(@)xx0.6rArrp_(" B")^(@)=350`
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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. The vapour pressure of two liquids 'P' and 'Q' are 80 and 60 torr resp...

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  2. At 300 K the vapour pressure of an ideal solution containing 1 mole of...

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  3. A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of...

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  4. A solution containing components A and B follows Raoult's law, when

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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