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If 2 moles of A and 3 moles of B are mix...

If 2 moles of A and 3 moles of B are mixed to form an ideal solution vapour pressure of A and B are 120 and 180 mm of Hg respectively, then the composition of A and B in the Vapour phase when the first traces of vapour are formed in the above case is

A

`X^| A`=0.407

B

`X^| A`= 0.8

C

`X^|A` = 0.109

D

`X^| A`= 0.307

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-SOLUTIONS -Objective Exercise -2
  1. At certain temperature, the solution of benzene in toulene exihibits t...

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  2. A solute has 2:3 molar ratio of toulene to benzene. The vapour pressur...

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  3. If 2 moles of A and 3 moles of B are mixed to form an ideal solution v...

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  4. The vapour pressure of a solvent decreased by 10 mm of mercury, when a...

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  5. The vapour pressure of pure benzene is 640 mm at 298K. A solution of a...

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  6. The vapour pressure of water at room temperature is 23.8 mm Hg. The va...

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  7. The vapour pressure of pure A is 10 torr and at the same temperature w...

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  8. The percentage composition by weight of an aqueous solution of a solut...

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  9. Molality of an aqueous solution that produces an elevation of boiling ...

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  10. The molal elevation constant of water is 0.51. The boiling point of 0....

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  11. Ebullioscopy is concerned with:

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  12. An aqueous solution containing one gram of urea boils at 100.25^@C. Th...

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  13. A solution prepared by dissolving 0.8gm of naphthalene in 100g of C Cl...

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  14. A solution containing 3.3g of a substance in 125g of benzene (b.pt. = ...

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  15. An aqueous solution freezes at - 0.372^@C. If Kf and Kb for water are ...

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  16. Which of the following aqueous solutions should have the highest boili...

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  17. The depression in freezing point of 0.01 m aqueous solution of urea, s...

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  18. Molal depression constant is given by the expression:

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  19. To 500 "cm"^3 of water. 3.0 xx 10^(-3) kg of acetic acid is added. If ...

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  20. 'x' gm of solute (M. mass = 342) should be dissolved in 500gm of water...

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