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A solution has 1:4 molar ratio of pentan...

A solution has 1:4 molar ratio of pentane and hexane. The vapour pressure of pure hydro-carbons at `20^@C` are 440 mm Hg for pentane and 120 mm of Hg for hexane. The mole fraction of pentane in vapour phase would be

A

`0.200`

B

`0.478`

C

0.547

D

0.786

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The correct Answer is:
B
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AAKASH SERIES-SOLUTIONS -Objective Exercise -2
  1. The mole fraction of solvent in 0.1 molal aqueous solution is

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  2. NaOH aqueous solution is labelled as 10% (w/v). Density of the solutio...

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  3. A solution has 1:4 molar ratio of pentane and hexane. The vapour press...

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  4. O2 is bubbled through water at 293K, assuming that O2 exerts a partial...

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  5. H2S a toxic gas with rottenegg like smell is used for the qualetative ...

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  6. Air contains O2 and N2 in the ratio 0.2 : 0.8. If Henry law constant f...

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  7. The quantity of CO2 in 500ml of soda water when packed under 2.5 atm C...

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  8. Henry’s law constant for the molality of methane in benzene at 298 K i...

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  9. 6 g. of a non volatile solute is dissolved in 90g. of water, such that...

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  10. The vapour pressure of water at 20^@C is 17.54mm Hg. then the vapour p...

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  11. An aq. solution containing 64% by weight of volatile liquid 'A' (molec...

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  12. The weight of urea to be dissolved in 100 g. of water to decrease the ...

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  13. 139.18 g of glucose is added to 178.2 g of water the vapour pressure o...

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  14. The relative lowering of vapour pressure of 0.2 molal solution in whic...

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  15. Vapour pressure of an aqueous solution is 2% less than that of the sol...

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  16. The amount of Glucose to be dissolved in 500g of water so as to produc...

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  17. A Current of dry air was first passed through the bulb containing solu...

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  18. At 20^@C, the vapour pressure of diethyl ether is 442mm. When 6.4g. of...

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  19. The vapour pressure of pure water at 25^@C is 30 mm. The vapour pressu...

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  20. The vapour pressure of a pure liquid 'A' is 60mm, at 25^@C. It forms a...

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