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On a humid day in summer, the mole fract...

On a humid day in summer, the mole fraction of gaseous `H_(2)O` (water vapour) in the air at `25^(@)C` can be as high as 0.0287. Assuming a total pressure of 0.977atm. What is the partial pressure of dry air ?

A

94.9atm

B

0.949atm

C

949atm

D

0.648atm

Text Solution

Verified by Experts

The correct Answer is:
B
`p_(H_(2)O)=x_(H_(2)O)" "p_("totle")=0.0287xx0.977=0.028atm`
`p_("total")=p_("dry air")+p_(H_(2)O)`
`p_("dry air")=p_("total")-p_(H_(2)O)=0.977-0.028=0.949atm`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SOLUTIONS AND COLLIGATIVE PROPERTIES -Exercise 1 (Types of Solutions and Concentration of Solutions)
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  2. One component of a solution follows Raoult's over the entire range 0le...

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  3. On a humid day in summer, the mole fraction of gaseous H(2)O (water va...

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  4. The vapour pressure of two liquids 'P' and 'Q' are 80 and 60 torr resp...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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