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On adding solute to a solvent having vap...

On adding solute to a solvent having vapour pressure `0.80atm`,vapour pressure reduces to `0.60atm`.Mole fraction of solute is

A

`0.25`

B

`0.75`

C

`0.50`

D

`0.33`

Text Solution

Verified by Experts

The correct Answer is:
A
`(P^(0)-P^(s))/(P^(0))=(n)/(n+N),P^(0)=0.80,P_(s)=0.60`
`:. (n)/(n+N)=(0.2)/(0.8)=0.25`
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Knowledge Check

  • On adding a solute to a solvent having vapour pressure reduces to 0.60 atm. Mole fraction of solute is :

    A
    0.25
    B
    0.75
    C
    0.5
    D
    0.33

  • On adding a solute to a solvent having vapour pressure reduces to 0.60 atm. Mole fraction of solute is :

    A
    0.25
    B
    0.75
    C
    0.5
    D
    0.33

  • At 300 K when a solute is added to a solvent its vapour pressure over the mercury reduceds from 50 mm to 45mm. The value of mole fraction of solute will be

    A
    `0.005`
    B
    `0.010`
    C
    `0.100`
    D
    `0.900`
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