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Steam distillation is based on...

Steam distillation is based on

A

Boyle's law

B

Charle's law

C

Dalton's law of partial pressures

D

Avogadro's law

Text Solution

Verified by Experts

The correct Answer is:
C
In steam distillation , water and organic compound vaporize together and their partial vapor pressures together equal the atmospheric pressure.
Vapor pressure of organic compound + Vapor pressure of water = Atmospheric pressure
Since the vapor pressure of the organic compound is less than the atmospheric pressure, the organic compound vaporizes at lower temperature.
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Steam distillation is used for separation and purification of those compounds which are.............with water but................ .

Steam distillation is used to purify a compound which is steam principle volatile and insoluble in water. The impurities should not be steam volatile. It is based on the principle that liquid will boil when partial vapour presure of liquid and partial vapour pressure of steam both become equal to atmospheric presure P=p_(1)+p_(2) . It reduces the boiling point of liquid. ("Wt. of water distilled")/("Wt. of substance distilled")= ("M. Wt. of water" xx V.P. " of steam")/(M. Wt. "of substance" xx "V.P. substance") Whilch of the following is steam volatile?

Knowledge Check

  • Assertion (A) Aniline is purified by steam distillation. Steam distillation is used for purification of substances which are insoluble in water but volatile in steam.

    A
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    B
    Both A and R are true but R is not a correct explation of A
    C
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    D
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    A
    Fatty acids
    B
    Higher alkanes
    C
    Mineral oils
    D
    Essential oils

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    B
    Essential oil
    C
    Aniline
    D
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