Anaya Thakur
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How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25ºC), which are miscible with each other?

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NCERT Solution for Class 9 Science Chapter 2
Is Matter Around Us Pure
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-24
Questions No-1

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2 Answers

  1. A mixture of two miscible liquids having a difference in their boiling points more than 25°C can be separated by the method of distillation. Thus, kerosene and petrol can be separated by distillation
    In this method, the mixture of kerosene and petrol is taken in a distillation flask with a thermometer fitted in it. We also need a beaker, a water condenser, and a Bunsen burner. The apparatus is arranged as shown in the above figure. Then, the mixture is heated slowly. The thermometer should be watched simultaneously. Kerosene will vaporize and condense in the water condenser. The condensed kerosene is collected from the condenser outlet, whereas petrol is left behind in the distillation flask.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/

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  2. A mixture of kerosene and petrol which are miscible with each other can be separated by distillation.
    Method

    • Take a mixture in a distillation flask.
    •  Fit it with a thermometer.
    • Arrange the apparatus as shown in the figure.
    • Heat the mixture slowly.
    • Petrol vaporises first as it has lower boiling point. It condenses in the condenser and is collected from the condenser outlet.
    •  Kerosene is left behind in the distillation flask.
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