Question

how will you separate a mixture containing kerosene and petrol ( difference in their boiling points is more than 25 C) which are miscible with each other?

Answer 1

Answer:

• 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.

Answer 2

Answer:

The mixture of two miscible liquids such as kerosene and petrol whose boiling points differ by more than 25°C can be easily separated by the technique of simple distillation.      The separation is based upon the principle that the boiling point of more volatile (low building liquid of the mixture. The vapour almost exclusively consists of the more volatile liquid Likewise at the boiling of the less volatile (high boiling) liquid, vapours almost entirely consists  of the less volatile liquid since the more volatile liquid has already distilled over.