Because the question states that kerosene and gasoline are miscible and their boiling points differ by more than 25oC, which is a significant difference, they can be separated using a simple distillation process.
Simple distillation is a common method for the purification of organic compounds.
It separates volatile liquids from non-volatile impurities and liquids with large boiling point differences.
The compounds with lowest boiling points evaporate first.
The resulting vapors are then cooled, and the liquids are collected separately.
After some time, the mixture begins to boil, and the component with the lower boiling point begins to evaporate first..
The component with the highest boiling point is the last to form vapors and can thus be collected separately.
Final Answer:
Distillation can separate a mixture of kerosene and petrol that is miscible with each other.
Place the mixture in a distillation flask and attach a thermometer to it.
When we slowly heat the mixture, we will notice that petrol evaporates first because it has a lower boiling point.
It condenses in the condenser and drains through the condenser outlet.
Kerosene remains in the distillation flask.