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

To separate a mixture of kerosene and petrol, which are miscible liquids and have a boiling point difference of more than 25°C, you can use a process called distillation. Here's how you would proceed:

1. Break Down the Problem

1.1 Identify the components of the mixture: kerosene and petrol.
1.2 Understand the boiling point difference: This allows for separation through distillation.

2. Relevant Concepts

2.1 Distillation is a separation technique based on differences in boiling points of the components in a mixture.
2.2 Kerosene has a boiling point of around 150–300°C, while petrol (gasoline) boils at about 30–200°C.

3. Analysis and Detail

3.1 Set up a distillation apparatus with a boiling flask, a condenser, and a receiving flask.
3.2 Heat the mixture slowly in the boiling flask.
3.3 As the mixture heats up, petrol will evaporate first due to its lower boiling point.
3.4 The vapors of petrol will travel through the condenser, where they will cool and condense back into liquid form.
3.5 Collect the condensed petrol in the receiving flask.
3.6 Continue heating until kerosene starts to evaporate.
3.7 Collect the kerosene separately as it condenses.

4. Verify and Summarize

4.1 Ensure all equipment is set up properly to prevent any loss of the components during the process.
4.2 Verify the collection of both components to ensure the separation was successful.
4.3 Summarize that distillation effectively separated kerosene and petrol due to their boiling points being sufficiently apart.

Final Answer

By employing distillation, you can effectively separate kerosene and petrol from the mixture due to their differences in boiling points.