Question

Substance ‘P’ has the following properties: 1. Melts at 80°C 2. Boils at 150°C 3. Soluble in water . Which method of separation would you use to obtain pure ‘P’ from a mixture of ‘P’ and water? *​

Answer 1

Answer:

By evaporation or crystallisation.

Explanation:

In each of the processes,If we heat the mixture of P and water and continue to increase the temperature,at 100°C water will completely turn into water vapour( steam) . But, P will not(since it's boiling point is 150°C)and will left behind and get separated from initial water

Answer 2

Answer:

We can use crystallisation or evaporation for the separation, to obtain pure ‘P’ from a mixture of ‘P’ and water.

Explanation:

If we heat the mixture of P and water in each of the processes and raise the temperature, the water will totally transform into water vapour (steam) at a temperature of $100$°C. However, P won't since it has a boiling point of $150$ °C and will stay behind, separating from the initial water. The physical process of changing a liquid into its gaseous phase at a specific high temperature is called evaporation. The physical process by which crystals form is known as crystallisation.

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