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Question

Substances that do not vapourise easily are called non-volatile substances. When these are dissolved in a liquid like benzene, it:

A
Freezes
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B
Boils at a lower temperature
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C
Boils at a higher temperature
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D
Increases in volume
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Solution

The correct option is A Boils at a higher temperature
The mixture boils at high temperature due to rise in boiling point. Due to decrease in vapour pressure from solvent more energy is required to increase vapour pressure back to atmospheric pressure.

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