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Question

Binary liquid mixtures which exhibit positive deviations from Raoult's law boil at temperature ______ than the expected boiling point:

A

Lower

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B

Higher

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C

Same

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D

Con't be said

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Solution

The correct option is A

Lower


When a mixture of 2 liquids exhibit positive deviation, the attractive force between the liquids is less and hence show high vapour pressure than expected. They boil at lower temperature than expected.


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