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(B) When a non-volatile solute is added to a solvent,the vapour pressure of the solution decreases compared to the pure solvent.According to the defin

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$B$. An increase in boiling point of the solution

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(B) When a non-volatile solute is added to a solvent,the vapour pressure of the solution decreases compared to the pure solvent.According to the definition of boiling point,it is the temperature at which the vapour pressure of the liquid becomes equal to the atmospheric pressure.Since the vapour pressure of the solution is lower,it requires more heat to reach the atmospheric pressure.Therefore,the boiling point of the solution increases. This phenomenon is known as elevation in boiling point.

When a substance is dissolved in a solvent,the vapour pressure of the solvent decreases. It brings:

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