MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistrySolutionsPrevious Year Questions

Which one of the following statements given below concerning properties of solution, describes a colligative effect? (AllMS 2013)

A.Boiling point of pure water decreases by the

B.Vapour pressure of pure water decreases by the

C.Vapour pressure of pure benzene decreases by the✓ Correct

D.Boiling point of pure benzene increases by the

Explanation

The colligative properties are the properties of dilute solution of non-volatile solutes whose value depend on concentration of solute particles in the solution. Naphthalene is a non-volatile solid whereas, all other solutes are volatile. Hence, addition of naphthalene in benzene decreases the vapour pressure of benzene.

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