Question

Which of the following has highest boiling point?
(a) 0.1 m urea solution in water
(b) 0.2 m solution of sucrose in water
(c) 0.3 m solution of fructose in water
(d) 0.5 m solution of glucose in water​

Answer 1

Answer:

0.5 m solution of Glucose in water

Explanation:

As in dilute solution boiling point is directly proportional to molal concentration of solute in solution.

Answer 2

Answer:

The correct answer is d) 0.5m solution of glucose in water

Explanation:

Elevation in boiling point is a colligative property which states that when a non-volatile solute is added to a solvent, its boiling point increases depending upon the concentration of the solute.

In other words, the boiling point is directly proportional to the solute concentration irrespective of the nature of the solute. The elevation in boiling point is given by,

Δ$T_{b}$ = i x $K_{b}$ x m

where, $T_{b}$ - Elevation in boiling point

            i   -  Van't Hoff Factor

           $K_{b}$-  ebullioscopic constant

           m -   molality of the solute

It could be clearly seen that the boiling point is directly proportional to the molality of the solution.

Thus, 0.5m solution of glucose in water has higher solute concentration and when this solute is added to the solvent, maximum boiling point could be observed.

Hence, the correct option is d)0.5m solution of glucose in water.

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