Question

Which of the following aqueous solutions has maximum boiling point? 0.1 M sucrose 0.2 M urea 0.3 M glucose 0.4 M fructose

Answer 1

Given,

Molarity of solutions

To find

Solution having maximum boiling point

Concept

Boiling point of water is 100 °C. It increases due to the presence of solid solute like urea, glucose, sucrose etc. Elevation in boiling point is directly proportional to molality of the solution .This is because, elevation in boiling point has the formula

∆T = $k_{b}m </p><p></p><p>where \: k_{b} = molal \: elevation \: constant </p><p></p><p>and , m \: = \: molality$

Solution

For dilution solution , molality is nearly equal to molarity. Hence, that solution will have highest elevation in boiling point which has higher molarity .

Hence, the answer is 0.4 M fructose