Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Solutions

Question:

Case: Read the paragraph and answer the following questions

      Colligative properties are not dependent on the chemical nature of the solution’s components. Thus, colligative properties can be linked to several quantities that express the concentration of a solution, such as molarity, normality, and molality. Boiling point elevation, freezing point depression, Relative lowering of vapour pressure and Osmotic pressure are the major colligative properties exhibited by solutions. In 1880 van’t Hoff introduced a factor i, known as the van’t Hoff factor, to account for the extent of dissociation or association.

 

Which of the following colligative property can provide molar mass of polymers?

Options:

Boiling point elevation

Freezing point depression

Relative lowering of vapour pressure

Osmotic pressure

Correct Answer:

Osmotic pressure

Explanation:

Measurement of osmotic pressure provides a method to calculate molar mass of solutes.