Home
Class 12
CHEMISTRY
A: Lowering of vapour pressure depends u...

A: Lowering of vapour pressure depends upon concentration of solute.
R: Relative lowering of vapour pressure is a colligative property

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question, we need to analyze both statements carefully. ### Step 1: Understand the Assertion The assertion states that "Lowering of vapor pressure depends upon concentration of solute." - **Explanation**: This is true. When a non-volatile solute is added to a solvent, the vapor pressure of the solvent decreases. The extent of this lowering depends on the concentration of the solute particles in the solution. The more solute particles present, the greater the lowering of the vapor pressure. ### Step 2: Understand the Reason The reason states that "Relative lowering of vapor pressure is a colligative property." - **Explanation**: This is also true. Colligative properties are properties that depend on the number of solute particles in a solution, not their identity. The relative lowering of vapor pressure is defined as the difference between the vapor pressure of the pure solvent and the vapor pressure of the solution, divided by the vapor pressure of the pure solvent. This relative lowering is directly related to the mole fraction of the solute, which is a measure of concentration. ### Step 3: Conclusion Both the assertion and the reason are correct. Furthermore, the reason provides a correct explanation for the assertion. - **Final Answer**: Both Assertion (A) and Reason (R) are correct, and R is the correct explanation of A.
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

Lowering in vapour pressure is a colligative property.

Prove that relative loweing in vapour pressure is a colligative property.

Knowledge Check

  • Relative lowering of vapour pressure is a colligative property because

    A
    it depends on the concentration of non-electrolyte solute in solution and does not depend on the nature of the solute molecules
    B
    it depends on number of particle of electrolyte solute insolution and does not depend on the nature of the solute molecules
    C
    it depends on the concentration of non-electrolyte solute in solution as well as on the nature of the solute molecules
    D
    depends on the concentration of an electrolyte or non-electrolyte solute in in solution as well as on the nature of solute molecules

  • Relative lowering of vapour pressure is a colligative property because

    A
    It depends on the xoncentration of a non-electrolyte solute in solution and does not depend on the nature of the solute molecules
    B
    It depends on number of particles of electrolyte solute in solution and does not depend on the nature of the solute particles.
    C
    It depends on the concentration of a non-electrolyte solute in solution as well as on the nature of the solute molecules.
    D
    It depends on the concentration of an electrolyte or non-eletrolyte solute in solution as well as on the nature of solute molecules.

  • Relative lowering of vapour pressure is a colligative property because …………….. .

    A
    It depends on the concentration of a non-electrolyte solute in solution and does not depend on the nature of the solute molecules
    B
    It depends on number of particles of electrolyte solute in solution and does not depend on the nature of the solute particles
    C
    It depends on the concentration of a non-electrolyte solute in solution as on the nature of the solute molecules
    D
    It depends on the concentration of an electrolyte or non-electrolyte solute in solution as well as on the nature of solute molecules

    • Similar Questions

    Explore conceptually related problems

    The relative lowering in vapour pressure is:

    Unit of lowering of vapour pressure is

    STATEMENT-1 : Relative lowering of vapour pressure is equal to mole fraction of the solute. and STATEMENT-2 : Relative lowering of vapour pressure is a colligative property.

    The law of relative lowering of vapour pressure was given by

    The law of relative lowering of vapour pressure was given by

    Home
    Profile