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Assertion: Elevation in boiling point is...

Assertion: Elevation in boiling point is a colligative property.
Reason: Elevation in boiling point is directly proportional to molarity.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true, but reason is not the correct explanation of assertion.

C

If assertion is true, but reason is false.

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
C
When a solute is dissolved in a solvent the boiling point of a solvent will increase. This is referred to as boiling point elevation. This elevation in boiling point is directly dependent on the amount of solute present in the solution but it is not based on the nature of the solute, hence, elevation in boiling point is considered as colligative property. However, elevation in boiling point is directly proportional to molality of the solution not molarity. Thus, assertion is true but reason is false.s
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Knowledge Check

  • Colligative properties like osmotic pressure, elevation in boiling point etc. depend upon

    A
    number of solute particles and polarity of solvent
    B
    on the degree of polarity of solute
    C
    only on the number of solute particles
    D
    number of solute particles and the nature of solute.

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