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AIIMS 2011
Exam
AIIMS
Year
2011
Subject
Chemistry
Chapter
Solutions

AIIMS 2011 · Chemistry · Solutions

Assertion : A non volatile solute is mixed in a solution then...

Assertion : A non volatile solute is mixed in a solution then elevation in boiling point and depression in freezing point both are 2 K2 \mathrm{~K}. Reason : Elevation in boiling point and depression in freezing point both depend on melting point of non-volatile solute.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

Elevation in boiling point (ΔTb)=Kb×m\left(\Delta T_b\right)=K_b \times m Depression in freezing point \left(\Delta T_f\right)=K_f \times m.Elevationinboilingpointanddepressioninfreezingpointarecolligativepropertiesi.e.,theydependonlyonthenumberofparticlesofthesolute.Valueof. Elevation in boiling point and depression in freezing point are colligative properties i.e., they depend only on the number of particles of the solute. Value ofK_b and K_faredifferent,soare different, so\Delta T_bandand\Delta T_f are also different.
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