Q66 / 180 · AIIMS 2005 · Chemistry

Assertion : The molecular weight of acetic acid determined by depression in freezing point method in benzene and water was found to be different. Reason : Water is polar and benzene is non-polar.

  • Correct answer
    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.

Solution

Depression in freezing point is a colligative property which depends upon the number of particles. The number of particles are different in case of benzene and water that is why molecular weight of acetic acid determined by depression in freezing point method is also different.

Hence, the correct answer is option: 'A'.

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