Q68 / 180 · AIIMS 2002 · Chemistry

Assertion : An increase in surface area increases the rate of evaporation. Reason : Stronger the inter-molecular attractive forces, fast is the rate of evaporation at a given temperature.

  • A
    If both the assertion and reason are true and reason is a correct explanation of the assertion.
  • B
    If both assertion and reason are true but assertion is not a correct explanation of the assertion.
  • Correct answer
    C
    If the assertion is true but the reason is false.
  • D
    If both assertion and reason are false.

Solution

More is the surface area, fast is the rate of evaporation at a given temperature this is due to the fact that more surface area means more number of molecules at the surface which can then be evaporated easily. Strong inter-molecular forces of attraction slows down the rate of evaporation.

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

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