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Question

Which one of the following characteristics is associated with adsorption?


  1. ΔG, ΔH and ΔS all are negative.

  2. ΔG and ΔS are negative but ΔH is positive.

  3. ΔG is negative but ΔH and ΔS are positive.

  4. ΔG and ΔH are negative but ΔS is positive.


Solution

The correct option is D

ΔG and ΔH are negative but ΔS is positive.


Adsorption is a spontaneous process with release in energy and decrease in the randomness of the adsorbed substance    ΔG, ΔH & ΔS all are negative.

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