NEET2016Chemistry-Surface Chemistry
NEET 2016 Chemistry Adsorption MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which one of the following characteristics is associated with adsorption?
A
ΔG and ΔH are negative, ΔS is positive.
B
ΔG and ΔS are negative, ΔH is positive.
C
ΔG is negative but ΔH and ΔS are positive.
D
ΔG, ΔH and ΔS all are negative.
Correct Answer
Option A
Detailed Explanation
Adsorption is an exothermic process, so ΔH is negative. The randomness decreases at the solid surface, making ΔS negative. For a spontaneous process, ΔG must be negative.
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