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Question

Assertion :For adsorption ΔG,ΔH,ΔS all have negative values. Reason: Adsorption is a spontaneous exothermic process in which randomness decreases due to force of attraction between adsorbent and adsorbate.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
For adsorption G, H, S all have negative values.
Adsorption is a spontaneous exothermic process (hence ΔH is negative) in which randomness decreases due to force of attraction between adsorbent and adsorbate (hence, ΔS is negative).
Due to this ΔG=ΔHTΔS is negative.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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