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JEE Main 202225 JulyEvening Shift
Exam
JEE Main
Year
2022
Date
25 July
Shift
Evening Shift
Subject
Chemistry
Chapter
Surface Chemistry

JEE Main 2022 · 25 July · Evening Shift · Chemistry · Surface Chemistry

For micelle formation, which of the following statements are...

For micelle formation, which of the following statements are correct?

(A) Micelle formation is an exothermic process.

(B) Micelle formation is an endothermic process.

(C) The entropy change is positive.

(D) The entropy change is negative.

Options

  1. AA and DA \text{ and } D only
  2. BA and CA \text{ and } C only
  3. CB and CB \text{ and } C only
  4. DB and DB \text{ and } D only

Correct answer

C. B and CB \text{ and } C only

Step-by-step solution

For micelle formation, ΔS>0\Delta S > 0 (hydrophobic effect).

This is possible because, the decrease in entropy due to clustering is offset by increase in entropy due to desolvation of the surfactant.

Also ΔH>0\Delta H > 0

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