Q152 · CSIR-NET Chemistry, December 2019
Paper: CSIR-NET December 2019 · Subject: Physical Chemistry · Chapter: Surface Chemistry · Topic: Surface Tension · Marks: 2 · Difficulty: Easy
The surface tension of dilute soap solution is lower than that of pure water because
(a)soap molecules accumulate more at the surface than in the bulk solution.
(b)soap molecules accumulate more in the bulk than on the surface.
(c)the soap molecules aggregate uniformly in the bulk and the surface.
(d)soap molecules form micellar structures at low concentration.
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Surfactant accumulates at the surface (positive surface excess), lowering γ (a).
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