Q.

Statement 1: The micelle formed by sodium stearate in water has -COO– groups at the surface.Statement 2: Surface tension of water is reduced by the addition of stearate.

Moderate

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Both statements 1 and 2 are correct.

Statement 1 is correct and statement 2 is incorrect.

Statement 1 is incorrect and statement 2 is correct.

Both Statements 1 and 2 are incorrect.

answer is 1.

(Detailed Solution Below)

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Detailed Solution

Micelle is formed if molecules with polar and non-polar ends assemble in bulk to give non-polar interior and polar exterior.it is true that due to the addition of stearate, the surface tension of water reduces. The stearate ions replace some of the water molecules at the surface. As a result, the contraction forces at the surface are reduced and surface tension decreases.

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