Q.

Concentration of sodium stearate is increased from 10-5M to 0.0015M then its Osmotic pressure (T is constant)

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Increases

Decreases

Remains constant

can not be predicted

answer is B.

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Detailed Solution

Osmatic pressure = CRTAs Molarity increases, Osmotic pressure must increasesBut CMC of sodium stearate is 10-4to 10-3MSo when concentration increases from 10-5 to 1.5 X 10-3M, it forms Associate micelles.As number of particles decreases, Osmotic pressure decreases

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