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Depression in Freezing Point

The average m...

Question

The average molar mass of colloidal particles is determined by :

A

Tyndall effect

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B

Osmotic pressure measurement

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C

Victor Maeyer's method

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D

None of the above

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Solution

The correct option is D Osmotic pressure measurement
The average molecular mass of colloidal particles can be determined by osmotic pressure.
Note: Colloidal particles are not simple molecules but a physical aggregation of molecules. For a given mass of sol, the number of particles will be very small and osmotic pressure will be very low.

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