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.