The Brownian motion is due to:

Temperature fluctuation within the liquid phase

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Impact of the molecules of the dispersion medium on the colloidal particles

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Convectional current

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Attraction and repulsion between charges on the colloidal particles

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Solution

The correct option is B Impact of the molecules of the dispersion medium on the colloidal particles
Brownian motion is the random movement of the low weight particles suspended in a fluid.

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