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Particles of a colloidal solution do not settle down but particles of suspension settle because particles of suspension are heavier as compared to particles of colloidal solution when left undisturbed.
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heya!!! here's your answer!!!
The size of the colloidal particles though is bigger than particles of true solutions, but is smaller than the size of suspension. We know that the particles in a colloid show continuous random zigzag motion called brownian motion. This brownian motion counters the force of gravity acting on colloidal particles and helps in providing stability to colloidal sols by not allowing them to settle. The fact that colloidal particles are charged and repel each other also contributes to colloidal particles not settling down, even after being left undisturbed for a long time.
The size of the colloidal particles though is bigger than particles of true solutions, but is smaller than the size of suspension. We know that the particles in a colloid show continuous random zigzag motion called brownian motion. This brownian motion counters the force of gravity acting on colloidal particles and helps in providing stability to colloidal sols by not allowing them to settle. The fact that colloidal particles are charged and repel each other also contributes to colloidal particles not settling down, even after being left undisturbed for a long time.
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