Q. 4.When the solution is kept steady for some time the particles of colloid do not get collected at bottom but the suspended particles settle at bottom. Why? ____________________________________________________________
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Answer: The colloidal particles are smaller and not heavy. They always remain in a state of zig-zag motion, called Brownian movement, which counters the force of gravity acting on colloidal particles and hence, helps in providing stability to colloidal sols by not allowing them to settle down.
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When the solution is kept steady for some time the particles of colloid do not get
collected at bottom but the suspended particles settle at bottom. Why?
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