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Q.

Which of the following statements regarding sols is not correct?

 

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a

Brownian movement stablises sols

b

In a reaction, catalyst may change qualitatively as well as physically.

c

An emulsion can be broken both by heating as well as freezing.

d

On prolonged dialysis, colloids become stable

answer is D.

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Detailed Solution

The presence of a little quantity of the electrolytes is what gives a colloidal sol its stability. The electrolytes are all eliminated during persistent dialysis. As a result, the colloidal sol coagulates and loses its stability.

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