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Question

In dialysis, colloidal particles are separated from

A
Solvent
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B
Dispersed phase
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C
Dissolved ions or molecules
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D
Particles of dispersion medium
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Solution

The correct option is C Dissolved ions or molecules
Colloidal sols, prepared ​by various methods​ are impure and contain impurities of electrolytes and other soluble substances.​

One of the important method of removal ​of soluble impurities​ is dialysis.

Dialysis is a process of removing a dissolved substance from a colloidal solution​ by means of diffusion through a suitable membrane​.

Animal membrane (bladder) or parchment paper or cellophane ​
sheet is used​ as the membrane of separation. Here, ions or small molecules passes through the membrane, but not the ​colloidal particles​.

The apparatus used ​is known as​ dialyser

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