Multiple choice

Which of the following statements is true?

  1. Colloidal particles can be seen with naked eye.

  2. Electro-osmosis is the migration of colloidal particles towards oppositely charged electrodes under the influence of applied electric field.

  3. Dialysis is the separation of soluble impurities from a colloidal solution on the basis of their different rates of diffusion through semipermeable membrane.

  4. Gold number gives the amount of gold required to protect the colloid.

  5. Flocculation is the phenomenon of the precipitation of a colloidal solution by application of electric field.
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C Correct answer
Explanation

The separation of soluble impurities from a colloidal solution on the basis of their different rates of diffusion through parchment paper (semipermeable membrane) is called dialysis.

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