Multiple choice

The colloids having aggregates held by Van der Waal forces are:

  1. multimolecular colloids

  2. macromolecular colloids

  3. lyophobic colloids

  4. associated colloids
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A Correct answer
Explanation

In this type of colloids, the colloidal particles are aggregates of atoms or small molecules with molecular size less than one nanometer (1 nm). For e.g., gold sol consists of particles of various sizes which are clusters of several gold atoms. Similarly, sulphur sol consists of colloidal particles which are aggregates of S8 molecules. The molecules in the aggregates are held together by Van der Waal forces.

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