Which of the following is a lyophobic colloidal solution?

Which of the following is a lyophobic colloidal solution?
  1. Aqueous starch solution
  2. Aqueous protein solution
  3. Gold sol
  4. Polymer solutions in some organic solvents

Solution

Gold sol is a lyophobic sol. Gold particles have very less affinity towards dispersion medium, hence its sol can be easily coagulated.

Asked in: AP EAMCET 2004

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