An example for hydrophobic sol among the following is

An example for hydrophobic sol among the following is
  1. gum solution
  2. arsenic sulphide solution
  3. starch solution
  4. protein solution

Solution

Arsenic sulphide solution \(\left(\mathrm{As}_2 \mathrm{~S}_3 \mathrm{~S}^{2-}\right)\) is a hydrophobic solution i.e. it has poor or zero affinity towards dispersion medium \(\left(\mathrm{H}_2 \mathrm{O}\right)\). Whereas, solution of gum, starch and protein are individually hydrophilic in nature as they are natural polymers (dispersed phase).

Asked in: AP EAMCET 2020 (18 Sep Shift 1)

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