Q. The principal emulsifying agent for O/W emulsions is/are _.

A
Lamp black
B
Long chain alcohols
C
Natural and synthetic soaps
D
Heavy metal salts of fatty acids
Solution:
  • When oil and water are mixed powerfully, they form either oil-in-water (o/w) or water-in-oil (w/o) emulsions.
  • In o/w emulsions, oil is dispersed in a continuous water phase.
  • The principal emulsifying agent for o/w emulsion is lampblack or soot.
  • Other emulsifying agents are the heavy metal salts of the fatty acids, long-chain alcohols, etc.
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