Question

Consider the following chemical emulsions:

Which of the above chemical emulsion is/are used to minimize the loss of water through the process of evaporation?

• A. 1 only
• B. 1 and 4
• C. 2 and 4
• D. 2 and 3

Answer 1

The correct option is D 2 and 3

Certain chemicals such as cetyl alcohol (hexadecanol) and stearyl alcohol (octadecanol) form monomolecular layers on a water surface. These layers act as evaporation inhibitors by preventing the water molecules to escape past them.