Question

Which of the following statements is NOT true regarding oil in water emulsion?

• A. The oil is dispersed phase and water is dispersion medium.
• B. If water is added, it will be miscible with the emulsion.
• C. The addition of a small amount of an electrolyte has no effect on conducting power.
• D. Water is a continuous phase.

Hint:

Water is the continuous phase, so added ions make the emulsion conduct better.

Answer 1

The Correct Option is C

Step 1: Elimination
The first, second and fourth statements all describe water as the continuous phase, which is correct for an oil in water emulsion.

Step 2: Remaining statement
An aqueous continuous phase conducts electricity through ions.
Adding an electrolyte raises the ion content and hence the conductivity.

Step 3: Conclusion
The third statement is the one that is not true.

Final Answer:
The third statement is the incorrect one. \[ \boxed{\text{(C) }\text{The addition of a small amount of an electrolyte has no effect on conducting power.}} \]