Question

Which of the following is not a method to test the type of emulsion?

(a) Microscopic method

(b) Conductance method

(c) Coagulation method

(d) Dye method

This question was posed to me during an interview.

This interesting question is from Surface Chemistry in chapter Surface Chemistry of Chemistry – Class 12

Answer 1

The correct answer is (c) Coagulation method

Explanation: Coagulation or precipitation is a process of aggregating together the colloidal particles to change them into large-sized particles which ultimately settle as a precipitate. The different methods to test the type of emulsion are-microscopic, conductance and dye method.