A drop of a water-soluble dye is added to an emulsion and it colours the whole emulsion uniformly. The emulsion is of the type:

Aoil in water
Bsolid in liquid
Cwater in oil
Dgas in liquid

Answer: A

A water-soluble dye colours only the aqueous phase. If it spreads through the entire emulsion, water must be the continuous phase, so the emulsion is oil in water.

Practice Surface Chemistry More on Emulsions and gels

Previous questionNext question

More questions on Emulsions and gels

Milk is a colloidal system of the type: NEET level
A gel is a colloidal system in which: NEET level
Which of the following can act as an emulsifying agent to stabilise an oil-in-water emulsion? NEET level
The slow oozing out of liquid from a gel on standing is called: NEET level
An emulsion mixes readily with water in all proportions and conducts electric current well when electrodes are dipped in it. It is most like... JEE Main level
Which of the following would NOT help in breaking (demulsifying) an emulsion? JEE Main level