Which of the following is not an example of separation by physical means?

Filtration

Decantation

Electrolysis

Evaporation

I believe the correct answer from the choices listed above is the third option. It is electrolysis that is not an example of separation by physical means. It is by chemical means. It is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through them.