Which of the following statements is true about zone electrophoresis?
Zone electrophoresis is a type of paper chromatography technique.
Zone electrophoresis is used to separate colloidal particles based on their size.
Zone electrophoresis is used to separate colloidal particles based on their charge.
None of the above.
Correct Option (3) ) Zone electrophoresis is used to separate colloidal particles based on their charge.
Zone electrophoresis is a technique used to separate charged molecules or particles based on their electrophoretic mobility. The sample is applied as a thin layer on a support medium, such as a gel or paper strip, and is then subjected to an electric field. The sample will migrate and separate into different zones based on their mobility. Therefore, statement 3 is true. However, statement 1 is false because zone electrophoresis is not a type of paper chromatography technique. Thus, statement 2 is also false. Therefore, the correct answer is 3.