Question

Which of the following is not an explanation for the origin of charge on the colloidal particles?

• A. Due to frictional electrification
• B. Due to dissociation of surface molecules
• C. Due to electrophoresis
• D. Due to selective adsorption of ions

Answer 1

The correct option is C Due to electrophoresis

• The movement of colloidal particles under an applied electric potential is called electrophoresis.
• Positively charged particles move towards the cathode while negatively charged move towards the anode.
• Here, by frictional electrification, the charge on the colloid can be explained and also dissociation of surface molecules creates the charged species. Selective adsorption of ions is also responsible for a charge on colloidal particles. Hence, option C is the right option.