The movement of colloidal particles from a colloidal solution, under the influence of applied electric potential towards one or the other electrode is called
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Electrophoresis
Electrophoresis is the movement of colloidal particles towards one or the other electrode under an applied electric potential. Positively charged particles move towards the cathode and negatively charged ones towards the anode, which also shows the sign of the charge on a sol.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Electrophoresis
