Question

Sedimentation potential is the reverse of
A.Electro osmosis
B.Electrophoresis
C.Electrokinetic potential
D.Streaming potential

Answer 1

To answer this question, you should recall the concept of sedimentation potential and electrophoresis. Sedimentation potential involves the movement of dispersed particles under the influence of either gravity or centrifugation in a medium

Complete Step by step solution:
The phenomenon of movement of colloidal particles under an applied electric field is called electrophoresis. If the particles accumulate near the negative electrode, the charge on the particles is positive. On the other hand, if the sol particles accumulate near the positive electrode, the charge on the particles is negative. The reverse of electrophoresis is called Sedimentation potential.
The sedimentation potential is set up when a particle is forced to move in a resting liquid. Sedimentation potential involves the movement of dispersed particles under the influence of either gravity or centrifugation in a medium whereas the electrophoresis is the movement of dispersed phase particles under the influence of electric potential.

Hence, the correct option is option B

Note: You should note that the electrical properties of colloids. According to electrical double layer theory, a double layer of ions appears at the surface of solid. The ion preferentially adsorbed is held in fixed part and imparts a charge to colloidal particles. The second part consists of a diffuse mobile layer of ions. This second layer consists of both the type of charges. The net charge on the second layer is exactly equal to that on the fixed part. The existence of opposite sign on fixed and diffuse parts of the double layer leads to the appearance of a difference of potential, known as zeta potential or electrokinetic potential.