What is meant by electrolytic refining? Give example.

Explain electrolytic refining.

What is meant by error in measurements ? Give an example.

What is meant by dimensional equation ? Give an example.

What is gel ? Give examples.

What is sol ? Give example.

(a) Describe electrophoresis with the help of a diagram. (b) What is meant by shape selective catalysis ? Give an example of shape selective catalyst.