Describe with the help of a diagram an instrument which can be used to detect a charged body.

Describe electrophoresis with the help of a diagram.

Write the principle of working of a potentiometer. Describe briefly, with the help of circuit diagram, how a potentiometer is used to determine the internal resistance of a given cell.

Name the apparatus to detect the charge on a body.

Name the apparatus to detect charge on a body

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