Differentiate between good conductors and bad conductors along with the help of an example.

The water which we get from sources such as taps, hand pumps, well and ponds is good conductor of electricity. Why?

LED is used in a circuit. Explain why.

Name the factors on which chemical effects produced by an electric current depends.

How many types of electrodes are there is in a battery.

British chemist, William Nicholson had shown that if electrodes were immersed in water and a current was passed, bubbles of oxygen and hydrogen were produced. What do you understand by bubbles of hydrogen and oxygen?

Explain the reason of coating of one metal to another metal.

Electroplating is a very useful process. Explain how.