Chemical effects of electric current class 8th Science

1. What do you mean by gold plating?

2.What happens when electrodes are immersed in water and a current is passed?

3.Why tap water is always good conductors?

4.Explain the functioning of a LED.

5.Is it possible for an electric tester to detect weak current also, if no how can we detect weak current flowing in a circuit?

6.What do you mean by electrolysis and electrolytes?

7.In case of fire before the fireman used the water hoses, they shut off the main electrical supply of the area, why so?

8.In which case the compass needle will deflect more: by testing sea water or by testing drinking water?

9.Show that lemon juice and vinegar are good conductors of electricity.

10.The ordinary water can conduct electricity while distilled water does not. Explain why.

11. What is chemical effect of electricity? Give some examples of chemical effects.

12.Explain the process of electroplating, along with its advantages and uses.

13.Prepare a tester to test conduction based on magnetic effect of the electricity.