Fill in the blanks.

1. Most liquids that conduct electricity are solutions of …………, ………. and …………..

2. The passage of an electric current through a solution causes ……………….. effects.

3. If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ……….. terminal of the battery.

4. The process of depositing a layer of any desired metal on another material by means of electricity is called …………