Test to prove that liquid conduct …

Aim: To test whether a given liquid conducts electricity or not. Things required: A dry cell, pieces of copper wire, two iron nails, a rubber cork, a bulb fixed in a bulb holder, a beaker, lemon juice, vinegar, tap water, dilute hydrochloric acid, dilute potassium hydroxide, alcohol, kerosene and mustard oil. Method: 1. Take two iron nails and fix them on a rubber cork. 2. Take a beaker and place the rubber cork having the iron nails. Make a circuit by connecting a bulb, a switch, a cell using copper wire and iron nails. This is your electric tester. 3. Pour lemon juice in the beaker carefully. Now pass the electric current through the lemon juice by closing the switch. You observe that the bulb glows showing that lemon juice is a good conductor of electricity. 4. Repeat the activity one by one with other liquids. Wash, wipe and dry the ends of electric tester after testing each liquid.