Question

Testing of conductivity of certain liquids
Good conductor /
bad conductor
S.No
Liquid
LED glows Yes/No
1
O IN
3
Distilled water
Drinking water
Coconut oil
Lemon juice
Vinegar
5
6
Kerosene
7
Vegetable oil
Sugar solution
8
9
Palm oil​

Answer 1

Answer:

Your elders might have cautioned you against touching an electrical appliance with wet hands. But do you know why it is dangerous to touch an electrical appliance with wet hands?

We have learnt earlier that the materials, which allow electric current to pass through them, are good conductors of electricity. On the other hand, materials, which do not allow electric current to pass through them easily, are poor conductors of electricity.

In Class VI, we made a tester (Fig.1) to test whether a particular material allows the electric current to pass through it or not. Do you recall how the tester helped us in deciding that?

We found that metals such as copper and aluminium conduct electricity whereas materials such as rubber, plastic and wood do not conduct electricity. However, so far we have used our tester to test materials which were in solid state. But what about liquids.

Answer 2

Explanation:

led glows in drinking water,lemon juice andvinegar similarly,these thingsare good conductor of electricity

distilled water, coconut oil, kerosene, vegetable oil, sugar solution and palm oil are bod conductor of electricity