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Question

Pick out the bad conductor of electricity from the following:

A
copper
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B
steel
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C
impure water
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D
air
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Solution

The correct option is D air
Copper and steel are metals and metals are good conductors of electricity. Impure water contains ions that conduct electricity.
However, the air is a mixture of gases and they are bad conductors of electricity. So air is a poor conductor of electricity

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