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Question

Which of the following is NOT a good conductor of heat?

A
steel plate
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B
water
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C
iron rod
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D
copper wire
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Solution

The correct option is C water
Materials which conduct electricity or heat nicely are known as good conductors. Others are known as bad conductors. A good conductor usually has charged particles like electrons or ions in them. Copper, steel and iron being metals have free electrons available for conduction. Water is a non-metals and does not have free electrons for conduction. Hence it is a bad conductor.

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