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Give reasons. Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

5. Give reasons.

(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

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Paper has a low ignition temperature and hence catches fire easily. But when it is wrapped around an aluminium pipe, heat is transferred to the metal and hence the ignition temperature of the paper is not reached. That is why paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

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