Question

Give Reason: Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminum pipe does not.

Answer 1

Ignition temperature

1. The lowest temperature at which a substance catches fire is called ignition temperature.
2. A substance cannot catch fire unless it reaches its initial temperature.
3. The Ignition temperature of paper is low, so it catches fire easily.
4. Whereas when a paper is wrapped around aluminum pipe the ignition temperature increases so it does not catch fire easily.
5. This happens because aluminium is a metal, As a result it is a very good conductor of heat and when tries to burn, it absorbs all the heat energy
6. Therefore, due to aluminium being a good conductor of heat, when the paper is wrapped around it does not catch fire.