Every substance has to be heated to a minimum temperature in order for the combustion process to start, this temperature is known as __ temperature.

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Solution

We in our everyday life observe that not everything starts burning at the same temperature. Some substances start burning at a higher temperature, while some substances start burning at a lower temperature.

This minimum temperature needed for a substance to just start the process of combustion is known as the ignition temperature.

For example, ignition temperature of charcoal is $349^{\circ}$ C

Ignition temperature of hydrogen is around $500^{\circ}$ C

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