Question

Do substances actually burn in combustion reaction?​

Answer 1

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$\bold{\small{\color{red}{All\:substances\:may\:not\:burn\:in\:combustion\:reaction.}}}$

$\bold{\small{\color{green}{Explanation:}}}$

All substances may not burn in combustion reaction. These are basically oxidation and only those substances burn whose ignition temperature are low. It may be defined as the temperature at which a substance remain catch fire.