Question

define combustion and explosion
please help me! it's urgentttt​

Answer 1

Combustion: Combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. 

Explosion: Explosion is a violent shattering or blowing apart of something, as is caused by a bomb.

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Answer 2

Combustion ⟹

It is a process when something burns.

Explosion ⟹

It is a process when a object burns by producing heat and sound.