Here's why:
* Combustion is a chemical process involving a rapid reaction between a substance with an oxidant, producing heat and light.
* Oxidant is a substance that accepts electrons during a chemical reaction. Oxygen is a powerful oxidant, but not the only one.
* Other oxidants include fluorine, chlorine, and even some compounds like nitric acid.
Examples:
* Burning wood: This is a classic example of combustion with oxygen as the oxidant.
* Burning magnesium in chlorine gas: This reaction produces magnesium chloride with a bright white light and heat, demonstrating combustion without oxygen.
Therefore, while oxygen is the most common oxidant for combustion, it is not a requirement. Other substances can act as oxidants in combustion reactions.
