Which of the following is not necessary for combustion to take place?

Fuel

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Carbon dioxide

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Oxygen

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Heat

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Solution

The correct option is B Carbon dioxide
Combustion is a chemical process in which a substance reacts with oxygen to generate heat. Factors that support combustion are:
- Presence of a combustible substance
- Supply of oxygen
- High ignition temperature
Carbon dioxide is not a supporter of combustion.

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