Which of the following does not involve a combustion reaction?

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production of heat and light from hydrogen in the sun

production of heat and light from kerosene in a lantern

production of heat and light from wood in a bonfire

production of heat and light from hydrogen in a rocket

answer is C.

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Detailed Solution

A combustion reaction is defined as a reaction in which a substance reacts with oxygen (O₂), usually producing heat and light, and forming CO₂ and H₂O (for hydrocarbons or organic compounds).

Examples of combustion:
- Burning of methane: CH₄ + 2O₂ → CO₂ + 2H₂O
- Burning of carbon: C + O₂ → CO₂
A reaction that does not involve oxygen or does not produce typical combustion products is not a combustion reaction.

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