A product of complete combustion or organic materials.

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Multiple Choice

A product of complete combustion or organic materials.

Explanation:
Complete combustion of organic materials involves burning with plenty of oxygen so that all carbon becomes carbon dioxide and all hydrogen becomes water. The telltale product of this full oxidation is carbon dioxide, produced alongside water, as shown in the simple example CH4 + 2 O2 → CO2 + 2 H2O. Methane is a fuel that can undergo this reaction, but it is not a product. Oxygen is a reactant, not a product. Nitrogen from the air largely stays as N2 unless extreme conditions push some NOx formation, which is a different phenomenon. So carbon dioxide is the product formed when organic material undergoes complete combustion.

Complete combustion of organic materials involves burning with plenty of oxygen so that all carbon becomes carbon dioxide and all hydrogen becomes water. The telltale product of this full oxidation is carbon dioxide, produced alongside water, as shown in the simple example CH4 + 2 O2 → CO2 + 2 H2O. Methane is a fuel that can undergo this reaction, but it is not a product. Oxygen is a reactant, not a product. Nitrogen from the air largely stays as N2 unless extreme conditions push some NOx formation, which is a different phenomenon. So carbon dioxide is the product formed when organic material undergoes complete combustion.

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