Which gas is colorless and odorless and produced during incomplete combustion of fuels?

The gas that is colorless and odorless and produced during incomplete combustion of fuels is carbon monoxide. This gas forms when there is not enough oxygen present for complete combustion to occur, leading to potentially dangerous conditions because it can accumulate and pose serious health risks.

Carbon monoxide binds with hemoglobin in the blood more effectively than oxygen does, thus preventing the body from getting enough oxygen. This characteristic makes carbon monoxide particularly hazardous, especially in enclosed or poorly ventilated spaces where combustion occurs, such as in vehicles, engines, or heating systems.

In contrast, carbon dioxide is a byproduct of complete combustion, and while it can be harmful in high concentrations, it is not created through incomplete combustion. Methane is a principal component of natural gas and is not formed during combustion processes but can be a fuel in its own right. Nitrogen dioxide, a different pollutant, arises primarily from the combustion of fossil fuels at high temperatures rather than being a direct product of incomplete fuel combustion.