Question

multiple - choice question
the \waste\ products of combustion is/are ______.
carbon dioxide and water
energy
rewatch

Explanation:

Combustion is a chemical reaction. For example, when a hydrocarbon (like methane \(CH_4\)) burns in oxygen (\(O_2\)), the reaction is \(CH_4 + 2O_2
ightarrow CO_2+2H_2O\). Carbon dioxide (\(CO_2\)) and water (\(H_2O\)) are the products that are not used as fuel anymore (waste products in the sense of the fuel's energy - release process). Energy is released during combustion (it is a by - product in terms of energy transfer, but not a 'waste' product in the chemical sense of unused chemical substances from the reactants).

Answer:

carbon dioxide and water