Question

2. When a fossil fuel burns in an insufficient amount of air,_____;________ is formed.​

Answer 1

Explanation:

Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. The carbon is released as soot . Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.