Question

Incomplete burning of fuels produces ___________ which is a _________ gas.

• A. Carbon monoxide
• B. poisonous

Answer 1

Carbon monoxide:

• The incomplete burning of fossil fuels such as petrol and diesel leads to the formation of carbon monoxide($\mathrm{CO}$).
• Carbon monoxide is a highly poisonous gas. When inhaled, it combines with the hemoglobin present in the blood to form a stable compound called carboxyhemoglobin.
• This lowers the oxygen-carrying capacity of the blood.
• Breathing in carbon monoxide causes headache, and dizziness and can even lead to death.

Therefore, incomplete burning of fuels produces carbon monoxide which is a poisonous.