Multiple choice

Which of the following gases is mainly produced by coal when it is heated in sufficient supply of air?

  1. Oxygen

  2. Carbon-dioxide

  3. Carbon-monoxide

  4. Nitrogen

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Complete combustion of the fuel takes place when heated in sufficient supply of air. Combustion of carbon based fuel results in the release of carbon dioxide along with large amount of heat energy.