Question

Which of the following will be released during combustion of fossil fuels?

• A. Carbon dioxide
• B. Oxide of nitrogen
• C. Carbon monoxide
• D. All of the above

Answer 1

The correct option is D All of the above

The fossil fuels are coal, oil and natural gas. When fossil fuels are burned, they release nitrogen oxides into the atmosphere, which contribute to the formation of smog and acid rain. Burning of natural gas produces nitrogen oxides and carbon dioxide, but in lower quantities than burning coal or oil. When coal is burned, carbon dioxide, sulfur dioxide, nitrogen oxides and mercury compounds are released. Burning oil at power plants produces nitrogen oxides, sulfur dioxide, carbon dioxide, methane and mercury compounds. Carbon monoxide is released when car engines burn fossil fuels.