Question

Which of the following is a gas released by the usage of petroleum and coal but not poisonous?

• A. Carbon Monoxide
• B. Sulfur Dioxide
• C. Carbon Dioxide
• D. Nitrogen Oxide

Answer 1

The correct option is C

Carbon Dioxide

During burning of fossil fuels (coal and petroleum) carbon monoxide, sulphur dioxide, carbon dioxide and nitrogen oxide are released. But out of these gases, carbon dioxide is non-poisonous. Though an excess concentration of carbon dioxide in atmosphere is not desirable as it is a greenhouse gas but it is not poisonous in nature.