Question

Which of the following are correct with respect to carbon monoxide?
(i) It is released due to incomplete combustion of fuels.
(ii) It does not affect humans.
(iii) It is a toxic gas.
(iv) It reduces oxygen-carrying capacity of the blood.
​(v) It is released from vehicles.

• A. (i), (iii), (iv) and (v)
• B. (i), (ii) and (v)
• C. (i), (iv) and (v)
• D. (ii) and (v)

Answer 1

The correct option is A

(i), (iii), (iv) and (v)

Carbon monoxide (CO) is released due to incomplete combustion of carbon-based fuels. It is a toxic gas and large concentrations of it on inhalation reduce the oxygen-carrying capacity of blood. The incomplete combustion process that occurs in engines of automobiles, results in the emission of carbon monoxide (CO) as a waste product. Hence, automobiles are a major contributor.