The incomplete combustion in automobile IC engines results in emission of ___

The incomplete combustion in automobile IC engines results in emission of ________

Option:

a. Nitrogen oxide (NO_x)
b. Carbon monoxide (CO)
c. Sulfur oxide (SO_x)
d. none of the above

Correct Answer : b. Carbon monoxide (CO)

Explanation:

Carbon monoxide is the product of incomplete combustion in IC engine. It is produces by the partial oxidation of carbon containing compounds. Generally in combustion process carbon dioxide(CO₂) is formed after combustion. But when there is not enough oxygen for the combustion process Carbon monoxide (CO) forms, that is incomplete combustion. Carbon monoxide (CO) reduces the ability to carry oxygen in the blood. At high concentration it may causes to death.

When nitrogen in air reacts with oxygen at high temperature and pressure in the IC engine, Nitrogen oxide (NO_x) forms. It causes to forming of smog and acid rain. When engine is operating in most efficient part the production of Nitrogen oxide (NO_x) increases. Nitrogen oxide (NO_x) is the mixture of NO, NO₂, N₂O in which NO₂ is more reactive.

Sulfur oxide (SO_x) is produced from burning of fuel containing sulfur.