Question

Which amongst the following gas is formed during the incomplete combustion of carbon?

• A. Carbon dioxide
• B. Carbon monoxide
• C. Ozone
• D. Oxygen

Answer 1

The correct option is B

Carbon monoxide

When carbon undergoes complete combustion, in the presence of oxygen, carbon dioxide $\left(C{O}_2\right)$ is produced. However, if the relative amount of carbon increases or that of oxygen decreases, the reaction takes place as given below:

$2C\left(s\right)+O_2\left(g\right)\to 2CO\left(g\right)$

This is called incomplete combustion of carbon. The gas formed during this is carbon monoxide$\left(CO\right)$, a poisonous gas.