Question

Incomplete burning might take place when -

• A. Charcoal has no volatile compounds in it.
• B. Charcoal is black.
• C. Charcoal is artificially made.
• D. Charcoal is a gaseous fuel.

Answer 1

The correct option is D

Charcoal is a gaseous fuel.

Incomplete burning might take place when there is a limited supply of oxyge or when the fuel has components which just don't burn. When there are non-inflammable components, they will not burn and will result in ash or suspended particles.

If the oxygen supply is limited, the entire fuel may not get used up an some parts will remain unburnt.