Question

Incomplete burning will 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.

If oxygen supply is limited, it will result in unburnt suspended particles in product gases which do not get oxygen to react with. When there are non-inflammable impurities, they will not burn and will result in ash or suspended particles.