Question

what happen when there is incomplete combustion?​

Answer 1

Answer:

Incomplete combustion occurs when there isn't enough oxygen to allow the fuel to react completely with the oxygen to produce carbon dioxide and water, and also when the combustion is quenched by a heat sink such as a solid surface or flame trap.

Since you haven't provided any further information about question , my final answer is just the combustion remains incomplete.

Answer 2

Hey mate here is your answer.

Incomplete combustion occurs when there isn't enough oxygen to allow the fuel to react completely with the oxygen to produce carbon dioxide and water.