Combustion P3L3,U11,AC2.2.

What type of reaction is combustion known as?

• Endothermic

• Exothermic

• Neutral

• Acidic

What form of energy is produced during complete combustion?

• Heat and Electricity

• Light and Electricity

• Heat and Light

• Sound and Heat

What is the percentage of oxygen in air?

• 10%

• 20%

• 30%

• 40%

What is produced when natural gas undergoes complete combustion?

• CO and H2O

• CO2 and 2H2O

• CO2 and O2

• CO and O2

What is produced when natural gas undergoes incomplete combustion?

• CO2 and H2O

• CO and O2

• CO and H2O

• CO2 and O2