Understanding Combustion Reactions Quiz

What are the typical products of a complete combustion reaction involving a hydrocarbon?

• Carbon monoxide and water

• Carbon dioxide and water

• Carbon and hydrogen gas

• Oxygen and carbon monoxide

Which gas is always a reactant in a combustion reaction?

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What is a distinguishing feature of incomplete combustion?

• No soot is produced

• Only water is produced

• Carbon monoxide and black soot are produced

• Only carbon dioxide is produced

Which of the following is a safer product of combustion for humans?

• Carbon monoxide

• Carbon dioxide

• Black soot

• Methane

Which of the following best describes the first step in balancing a combustion reaction?

• Balance the oxygen atoms first

• Balance the carbon and hydrogen atoms first

• Balance the products first

• Balance the equation by trial and error

Why is incomplete combustion considered "dirty" compared to complete combustion?

• It produces more water

• It produces carbon monoxide and soot

• It uses less oxygen

• It produces only carbon dioxide

Which of the following is an application of combustion reactions in everyday life?

• Photosynthesis in plants

• Burning wood for heat

• Dissolving salt in water

• Freezing water

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NGSS.MS-PS1-5

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NGSS.MS-PS1-5

• Balance the carbon atoms again

• Balance the oxygen atoms

• Add more ethane

• Remove water

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• 3

• 4

• 5

• 6

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