Combustion Reactions

What is the main difference between complete and incomplete combustion?

• Complete combustion requires a catalyst.

• Incomplete combustion produces more energy.

• Complete combustion produces carbon dioxide, while incomplete combustion produces carbon monoxide.

• Incomplete combustion requires more oxygen.

What is the role of oxygen in a combustion reaction?

• It acts as a fuel.

• It acts as a reducing agent.

• It acts as an oxidising agent.

• It acts as a catalyst.

Which of the following statements is true about the energy changes in combustion?

• Energy is absorbed from the surroundings.

• Energy is released to the surroundings.

• Energy remains constant.

• Energy is converted into mass.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

In the context of combustion, what does the term "oxidation" refer to?

• Loss of oxygen.

• Gain of hydrogen.

• Gain of oxygen.

• Loss of carbon.

Incomplete combustion is harmful to humans because it ___________________.

• increases the level of sugar in the blood

• produces large amounts of carbon dioxide

• decreases the amount of sugar in the blood

• produces carbon monoxide that reduces the level of oxygen in the blood

The word equation for combustion is: fuel + oxygen --> water + ________ __________

• Carbon dioxide

• Limewater

Tags

NGSS.MS-PS1-5

Which of the following is a consequence of incomplete combustion?

• Production of carbon dioxide.

• Production of carbon monoxide.

• Production of water only.

• Production of nitrogen gas.

propane + oxygen --> carbon + water + carbon monoxide

• complete combustion

• incomplete combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

methane + oxygen --> carbon dioxide + water

• complete combustion

• incomplete combustion

Tags

NGSS.MS-PS1-5

If a flame is giving off smoke, this type of combustion is occurring...

• Complete combustion

• Incomplete combustion