Chemical Reactions Quiz

What is a synthesis (combination) reaction?

• Two or more substances combine to form a single product.

• A single compound breaks down into two or more simpler substances.

• A reaction that absorbs heat.

• A reaction that releases light.

Tags

NGSS.MS-PS1-5

What is the general formula for a decomposition reaction?

• A + B → AB

• AB → A + B

• A + B → C

• AB + C → AC + B

Which of the following is an example of a synthesis reaction?

• Formation of water

• Decomposition of calcium carbonate

• Melting of ice

• Boiling of water

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What happens in a decomposition reaction?

• Two or more substances combine to form a single product.

• A single compound breaks down into two or more simpler substances.

• A reaction that absorbs heat.

• A reaction that releases light.

What is the example given for a decomposition reaction?

• Formation of water

• Decomposition of calcium carbonate

• Combustion of wood

• Rusting of iron

What happens in a single replacement (displacement) reaction?

• An element replaces another element in a compound.

• Two elements combine to form a new compound.

• A compound breaks down into two elements.

• Two compounds exchange ions to form new compounds.

What is the general formula for a single replacement reaction?

• A + BC → AC + B

• AB + CD → AD + CB

• A + B → AB

• AB → A + B

In a double replacement (displacement) reaction, what occurs?

• Exchange of ions between two compounds to form new compounds.

• An element replaces another element in a compound.

• A compound breaks down into simpler substances.

• Two elements combine to form a new compound.

What is the general formula for a double replacement reaction?

• AB + CD → AD + CB

• A + BC → AC + B

• A + B → AB

• AB → A + B

What is released when a substance reacts with oxygen in a combustion reaction?

• Water and light

• Energy in the form of heat and light

• Carbon dioxide and nitrogen

• Oxygen and hydrogen

Tags

NGSS.HS-PS1-4