Chemistry Reactions Quiz

What is the fundamental skill in chemistry that ensures the law of conservation of mass is upheld?

• Balancing chemical equations

• Measuring pH levels

• Identifying chemical bonds

• Calculating molar mass

Tags

NGSS.HS-PS1-7

What does the law of conservation of mass state?

• Matter can be created or destroyed in a chemical reaction.

• Matter cannot be created or destroyed in a chemical reaction.

• Energy can be created or destroyed in a chemical reaction.

• Atoms can change into different elements in a chemical reaction.

Tags

NGSS.HS-PS1-7

Which type of reaction involves breaking down a compound into simpler substances?

• Synthesis Reaction

• Decomposition Reaction

• Single Replacement Reaction

• Double Replacement Reaction

In a single replacement reaction, what happens?

• Two elements combine to form a compound.

• A compound breaks down into simpler substances.

• One element replaces another in a compound.

• Ions are exchanged between two compounds.

What occurs in a double replacement reaction?

• Two elements combine to form a compound.

• A compound breaks down into simpler substances.

• One element replaces another in a compound.

• Ions are exchanged between two compounds.

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

• A + B → AB

• AB → A + B

• AB + C → AC + B

• AB + CD → AD + CB

Which of the following is an example of a single replacement reaction?

• A + B → AB

• AB → A + B

• AB + C → AC + B

• AB + CD → AD + CB

Which of the following is an example of a double replacement reaction?

• A + B → AB

• AB → A + B

• AB + C → AC + B

• AB + CD → AD + CB

What must be the same on both sides of a balanced chemical equation?

• The number of molecules

• The number of atoms for each element

• The number of compounds

• The number of ions

Tags

NGSS.HS-PS1-7

What are the substances called that start a chemical reaction?

• Products

• Reactants

• Catalysts

• Inhibitors