Understanding Chemical Reaction Types (5)

Which of the following best describes a synthesis reaction?

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

• Two or more substances combine to form a single new substance.

• An element replaces another element in a compound.

• A reaction that produces only gases.

What is a decomposition reaction?

• Two elements combine to form a compound.

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

• An element replaces another element in a compound.

• Two compounds exchange ions.

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

• Synthesis

• Decomposition

• Displacement

• Combustion

In a displacement reaction, what happens?

• Two elements combine to form a compound.

• A compound breaks down into elements.

• An element replaces another element in a compound.

• Two compounds exchange ions.

Which of the following is a decomposition reaction?

• Synthesis

• Decomposition

• Displacement

• Neutralisation

Which of the following best describes how atoms are rearranged in a synthesis reaction?

• Atoms are split apart into smaller pieces.

• Atoms from two or more reactants combine to form a single product.

• Atoms are exchanged between two compounds.

• Atoms are lost from the system.

Which of the following is NOT a characteristic of a decomposition reaction?

• One reactant

• Two or more products

• Two reactants

• Breaking down of a compound

Which of the following equations represents a displacement reaction?