Chemical Reactions Quiz

What is a chemical reaction?

• A process where a substance changes its physical state.

• A process where a chemical substance changes its chemical identity.

• A process where a substance changes its temperature.

• A process where a substance changes its color.

Which of the following is NOT an observable characteristic of a chemical reaction?

• Change in consistency

• Change in color

• Change in luster

• Change in taste

What type of reaction is represented by the equation A + B → AB?

• Single replacement reaction

• Double replacement reaction

• Combination reaction

• Decomposition reaction

In a single replacement reaction, what happens?

• Two elements combine to form a new compound.

• One element replaces another in a compound.

• Two compounds swap ions to form new compounds.

• A compound breaks down into simpler substances.

Which reaction involves the breakdown of a compound into simpler substances?

• Combination reaction

• Decomposition reaction

• Single replacement reaction

• Double replacement reaction

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

• Melting ice

• Dissolving salt in water

• Burning methane in oxygen

• Mixing vinegar and baking soda

What are the substances called before they react in a chemical reaction?

• Reactants

• Catalysts

• Products

• Inhibitors

What is the term for the substances formed as a result of a chemical reaction?

• Inhibitors

• Reactants

• Products

• Catalysts

What is the role of a catalyst in a chemical reaction?

• It changes the reactants of the reaction.

• It changes the products of the reaction.

• It speeds up the reaction.

• It slows down the reaction.

What is the effect of an inhibitor on a chemical reaction?

• It changes the products.

• It changes the reactants.

• It decreases the reaction rate.

• It increases the reaction rate.