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100

Who is the French chemist credited with the discovery when he described the principles of mass or matter conservation?

A. Isaac Newton

B. Antoine Lavoisier

C. Dmitri Mendeleev

D. Robert Hooke

B. Antoine Lavoisier

200

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

A. It slows down the reaction.

B. It increases the amount of products formed.

C. It increases the temperature of the reaction.

D. It speeds up the reaction without being consumed.

D. It speeds up the reaction without being consumed.

300

Which change will most likely increase the rate of a chemical reaction? 

A. Lowering the temperature
B. Increasing the temperature
C. Removing the reactants
D. Decreasing the pressure

B. Increasing the temperature

400

Why does powdered calcium carbonate react faster with hydrochloric acid than a large marble chip?

A. It contains more atoms.

B. It is a different substance.

C. It has a higher temperature.

D. It has a larger surface area exposed to the acid.

D. It has a larger surface area exposed to the acid.

500

Based on the equation below, which of the following compounds is a reactant?

C₆H₁₂O₆ + 6O₂ ---> 6CO₂ + 6 H₂O

wood + Oxygen gas ---> carbon dioxide + water

A. Carbon dioxide

B. Wood

C. Water

D. Wood and water

B. Wood