Introduction to Chemical Reactions

What are the substances called that undergo transformations in a chemical reaction?

• Reactants

• Products

• Catalysts

• Inhibitors

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

• Formation of water from hydrogen and oxygen

• Burning of methane

• Decomposition of water into hydrogen and oxygen

• Rusting of iron

What type of reaction involves a fuel reacting with oxygen to produce carbon dioxide and water?

• Combustion reaction

• Synthesis reaction

• Single replacement reaction

• Decomposition reaction

In an exothermic reaction, what happens to energy?

• It is released more than it is absorbed

• It is absorbed more than it is released

• It remains constant

• It is neither absorbed nor released

What fundamental concept states that no new atoms are created or destroyed in a chemical reaction?

• Conservation of mass

• Conservation of energy

• Law of definite proportions

• Law of multiple proportions