Chemical Reactions Quiz

What is the main difference between physical and chemical changes?

• Change in state

• Change in identity

• Change in color

• Change in temperature

Which of the following is an observation that indicates a chemical change?

• Evolution of a gas

• Change in temperature

• Change in state

• Change in color

What is the symbolic representation of a chemical reaction?

• Chemical compound

• Chemical formula

• Chemical equation

• Chemical mixture

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

• Products

• Reactants

• Catalysts

• Intermediates

What is the process of making a chemical equation more concise by using chemical formulae instead of words called?

• Substitution

• Simplification

• Balancing

• Condensation

According to the law of conservation of mass, what must be equal in a chemical reaction?

• Volume of reactants

• Temperature change

• Pressure of products

• Number of atoms

What is the method of balancing a chemical equation called?

• Guessing game method

• Random selection method

• Trial and error method

• Hit and miss method

What is the physical state of the reactants and products represented by in a chemical equation?

• Italicized text

• (g), (l), (aq), (s)

• Subscript

• Superscript

What type of reaction is the formation of water from hydrogen and oxygen?

• Double displacement

• Displacement

• Combination

• Decomposition

Which type of reaction involves the exchange of ions between the reactants?

• Double displacement

• Displacement

• Decomposition

• Combination