Download Chemical Reactions

Name: ______________________________Class: _________________ Date: _________________
Answer Key
Section Quiz
2.4 CHEMICAL REACTIONS
1.
2.
3.
4.
5.
b
a
c
b
d
Copyright © McDougal Littell/Houghton Mifflin Company.
Biology
1
Chemistry of Life
Name: ______________________________Class: _________________ Date: _________________
Chemical Reactions
Section Quiz
Choose the letter of the best answer.
_____ 1. Chemical reactions change substances into different substances by
a. conserving matter between the substances.
b. breaking and forming chemical bonds
c. strengthening electrical charges of substances.
d. changing a solvent into a solute.
_____ 2. Identify the reactants in the following chemical reaction: 6H2O  6CO2 
C6H12O6  6O2
a.
b.
c.
d.
6H2O and 6CO2
6CO2 and C6H12O6
6H2O, C6H12O6, and 6O2
C6H12O2 and 6O6
_____ 3. The double arrows tell you that the following reaction
CO2  H2O
CO2CO3
a. takes place very rapidly.
b. is very unstable.
c. occurs in both directions.
d. has high bond energies.
_____ 4. What is the term for the amount of energy that needs to be added for a
chemical reaction to start?
a. chemical energy.
b. activation energy.
c. bond energy.
d. reactant energy.
_____ 5. Which phrase best describes an exothermic chemical reaction?
a. does not absorb any energy
b. forms products with higher bond energy than reactants
c. is in a state of equilibrium
d. releases more energy than it absorbs
Copyright © McDougal Littell/Houghton Mifflin Company.
Biology
2
Chemistry of Life