SECTION
CHEMICAL REACTIONS
2.4
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
CHAPTER 2
Chemistry of Life
a. 6H2O and 6CO2
b. 6CO2 and C6H12O6
c. 6H2O, C6H12O6, and 6O2
d. C6H12O2 and 6O6
3. The double arrows tell you that the following reaction
CO 2 + H 2O
CO 2CO 3
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
Copyright © McDougal Littell/Houghton Mifflin Company.
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
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Section Quiz
Assessment Book
McDougal Littell Biology