Chemical Bonding Quiz #3 (Chemical Reactions)
  • 1. Chemical reactions take place when...
A) none of the answers are correct
B) large molecules are broken apart
C) small molecules come together
D) two of the answers are correct
  • 2. In an exothermic reaction...
A) energy is given off
B) no answer is c
C) energy is needed
D) two of the answers are correct
  • 3. In an endothermic reaction...
A) energy is needed
B) none of the answers are correct
C) two of the answers are correct
D) energy is given off
  • 4. Which of the following is not an example of a chemical reaction?
A) baking a cake
B) cutting a piece of wood with a saw
C) a car rusting
D) growing of hair
  • 5. Oxidation is...
A) a chemical reaction in which an electron is made
B) a chemical reaction in which an electron is destroyed
C) a chemical reaction in which an atom accepts electrons while combining with other elements
D) a chemical reaction in which electrons are transferred to an atom from other elements
  • 6. Reduction is...
A) a chemical reaction in which electrons are transferred to an atom from other elements
B) a chemical reaction in which an atom accepts electrons while combining with other elements
C) a chemical reaction in which an electron is made
D) a chemical reaction in which an electron is destroyed
  • 7. When water (or another liquid) dissolves a solid this is called what type of reaction?
A) precipitation
B) depolymerization
C) polymerization
D) solution
  • 8. A salt forms by the neutralization of what?
A) none of the answers are correct
B) alkanes
C) acids and bases
D) petroleum
  • 9. This produces hydrogen ions (H^+)
A) hydrocarbon
B) acid
C) base
D) plastic
  • 10. This produces hydroxide ions (OH^-)
A) base
B) acid
C) plastic
D) hydrocarbon
  • 11. Which statement(s) are true about the pH scale
A) bases have more H^+ ions than pure water
B) all of the answers are correct
C) pure water has 10-7 moles/L of H^+ ions
D) acids have less H^+ ions pure letter than pure water
  • 12. Most large common biological molecules are built by a process called...
A) depolymerization
B) hydrocarbonization
C) polymerization
D) acidic/basic reactions
  • 13. Hydrocarbons are made up of the following elements.
A) carbon and hydrogen
B) hydrogen and oxygen
C) carbon and oxygen
D) carbon, oxygen and hydrogen
  • 14. Alkanes are a family of molecules that...
A) are easily burned and used for fuels
B) two of the answers are correct
C) help in acid and base reactions
D) length and shape affects the melting points
  • 15. An isomer is...
A) none of the answers are correct
B) a cell that has an equal concentration on the inside as well as the outside of it
C) a different form of an atom
D) a molecule that is all by itself
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