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