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