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Chemical Bonding Quiz #3 (Chemical Reactions)
Contribué par: Collins
  • 1. Chemical reactions take place when...
A) small molecules come together
B) two of the answers are correct
C) none of the answers are correct
D) large molecules are broken apart
  • 2. In an exothermic reaction...
A) energy is needed
B) no answer is c
C) two of the answers are correct
D) energy is given off
  • 3. In an endothermic reaction...
A) two of the answers are correct
B) energy is needed
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) cutting a piece of wood with a saw
B) growing of hair
C) a car rusting
D) baking a cake
  • 5. Oxidation 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
  • 6. Reduction 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
  • 7. When water (or another liquid) dissolves a solid this is called what type of reaction?
A) polymerization
B) precipitation
C) solution
D) depolymerization
  • 8. A salt forms by the neutralization of what?
A) acids and bases
B) petroleum
C) alkanes
D) none of the answers are correct
  • 9. This produces hydrogen ions (H^+)
A) base
B) plastic
C) acid
D) hydrocarbon
  • 10. This produces hydroxide ions (OH^-)
A) hydrocarbon
B) plastic
C) base
D) acid
  • 11. Which statement(s) are true about the pH scale
A) pure water has 10-7 moles/L of H^+ ions
B) bases have more H^+ ions than pure water
C) all of the answers are correct
D) acids have less H^+ ions pure letter than pure water
  • 12. Most large common biological molecules are built by a process called...
A) hydrocarbonization
B) polymerization
C) depolymerization
D) acidic/basic reactions
  • 13. Hydrocarbons are made up of the following elements.
A) carbon, oxygen and hydrogen
B) carbon and oxygen
C) carbon and hydrogen
D) hydrogen and oxygen
  • 14. Alkanes are a family of molecules that...
A) two of the answers are correct
B) help in acid and base reactions
C) are easily burned and used for fuels
D) length and shape affects the melting points
  • 15. An isomer is...
A) a molecule that is all by itself
B) none of the answers are correct
C) a cell that has an equal concentration on the inside as well as the outside of it
D) a different form of an atom
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