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Chemical Bonding Quiz #3 (Chemical Reactions)
Contribué par: Collins
  • 1. Chemical reactions take place when...
A) large molecules are broken apart
B) none of the answers are correct
C) small molecules come together
D) two of the answers are correct
  • 2. In an exothermic reaction...
A) energy is given off
B) energy is needed
C) two of the answers are correct
D) no answer is c
  • 3. In an endothermic reaction...
A) energy is needed
B) two of the answers are correct
C) none of the answers are correct
D) energy is given off
  • 4. Which of the following is not an example of a chemical reaction?
A) growing of hair
B) a car rusting
C) baking a cake
D) cutting a piece of wood with a saw
  • 5. Oxidation is...
A) a chemical reaction in which an electron is destroyed
B) a chemical reaction in which an atom accepts electrons while combining with other elements
C) a chemical reaction in which electrons are transferred to an atom from other elements
D) a chemical reaction in which an electron is made
  • 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) depolymerization
B) solution
C) precipitation
D) polymerization
  • 8. A salt forms by the neutralization of what?
A) petroleum
B) acids and bases
C) alkanes
D) none of the answers are correct
  • 9. This produces hydrogen ions (H^+)
A) acid
B) plastic
C) base
D) hydrocarbon
  • 10. This produces hydroxide ions (OH^-)
A) base
B) plastic
C) hydrocarbon
D) acid
  • 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) depolymerization
C) polymerization
D) acidic/basic reactions
  • 13. Hydrocarbons are made up of the following elements.
A) carbon, oxygen and hydrogen
B) carbon and hydrogen
C) carbon and oxygen
D) hydrogen and oxygen
  • 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 different form of an atom
B) a molecule that is all by itself
C) none of the answers are correct
D) a cell that has an equal concentration on the inside as well as the outside of it
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