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Chemical Bonding Quiz #3 (Chemical Reactions)
Opracowany przez: Collins
  • 1. Chemical reactions take place when...
A) none of the answers are correct
B) two of the answers are correct
C) small molecules come together
D) large molecules are broken apart
  • 2. In an exothermic reaction...
A) no answer is c
B) energy is needed
C) energy is given off
D) two of the answers are correct
  • 3. In an endothermic reaction...
A) two of the answers are correct
B) none of the answers are correct
C) energy is needed
D) energy is given off
  • 4. Which of the following is not an example of a chemical reaction?
A) a car rusting
B) baking a cake
C) growing of hair
D) cutting a piece of wood with a saw
  • 5. Oxidation 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
  • 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 electrons are transferred to an atom from other elements
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) solution
B) polymerization
C) depolymerization
D) precipitation
  • 8. A salt forms by the neutralization of what?
A) none of the answers are correct
B) alkanes
C) petroleum
D) acids and bases
  • 9. This produces hydrogen ions (H^+)
A) acid
B) plastic
C) hydrocarbon
D) base
  • 10. This produces hydroxide ions (OH^-)
A) acid
B) base
C) plastic
D) hydrocarbon
  • 11. Which statement(s) are true about the pH scale
A) pure water has 10-7 moles/L of H^+ ions
B) acids have less H^+ ions pure letter than pure water
C) all of the answers are correct
D) bases have more H^+ ions than pure water
  • 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 and oxygen
B) carbon and hydrogen
C) hydrogen and oxygen
D) carbon, oxygen and hydrogen
  • 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 different form of an atom
B) a molecule that is all by itself
C) a cell that has an equal concentration on the inside as well as the outside of it
D) none of the answers are correct
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