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Chemical Bonding Quiz #3 (Chemical Reactions)
Con il contributo di: Collins
  • 1. Chemical reactions take place when...
A) small molecules come together
B) large molecules are broken apart
C) none of the answers are correct
D) two of the answers are correct
  • 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) 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) baking a cake
B) cutting a piece of wood with a saw
C) a car rusting
D) growing of hair
  • 5. Oxidation is...
A) a chemical reaction in which an electron is destroyed
B) a chemical reaction in which an electron is made
C) a chemical reaction in which electrons are transferred to an atom from other elements
D) a chemical reaction in which an atom accepts electrons while combining with other elements
  • 6. Reduction 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 electron is destroyed
D) a chemical reaction in which an atom accepts electrons while combining with other elements
  • 7. When water (or another liquid) dissolves a solid this is called what type of reaction?
A) precipitation
B) depolymerization
C) solution
D) polymerization
  • 8. A salt forms by the neutralization of what?
A) alkanes
B) none of the answers are correct
C) acids and bases
D) petroleum
  • 9. This produces hydrogen ions (H^+)
A) plastic
B) base
C) hydrocarbon
D) acid
  • 10. This produces hydroxide ions (OH^-)
A) acid
B) hydrocarbon
C) base
D) plastic
  • 11. Which statement(s) are true about the pH scale
A) acids have less H^+ ions pure letter than pure water
B) all of the answers are correct
C) bases have more H^+ ions than pure water
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) depolymerization
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) are easily burned and used for fuels
B) length and shape affects the melting points
C) two of the answers are correct
D) help in acid and base reactions
  • 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) none of the answers are correct
D) a molecule that is all by itself
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