Carbon Chemistry – Answers
Mr. Blom/ Mr. Cannon
Multiple Choice: In the space provided, identify the letter of the choice that best completes the statement or answers the
question. The number in the blank provided indicates the Chapter and Section where the answer is located.
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1. Figure 9-1 contains a model of graphite. Which of the following statements is true about graphite?
The bonds between graphite layers are weaker than the bonds within graphite layers.
2. In buckminsterfullerene, carbon atoms are
bonded in alternating hexagons and pentagons on the surface of a hollow sphere.
3. Which of the following statements helps explain why there are millions of carbon compounds?
Carbon has four valence electrons.
Carbon atoms form bonds with other carbon atoms.
Carbon atoms can form single, double, and triple bonds.
all of the above
4. Which of the following statements is true?
a. Organic compounds always contain carbon and hydrogen.
5. The carbon atoms in a hydrocarbon CANNOT be arranged in
a network solid.
6. Butane has the formula C4H10. Which of the following is the formula of cyclobutane?
C4H8
7. Which of the following is another name for a saturated hydrocarbon?
alkane
8. Which of the following is a saturated hydrocarbon?
isopropane
9. The prefix dec- means “ten.” Which of the following best describes the structure of decene?
It contains ten carbon atoms and at least one double bond.
10. Which of the following compounds is most reactive?
ethyne
11. Which of the following is NOT an example of a fossil fuel?
methanol
12. Burning coal usually produces more soot than burning natural gas or petroleum products because coal
contains aromatic hydrocarbons with high molar masses.
13. What are the main products of the incomplete combustion of fossil fuels?
water and carbon monoxide
14. The combustion of fossil fuels causes the acidity of rain to increase because
sulfur dioxide and nitrogen oxides dissolve in water forming sulfuric and nitric acids.
15. Which of the following is NOT a result of the complete combustion of fossil fuels?
The amount of carbon monoxide in the atmosphere increases.
16. Which of the following statements explains why inhaling carbon monoxide is dangerous?
Carbon monoxide keeps hemoglobin in the blood from carrying oxygen to cells.
17. In the compound CH3F, the fluorine atom is a(an)
functional group.
18. The functional group in ethanol, which is an alcohol, is the
hydroxyl group.
19. Propanoic acid and ethyl alcohol can react. The products of this reaction are water and an
ester
20. The smell of rotten fish is caused by the presence of an
amine.
21. When monomers link together, they usually form
a polymer.
22. In a polymer, monomers are linked by
covalent bonds.
Carbon Chemistry – Answers
Mr. Blom/ Mr. Cannon
_9.3_ 23. Which of the following exists as both a natural and a synthetic polymer?
rubber
_9.3_ 24. Which of the following statements about natural rubber and synthetic rubber is true?
Natural and synthetic rubber contain different monomers.
_9.3_ 25. Natural polymers are produced
in both plant and animal cells.
_9.3_ 26. The monomers from which proteins are made are
amino acids.
_9.4_ 27. Plants convert energy from sunlight into chemical energy during
photosynthesis.
_9.4_ 28. Which of the following statements is true?
Both photosynthesis and cellular respiration occur in plants.
_9.4_ 29. Proteins that act as catalysts for chemical reactions that occur in cells are
enzymes.
_9.4_ 30. Which of the following statements is true about enzymes?
Enzymes allow reactions to proceed at temperatures near 37ºC.
_8.1_ 31. A salt is dissolved in water, which has a boiling point of 100°C. The boiling point of the solution will be
greater than 100°C.
_8.1_ 32. During the formation of a solution, energy is
either released or absorbed.
_8.1_ 33. A student dissolved equal amounts of salt in equal amounts of warm water, room-temperature water, and ice
water. Which of the following is true?
The salt dissolved most quickly in the warm water.
_8.2_ 34. One way to determine the degree of saturation of a solid-liquid solution is to drop a crystal of the solute into
the solution. If the crystal sits at the bottom of the container, the solution is
saturated.
_8.2_ 35. A solution that contains more solute than it would normally hold at that temperature is said to be
supersaturated.
_8.3_ 36. Which of the following is NOT a property of an acid?
feels slippery
_8.3_ 37. Which of the following is NOT a common property of bases?
reacts with metals
_8.3_ 38. An acid can be defined as
a proton donor.
_8.4_ 39. Distilled water has a hydronium ion concentration of 1  107 M. What is the pH of a distilled water?
7
_8.4_ 40. A compound has a pH of 6 in solution, where very little of it has ionized. The compound is a
weak acid.
_8.4_ 41. A small amount of acid is added to a buffer solution. The pH of the solution will
stay about the same.
_8.4_ 42. A substance that ionizes or dissociates into ions when placed in water is always a(an)
electrolyte.