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Chapter 10: Organic Chemistry

Practice Test
      
  1.Why does carbon combine with so many other elements?  
  a.   its atomic radius  
  b.   its atomic structure  
  c.   the color carbon turns when combined with sulfuric acid  
  d.   its ability to bond with hydrogen and nitrogen  
  Hint    
      
  2.Which of the following best describes polymers?  
  a.   large molecules made up of smaller organic molecules, called isomers, that are linked together to form new bonds  
  b.   proteins, carbohydrates, and lipids  
  c.   large molecules made up of smaller organic molecules, called monomers, that are linked together to form new bonds  
  d.   hydrocarbons in which some of the carbon atoms form double or triple covalent bonds with other carbon atoms  
  Hint    
      
  3.What term best describes substances containing carbon?  
  a.   organic compounds  
  b.   living organisms  
  c.   food  
  d.   natural materials  
  Hint    
      
  4.If your diet contains too much cholesterol, cholesterol may build up in the arteries of your heart. What would happen if you completely avoided eating any cholesterol?  
  a.   Your body would make its own supply of cholesterol.  
  b.   Your cell membranes would be healthier.  
  c.   Your body would run out of cholesterol.  
  d.   None of the above.  
  Hint    
      
  5.What is the difference between formic acid and methylamine?  
  a.   Formic acid is a carboxylic acid and methylamine is an alcohol.  
  b.   Formic acid is an alcohol and methylamine is an amine.  
  c.   Formic acid contains a carboxyl (-COOH) group and methylamine contains an amine (-NH2) group.  
  d.   There is no difference; methylamine is another name for formic acid.  
  Hint    
      
  6.Which of the following cannot be a hydrocarbon?  
  a.   a substance containing only carbon, hydrogen, and nitrogen  
  b.   methane  
  c.   substances that form solids or liquids at room temperatures  
  d.   substances with low boiling points due to short carbon-hydrogen chains  
  Hint    
      
  7.Which of the following is true of the 18 possible isomers of octane (C8H18])?  
  a.   They occur in straight chains.  
  b.   methane  
  c.   substances that form solids or liquids at room temperatures  
  d.   All of the above.  
  Hint    
      
  8.What do alcohols, carboxylic acids, amines, and amino acids all have in common?  
  a.   All contain a hydroxyl (-OH) group substitution for one or more hydrogen atoms in a hydrocarbon.  
  b.   All are formed when a methyl(-CH3) group is displaced by a carboxyl (-COOH) group.  
  c.   substances that form solids or liquids at room temperatures  
  d.   All of the above.  
  Hint    
      
  9.What does the octane rating for gasoline tell you?  
  a.   It measures the amount of octane in fuel  
  b.   It measures the amount of heptane in fuel.  
  c.   The tendency of fuel to knock.  
  d.   All of the above.  
  Hint    
      
  10.What do glucose, sucrose, and starch have in common?  
  a.   They are carbohydrates.  
  b.   They are polymers.  
  c.   They each contain twice as many hydrogen atoms as oxygen atoms.  
  d.   All of the above.  
  Hint    
      
  11.Both lipids and carbohydrates are hydrocarbon polymers that contain carbon, hydrogen, and oxygen. What quality distinguishes lipids from carbohydrates?  
  a.   Your body can break down lipids but cannot break down carbohydrates.  
  b.   Lipids are a type of protein while carbohydrates are a type of sugar.  
  c.   Lipids are a more concentrated source of energy for the body than carbohydrates.  
  d.   For a balanced diet, you should eat more lipids than carbohydrates.  
  Hint    
      
  12.What would you call two hydrocarbons with different molecular structures but identical chemical formulas?  
  a.   isomers  
  b.   unsaturated hydrocarbons  
  c.   ethene  
  d.   covalent  
  Hint    
      
  13.What do methane, ethane, and octane have in common?  
  a.   They are unsaturated hydrocarbons.  
  b.   They are supersaturated hydrocarbons.  
  c.   They occur only in ring structures.  
  d.   They contain both covalent and ionic bonds.  
  Hint    
      
  14.Proteins, a type of hydrocarbon polymers, are a necessary part of all living cells. Which substituted hydrocarbons is linked to form proteins?  
  a.   alcohols  
  b.   amino acids  
  c.   They occur only in ring structures.  
  d.   None of the above.  
  Hint    
      
  15.Which of the following describes alcohols?  
  a.   a type of hydrocarbon  
  b.   compounds that contain only double bonds between the carbon the oxygen atoms  
  c.   compounds used only as disinfectants and cleaners  
  d.   compounds formed when a hydroxyl (-OH) group replaces one or more hydrogen atoms in a hydrocarbon  
  Hint    

 
   
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