Hydrocarbons

Practice Test
      
  1.What is the molecular compound name for hydrazine, N2H4?

Number of atoms Prefix
1 mono-
2 di-
3 tri-


 
  a.   trinitrogen quatrohydride  
  b.   trinitrogen pentahydride  
  c.   dinitrogen tetrahydride  
  d.   dinitrogen hydride  
      
  2.The structural formula -C=C- indicates a ___________ bond between the carbon atoms.  
  a.   double ionic  
  b.   single ionic  
  c.   single covalent  
  d.   double covalent  
      
  3.A 0.001M solution of HCl is ____________.  
  a.   neutral  
  b.   a dilute acid solution  
  c.   a concentrated acid solution  
  d.   a weak acid solution  
      
  4.Many simple molecules contain two lone pairs around the central atom. Which type of electron—to—electron repulsions are smallest in these molecules?  
  a.   All repulsions are equal.  
  b.   bonding pair to bonding pair  
  c.   lone pair to lone pair  
  d.   bonding pair to lone pair  
      
  5.Substances that cause cancer are ______________.  
  a.   aliphatic  
  b.   substituted  
  c.   carcinogenic  
  d.   unsaturated  
      
  6.Which of the following is not a conjugate acid-base pair?  
  a.   HCl and Cl-  
  b.   H3O+ and OH-  
  c.   HNO3 and NO3-  
  d.   H2O and OH-  
      
  7.What organic compound is characterized by the presence of a triple bond?  
  a.   alkyl halide  
  b.   alkane  
  c.   alkyne  
  d.   alkene  
      
  8.How many lone pairs of electrons are present in a molecule of water?  
  a.   2  
  b.   3  
  c.   1  
  d.   4  
      
  9.

Compared to strong acids, weak acids produce __________ ions and conduct electricity __________ efficiently.
 
  a.   fewer, less  
  b.   more, more  
  c.   more, less  
  d.   fewer, more  
      
  10.What hybridization is present in an octahedral molecular geometry?  
  a.   sp3d  
  b.   sp3  
  c.   sp3d2  
  d.   sp2  
      
  11.What is the principle use of alkanes?  
  a.   as antiseptics  
  b.   as polar solvents  
  c.   as fuels  
  d.   as flavorings  
      
  12.What property can be assigned to a carbon atom that has four different atoms or structural groups attached to it?  
  a.   isomerity  
  b.   geometry  
  c.   chivalry  
  d.   chirality  
      
  13.What type of organic compound has at least one double or triple bond?  
  a.   cyclic hydrocarbon  
  b.   saturated hydrocarbon  
  c.   alkane  
  d.   unsaturated hydrocarbon  
      
  14.What is the formula for the binary compound of potassium and chlorine?

Binary Molecular Compound Binary Acid
Contains only two different elements Contains hydrogen and one other element
Second element uses name + -ide Uses hydro + root of second element + -ic and acid


 
  a.   KCl2  
  b.   KCl  
  c.   K2ClO3  
  d.   KHCl  
      
  15.What is the name given to a series of compounds that differ from one another by a repeating unit?  
  a.   homologous series  
  b.   heterogeneous series  
  c.   homogeneous series  
  d.   hydrocarbon series  
      
  16.

How do structural isomers differ from stereoisomers?
 
  a.   Stereoisomers have different chemical and physical properties; structural isomers have the same chemical and physical propeties.  
  b.   Structural isomers' atoms are bonded in different orders; stereoisomers' atoms are bonded in the same order.  
  c.   Structural isomers have different formulas; stereoisomers have the same formula.  
  d.   Structural isomers' atoms are bonded in the same order; stereoisomers' atoms are bonded in different orders.  
      
  17.

Which of these is a product of the first step in the ionization of phosphoric acid, H3PO4?
 
  a.   PO4  
  b.   H3PO4  
  c.   HPO4  
  d.   H2PO4  
      
  18.To determine the number of bonding electron pairs, you must divide the number of electrons available for bonding by _______.  
  a.   2  
  b.   4  
  c.   1  
  d.   3  
      
  19.The process used to separate fractions from petroleum is ___________.  
  a.   chirality  
  b.   fractional distillation  
  c.   drilling  
  d.   isomerization  
      
  20.What is the prefix name that indicates when six carbon atoms are present in the alkane chain structure?  
  a.   hept  
  b.   oct  
  c.   hex  
  d.   pent  

 
   
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