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Chapter 3: Matter — Properties and Changes

Practice Test
      
  1.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
 
  a.   chemical properties  
  b.   physical changes  
  c.   products  
  d.   reactants  
  Hint    
      
  2.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of multiple proportions  
  b.   law of gravity  
  c.   law of conservation of energy  
  d.   law of conservation of mass  
  Hint    
      
  3.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   a crystalline property  
  b.   chemical property  
  c.   a physical property  
  d.   a gaseous property  
  Hint    
      
  4.What is the percent by mass of the components of water?  
  a.   67% H, 33% O b.   89% H, 11% O  
  c.   11% H, 89% O d.   33% H, 67% O  
  Hint    
      
  5.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   sugar  
  c.   samples of nitrogen and oxygen in the same container  
  d.   sugar in water  
  Hint    
      
  6.Seawater is not a substance because __________.  
  a.   it has hydrogen as part of its composition  
  b.   it is a liquid  
  c.   its composition may be different from sample to sample  
  d.   it is salty  
  Hint    
      
  7.Which of the following is not a state of matter?  
  a.   liquid  
  b.   solid  
  c.   density  
  d.   gas  
  Hint    
      
  8.What type of property is observed when milk sours?  
  a.   an extensive property  
  b.   an intensive property  
  c.   a physical property  
  d.   a chemical property  
  Hint    
      
  9.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   distillation  
  b.   crystallization  
  c.   chromatography  
  d.   filtration  
  Hint    
      
  10.Which of the following is a pure substance?  
  a.   steam  
  b.   gun powder  
  c.   sugar water  
  d.   soda  
  Hint    
      
  11.Matter that has a uniform and unchanging composition is a ___________.  
  a.   substance  
  b.   vapor  
  c.   mixture  
  d.   solid  
  Hint    
      
  12.Fe2O3 is a(n) _____________.  
  a.   element  
  b.   compound  
  c.   homogeneous mixture  
  d.   heterogeneous mixture  
  Hint    
      
  13.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   liquid  
  b.   gas  
  c.   solid  
  d.   plasma  
  Hint    
      
  14.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   chromatography  
  b.   filtration  
  c.   distillation  
  d.   crystallization  
  Hint    
      
  15.A solution of solids is a(n)___________.  
  a.   heterogeneous mixture  
  b.   filtration  
  c.   alloy  
  d.   pure metal  
  Hint    
      
  16.Which of the following is not a chemical property?  
  a.   burning a piece of wood  
  b.   placing iron in hydrochloric acid and producing hydrogen gas  
  c.   rusting of iron  
  d.   freezing of water  
  Hint    
      
  17.Properties that are dependent on the amount of substance present are ________.  
  a.   external properties  
  b.   chemical properties  
  c.   intensive properties  
  d.   extensive properties  
  Hint    
      
  18.When one substance changes identity, it exhibits a(n) __________.  
  a.   physical property  
  b.   extensive property  
  c.   chemical property  
  d.   intensive property  
  Hint    
      
  19.Elements on the left side of the periodic table are _______.  
  a.   compounds  
  b.   metals  
  c.   metalloids  
  d.   nonmetals  
  Hint    
      
  20.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
 
  a.   mass of the reactants = mass of products  
  b.   mass of reactants = volume of products  
  c.   volume of reactants = mass of products  
  d.   volume of reactants = volume of products  
  Hint    

 
   
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