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Chapter 3: Matter — Properties and Changes

Practice Test
      
  1.Fe2O3 is a(n) _____________.  
  a.   element  
  b.   compound  
  c.   heterogeneous mixture  
  d.   homogeneous mixture  
  Hint    
      
  2.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
 
  a.   copper yields oxygen and copper(II) oxide  
  b.   copper and oxygen yield copper(II) oxide  
  c.   copper(II) oxide yields oxygen and copper  
  d.   oxygen yields copper and copper(II) oxide  
  Hint    
      
  3.Which of the following is a compound?  
  a.   crude oil  
  b.   steel  
  c.   water  
  d.   neon  
  Hint    
      
  4.When one substance changes identity, it exhibits a(n) __________.  
  a.   intensive property  
  b.   chemical property  
  c.   physical property  
  d.   extensive property  
  Hint    
      
  5.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   filtration  
  b.   chromatography  
  c.   distillation  
  d.   crystallization  
  Hint    
      
  6.Which of the following is a pure substance?  
  a.   soda  
  b.   gun powder  
  c.   steam  
  d.   sugar water  
  Hint    
      
  7.Matter that has a uniform and unchanging composition is a ___________.  
  a.   solid  
  b.   substance  
  c.   mixture  
  d.   vapor  
  Hint    
      
  8.A vapor is a _________.  
  a.   gas  
  b.   solid  
  c.   liquid  
  d.   condensed state  
  Hint    
      
  9.Elements on the left side of the periodic table are _______.  
  a.   compounds  
  b.   nonmetals  
  c.   metalloids  
  d.   metals  
  Hint    
      
  10.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
 
  a.   volume of reactants = mass of products  
  b.   mass of the reactants = mass of products  
  c.   volume of reactants = volume of products  
  d.   mass of reactants = volume of products  
  Hint    
      
  11.Periods are ___________ on the periodic table.  
  a.   left to right diagonals  
  b.   vertical columns  
  c.   right to left diagonals  
  d.   horizontal rows  
  Hint    
      
  12.A solution of solids is a(n)___________.  
  a.   filtration  
  b.   pure metal  
  c.   alloy  
  d.   heterogeneous mixture  
  Hint    
      
  13.Seawater is not a substance because __________.  
  a.   its composition may be different from sample to sample  
  b.   it has hydrogen as part of its composition  
  c.   it is salty  
  d.   it is a liquid  
  Hint    
      
  14.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   sugar in water  
  c.   samples of nitrogen and oxygen in the same container  
  d.   sugar  
  Hint    
      
  15.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   plasma  
  b.   solid  
  c.   liquid  
  d.   gas  
  Hint    
      
  16.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   a gaseous property  
  b.   chemical property  
  c.   a physical property  
  d.   a crystalline property  
  Hint    
      
  17.What type of property is observed when milk sours?  
  a.   a physical property  
  b.   an intensive property  
  c.   a chemical property  
  d.   an extensive property  
  Hint    
      
  18.What is the percent by mass of the components of water?  
  a.   33% H, 67% O b.   67% H, 33% O  
  c.   11% H, 89% O d.   89% H, 11% O  
  Hint    
      
  19.Properties that are dependent on the amount of substance present are ________.  
  a.   external properties  
  b.   extensive properties  
  c.   intensive properties  
  d.   chemical properties  
  Hint    
      
  20.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   element  
  b.   substance  
  c.   compound  
  d.   mixture  
  Hint    

 
   
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