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Chapter 3: Matter — Properties and Changes

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

 
   
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