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Chapter 3: Matter — Properties and Changes

Practice Test
      
  1.A solution of solids is a(n)___________.  
  a.   pure metal  
  b.   heterogeneous mixture  
  c.   filtration  
  d.   alloy  
  Hint    
      
  2.Elements on the left side of the periodic table are _______.  
  a.   metals  
  b.   nonmetals  
  c.   metalloids  
  d.   compounds  
  Hint    
      
  3.Matter that has a uniform and unchanging composition is a ___________.  
  a.   solid  
  b.   substance  
  c.   mixture  
  d.   vapor  
  Hint    
      
  4.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    
      
  5.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   crystallization  
  b.   distillation  
  c.   filtration  
  d.   chromatography  
  Hint    
      
  6.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    
      
  7.What is the percent by mass of the components of water?  
  a.   67% H, 33% O b.   33% H, 67% O  
  c.   89% H, 11% O d.   11% H, 89% O  
  Hint    
      
  8.Which of the following is not a chemical property?  
  a.   rusting of iron  
  b.   burning a piece of wood  
  c.   freezing of water  
  d.   placing iron in hydrochloric acid and producing hydrogen gas  
  Hint    
      
  9.Seawater is not a substance because __________.  
  a.   it is a liquid  
  b.   its composition may be different from sample to sample  
  c.   it has hydrogen as part of its composition  
  d.   it is salty  
  Hint    
      
  10.Periods are ___________ on the periodic table.  
  a.   vertical columns  
  b.   horizontal rows  
  c.   left to right diagonals  
  d.   right to left diagonals  
  Hint    
      
  11.Which of the following is a pure substance?  
  a.   soda  
  b.   steam  
  c.   sugar water  
  d.   gun powder  
  Hint    
      
  12.Which of the following is a heterogeneous mixture?  
  a.   sugar in water  
  b.   samples of nitrogen and oxygen in the same container  
  c.   samples of argon and iron in the same container  
  d.   sugar  
  Hint    
      
  13.Which of the following is not a state of matter?  
  a.   gas  
  b.   solid  
  c.   liquid  
  d.   density  
  Hint    
      
  14.A vapor is a _________.  
  a.   liquid  
  b.   condensed state  
  c.   gas  
  d.   solid  
  Hint    
      
  15.Which of the following is a compound?  
  a.   neon  
  b.   steel  
  c.   crude oil  
  d.   water  
  Hint    
      
  16.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   crystallization  
  b.   filtration  
  c.   distillation  
  d.   chromatography  
  Hint    
      
  17.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
 
  a.   volume of reactants = mass of products  
  b.   volume of reactants = volume of products  
  c.   mass of the reactants = mass of products  
  d.   mass of reactants = volume of products  
  Hint    
      
  18.When one substance changes identity, it exhibits a(n) __________.  
  a.   extensive property  
  b.   chemical property  
  c.   intensive property  
  d.   physical property  
  Hint    
      
  19.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
 
  a.   copper yields oxygen and copper(II) oxide  
  b.   copper(II) oxide yields oxygen and copper  
  c.   copper and oxygen yield copper(II) oxide  
  d.   oxygen yields copper and copper(II) oxide  
  Hint    
      
  20.What type of property is observed when milk sours?  
  a.   a chemical property  
  b.   an extensive property  
  c.   a physical property  
  d.   an intensive property  
  Hint    

 
   
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