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Chapter 3: Matter — Properties and Changes

Practice Test
      
  1.Seawater is not a substance because __________.  
  a.   its composition may be different from sample to sample  
  b.   it is a liquid  
  c.   it has hydrogen as part of its composition  
  d.   it is salty  
  Hint    
      
  2.A solution of solids is a(n)___________.  
  a.   alloy  
  b.   filtration  
  c.   pure metal  
  d.   heterogeneous mixture  
  Hint    
      
  3.Fe2O3 is a(n) _____________.  
  a.   homogeneous mixture  
  b.   compound  
  c.   element  
  d.   heterogeneous mixture  
  Hint    
      
  4.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   samples of nitrogen and oxygen in the same container  
  c.   sugar in water  
  d.   sugar  
  Hint    
      
  5.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
 
  a.   physical changes  
  b.   products  
  c.   reactants  
  d.   chemical properties  
  Hint    
      
  6.Which of the following is not a state of matter?  
  a.   solid  
  b.   liquid  
  c.   gas  
  d.   density  
  Hint    
      
  7.Periods are ___________ on the periodic table.  
  a.   vertical columns  
  b.   horizontal rows  
  c.   left to right diagonals  
  d.   right to left diagonals  
  Hint    
      
  8.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    
      
  9.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   a gaseous property  
  b.   a physical property  
  c.   chemical property  
  d.   a crystalline property  
  Hint    
      
  10.What is the percent by mass of the components of water?  
  a.   11% H, 89% O b.   67% H, 33% O  
  c.   33% H, 67% O d.   89% H, 11% O  
  Hint    
      
  11.Elements on the left side of the periodic table are _______.  
  a.   metalloids  
  b.   metals  
  c.   compounds  
  d.   nonmetals  
  Hint    
      
  12.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   compound  
  b.   substance  
  c.   element  
  d.   mixture  
  Hint    
      
  13.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   crystallization  
  b.   chromatography  
  c.   distillation  
  d.   filtration  
  Hint    
      
  14.A vapor is a _________.  
  a.   gas  
  b.   solid  
  c.   liquid  
  d.   condensed state  
  Hint    
      
  15.Properties that are dependent on the amount of substance present are ________.  
  a.   external properties  
  b.   intensive properties  
  c.   chemical properties  
  d.   extensive properties  
  Hint    
      
  16.Which of the following is a pure substance?  
  a.   soda  
  b.   steam  
  c.   gun powder  
  d.   sugar water  
  Hint    
      
  17.Which of the following is not a chemical property?  
  a.   placing iron in hydrochloric acid and producing hydrogen gas  
  b.   freezing of water  
  c.   burning a piece of wood  
  d.   rusting of iron  
  Hint    
      
  18.Which of the following is a compound?  
  a.   neon  
  b.   water  
  c.   crude oil  
  d.   steel  
  Hint    
      
  19.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   solid  
  b.   liquid  
  c.   plasma  
  d.   gas  
  Hint    
      
  20.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    

 
   
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