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Chapter 3: Matter — Properties and Changes

Practice Test
  1.Properties that are dependent on the amount of substance present are ________.  
  a.   external properties  
  b.   intensive properties  
  c.   chemical properties  
  d.   extensive properties  
  2.A vapor is a _________.  
  a.   liquid  
  b.   solid  
  c.   condensed state  
  d.   gas  
  3.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
  a.   mass of the reactants = mass of products  
  b.   volume of reactants = volume of products  
  c.   mass of reactants = volume of products  
  d.   volume of reactants = mass of products  
  4.Which of the following is a compound?  
  a.   steel  
  b.   water  
  c.   neon  
  d.   crude oil  
  5.Which of the following is a pure substance?  
  a.   gun powder  
  b.   soda  
  c.   sugar water  
  d.   steam  
  6.Elements on the left side of the periodic table are _______.  
  a.   metalloids  
  b.   metals  
  c.   nonmetals  
  d.   compounds  
  7.A solution of solids is a(n)___________.  
  a.   alloy  
  b.   pure metal  
  c.   filtration  
  d.   heterogeneous mixture  
  8.Matter that has a uniform and unchanging composition is a ___________.  
  a.   solid  
  b.   vapor  
  c.   substance  
  d.   mixture  
  9.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   substance  
  b.   compound  
  c.   element  
  d.   mixture  
  10.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   filtration  
  b.   distillation  
  c.   chromatography  
  d.   crystallization  
  11.Periods are ___________ on the periodic table.  
  a.   vertical columns  
  b.   horizontal rows  
  c.   right to left diagonals  
  d.   left to right diagonals  
  12.Which of the following is a heterogeneous mixture?  
  a.   samples of nitrogen and oxygen in the same container  
  b.   sugar in water  
  c.   samples of argon and iron in the same container  
  d.   sugar  
  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  
  14.Fe2O3 is a(n) _____________.  
  a.   compound  
  b.   homogeneous mixture  
  c.   heterogeneous mixture  
  d.   element  
  15.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   chemical property  
  b.   a gaseous property  
  c.   a crystalline property  
  d.   a physical property  
  16.Which of the following is not a chemical property?  
  a.   freezing of water  
  b.   placing iron in hydrochloric acid and producing hydrogen gas  
  c.   rusting of iron  
  d.   burning a piece of wood  
  17.What type of property is observed when milk sours?  
  a.   a physical property  
  b.   a chemical property  
  c.   an extensive property  
  d.   an intensive property  
  18.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   distillation  
  b.   chromatography  
  c.   crystallization  
  d.   filtration  
  19.When one substance changes identity, it exhibits a(n) __________.  
  a.   intensive property  
  b.   extensive property  
  c.   physical property  
  d.   chemical property  
  20.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   products  
  b.   physical changes  
  c.   chemical properties  
  d.   reactants  

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