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Chapter 3: Matter — Properties and Changes

Practice Test
  1.What type of property is observed when milk sours?  
  a.   an intensive property  
  b.   a physical property  
  c.   an extensive property  
  d.   a chemical property  
  2.Fe2O3 is a(n) _____________.  
  a.   compound  
  b.   homogeneous mixture  
  c.   element  
  d.   heterogeneous mixture  
  3.Seawater is not a substance because __________.  
  a.   it has hydrogen as part of its composition  
  b.   it is salty  
  c.   its composition may be different from sample to sample  
  d.   it is a liquid  
  4.Properties that are dependent on the amount of substance present are ________.  
  a.   chemical properties  
  b.   extensive properties  
  c.   intensive properties  
  d.   external properties  
  5.Which of the following is a pure substance?  
  a.   gun powder  
  b.   sugar water  
  c.   steam  
  d.   soda  
  6.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   substance  
  b.   mixture  
  c.   compound  
  d.   element  
  7.A solution of solids is a(n)___________.  
  a.   filtration  
  b.   alloy  
  c.   heterogeneous mixture  
  d.   pure metal  
  8.What is the percent by mass of the components of water?  
  a.   33% H, 67% O b.   67% H, 33% O  
  c.   89% H, 11% O d.   11% H, 89% O  
  9.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   chromatography  
  b.   crystallization  
  c.   filtration  
  d.   distillation  
  10.Periods are ___________ on the periodic table.  
  a.   horizontal rows  
  b.   right to left diagonals  
  c.   left to right diagonals  
  d.   vertical columns  
  11.Which of the following is a heterogeneous mixture?  
  a.   sugar in water  
  b.   samples of nitrogen and oxygen in the same container  
  c.   sugar  
  d.   samples of argon and iron in the same container  
  12.A characteristic that can be observed or measured without changing the sample’s composition is ________________.  
  a.   chemical property  
  b.   a physical property  
  c.   a gaseous property  
  d.   a crystalline property  
  13.Which of the following is not a state of matter?  
  a.   liquid  
  b.   solid  
  c.   gas  
  d.   density  
  14.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
  a.   volume of reactants = volume of products  
  b.   mass of reactants = volume of products  
  c.   mass of the reactants = mass of products  
  d.   volume of reactants = mass of products  
  15.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of conservation of energy  
  b.   law of conservation of mass  
  c.   law of gravity  
  d.   law of multiple proportions  
  16.When one substance changes identity, it exhibits a(n) __________.  
  a.   chemical property  
  b.   extensive property  
  c.   intensive property  
  d.   physical property  
  17.Elements on the left side of the periodic table are _______.  
  a.   compounds  
  b.   nonmetals  
  c.   metalloids  
  d.   metals  
  18.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   distillation  
  b.   crystallization  
  c.   filtration  
  d.   chromatography  
  19.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  
  20.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   chemical properties  
  b.   products  
  c.   reactants  
  d.   physical changes  

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