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Chapter 3: Matter — Properties and Changes

Practice Test
  1.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   products  
  b.   chemical properties  
  c.   reactants  
  d.   physical changes  
  2.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   element  
  b.   mixture  
  c.   compound  
  d.   substance  
  3.Fe2O3 is a(n) _____________.  
  a.   compound  
  b.   homogeneous mixture  
  c.   heterogeneous mixture  
  d.   element  
  4.Which of the following is a compound?  
  a.   neon  
  b.   steel  
  c.   water  
  d.   crude oil  
  5.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   filtration  
  b.   crystallization  
  c.   distillation  
  d.   chromatography  
  6.How can you tell when the following reaction is balanced?
2Cu + O2 → 2CuO
  a.   volume of reactants = mass of products  
  b.   mass of the reactants = mass of products  
  c.   mass of reactants = volume of products  
  d.   volume of reactants = volume of products  
  7.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  
  8.What is the percent by mass of the components of water?  
  a.   67% H, 33% O b.   33% H, 67% O  
  c.   11% H, 89% O d.   89% H, 11% O  
  9.A solution of solids is a(n)___________.  
  a.   pure metal  
  b.   filtration  
  c.   heterogeneous mixture  
  d.   alloy  
  10.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   crystallization  
  b.   filtration  
  c.   distillation  
  d.   chromatography  
  11.Which of the following is a pure substance?  
  a.   sugar water  
  b.   gun powder  
  c.   soda  
  d.   steam  
  12.Matter that has a uniform and unchanging composition is a ___________.  
  a.   mixture  
  b.   solid  
  c.   substance  
  d.   vapor  
  13.When one substance changes identity, it exhibits a(n) __________.  
  a.   physical property  
  b.   chemical property  
  c.   extensive property  
  d.   intensive property  
  14.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
  a.   oxygen yields copper and copper(II) oxide  
  b.   copper and oxygen yield copper(II) oxide  
  c.   copper yields oxygen and copper(II) oxide  
  d.   copper(II) oxide yields oxygen and copper  
  15.A vapor is a _________.  
  a.   solid  
  b.   condensed state  
  c.   liquid  
  d.   gas  
  16.Periods are ___________ on the periodic table.  
  a.   right to left diagonals  
  b.   vertical columns  
  c.   horizontal rows  
  d.   left to right diagonals  
  17.Which of the following is not a state of matter?  
  a.   solid  
  b.   density  
  c.   liquid  
  d.   gas  
  18.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  
  19.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of gravity  
  b.   law of multiple proportions  
  c.   law of conservation of energy  
  d.   law of conservation of mass  
  20.What type of property is observed when milk sours?  
  a.   a chemical property  
  b.   an extensive property  
  c.   an intensive property  
  d.   a physical property  

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