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Chapter 3: Matter — Properties and Changes

Practice Test
  1.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  
  2.Fe2O3 is a(n) _____________.  
  a.   compound  
  b.   heterogeneous mixture  
  c.   element  
  d.   homogeneous mixture  
  3.The statement, “Mass can neither be created nor destroyed” is the ____________.  
  a.   law of conservation of energy  
  b.   law of multiple proportions  
  c.   law of conservation of mass  
  d.   law of gravity  
  4.A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.  
  a.   filtration  
  b.   distillation  
  c.   chromatography  
  d.   crystallization  
  5.Properties that are dependent on the amount of substance present are ________.  
  a.   chemical properties  
  b.   external properties  
  c.   intensive properties  
  d.   extensive properties  
  6.A form of matter that has a fixed shape and occupies a fixed volume is a _________.  
  a.   solid  
  b.   gas  
  c.   plasma  
  d.   liquid  
  7.Periods are ___________ on the periodic table.  
  a.   left to right diagonals  
  b.   horizontal rows  
  c.   vertical columns  
  d.   right to left diagonals  
  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  
  9.A material that cannot be broken down further by chemical means is a(n) ________.  
  a.   compound  
  b.   element  
  c.   substance  
  d.   mixture  
  10.Elements on the left side of the periodic table are _______.  
  a.   metalloids  
  b.   compounds  
  c.   metals  
  d.   nonmetals  
  11.Which of the following is a pure substance?  
  a.   soda  
  b.   steam  
  c.   gun powder  
  d.   sugar water  
  12.In the following chemical reaction, how do you classify hydrogen and oxygen?
2H2 + O22H2O
  a.   reactants  
  b.   physical changes  
  c.   products  
  d.   chemical properties  
  13.Seawater is not a substance because __________.  
  a.   it is salty  
  b.   it is a liquid  
  c.   it has hydrogen as part of its composition  
  d.   its composition may be different from sample to sample  
  14.Which of the following is not a chemical property?  
  a.   rusting of iron  
  b.   burning a piece of wood  
  c.   placing iron in hydrochloric acid and producing hydrogen gas  
  d.   freezing of water  
  15.Which of the following is a compound?  
  a.   crude oil  
  b.   neon  
  c.   steel  
  d.   water  
  16.Matter that has a uniform and unchanging composition is a ___________.  
  a.   substance  
  b.   mixture  
  c.   vapor  
  d.   solid  
  17.A technique that uses a porous barrier to separate heterogeneous mixtures is _______.  
  a.   chromatography  
  b.   filtration  
  c.   distillation  
  d.   crystallization  
  18.How would you read the following chemical reaction?
2Cu + O2 → 2CuO
  a.   copper(II) oxide yields oxygen and copper  
  b.   copper yields oxygen and copper(II) oxide  
  c.   oxygen yields copper and copper(II) oxide  
  d.   copper and oxygen yield copper(II) oxide  
  19.A solution of solids is a(n)___________.  
  a.   heterogeneous mixture  
  b.   filtration  
  c.   alloy  
  d.   pure metal  
  20.Which of the following is a heterogeneous mixture?  
  a.   samples of argon and iron in the same container  
  b.   sugar in water  
  c.   sugar  
  d.   samples of nitrogen and oxygen in the same container  

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