Physical Science, New York Edition

Chapter 21: Chemical Reactions

Standardized Test Practice

1.
Which of the following is the correct classification for the chemical reaction that occurs when an electric current passes through water: 2H2O [CDATA[→]] 2H2 + O2
A)double displacement
B)single displacement
C)synthesis
D)decomposition
2.
Which of the following types of reaction is the opposite of a decomposition reaction?
A)combustion
B)displacement
C)synthesis
D)reversible
3.
Which substance is the precipitate in the following reaction? Pb(NO3)2(aq) + Na2SO4(aq) [CDATA[→]] PbSO4(s) + 2NaNO3(aq)
A)PbSO4
B)Pb(NO3)2
C)Na2SO4
D)Pb(NO3)2
4.
If you know that dissolving ammonium nitrate in water is an endothermic reaction, then you know that _______
A)the reaction is a displacement reaction
B)the product is explosive
C)the temperature of the product is lower than the temperature of the reactants
D)the temperature of the reactants is lower than the temperature of the products
5.
Which of the metals in the activity series shown would you expect to be the least likely to be found as a relatively pure element?

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A)aluminum
B)lithium
C)gold
D)lead
6.
Which of the following metals would most likely replace iron in a solution?

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A)tin
B)copper
C)calcium
D)gold
7.
What type of reaction occurs when the positive ion of one compound replaces the positive ion of another to form two new compounds?
A)double displacement
B)combustion
C)single displacement
D)synthesis
8.
Which of these is a balanced chemical equation?
A)CH4 + 2O2 [CDATA[→]] CO2 + 2H2O
B)CH4 + 3O2 [CDATA[→]] CO2 + H2O
C)CH4 + O2 [CDATA[→]] CO2 + H2O
D)CH4 + 3O2 [CDATA[→]] CO2 + 2H2O
9.
In the formula for aluminum chloride, AlCl3, the number "3" is a _______.
A)coefficient
B)formula
C)reactant
D)subscript
10.
What is the name of the compound whose formula is CaSO4?
A)calcium sulfate
B)calcium sulfoxide
C)calcium(II) sulfate
D)calcium sulfur tetroxide
Physical Science - New York Edition
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