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Unit 8 Pretest



 

 1. 

The production of an insoluble or slightly soluble solid compound in a double replacement reaction results in the formation of a
A
gas
B
precipitate
C
catalyst
D
halogen
 

 2. 

In a chemical equation, the symbol “(aq)” indicates that the substance is
A
water
B
dissolved in water
C
an acid
D
insoluble
 

 3. 

To balance a chemical equation, it may be necessary to adjust the
A
coefficients
C
subscripts
B
formulas of the products
D
number of products
 

 4. 

If chlorine gas is produced by a single replacement reaction, the halogen that replaced it must be
A
bromine
B
iodine
C
fluorine
D
astatine
 

 5. 

What is the balanced equation when aluminum is added to an aqueous solution of copper (II) sulfate?
A
2 Al  +  Cu2S  -->  Al2S  +  2 Cu
B
2 Al  +  3 CuSO4  -->  Al2(SO4)3  +  3 Cu 
C
Al  +  CuSO4  -->  AlSO4  +  Cu
D
2 Al  +  Cu2SO4  -->  Al2SO4  +  2 Cu
E
no reaction occurs
 

 6. 

Predict what happens when calcium metal is added to a solution of magnesium chloride.
A
no reaction occurs
C
magnesium calcite forms
B
calcium chloride forms
D
chlorine gas is formed
 

 7. 

Which of the following reactions could be predicted using the activity series?
A
CaO  +  H2O  -->  Ca(OH)2
B
CuCl  +  Na  -->  NaCl  +  Cu
C
Pb(NO3)2  +  Na2SO4  -->  PbSO4  +  2 NaNO3
D
CH3CH3  -->  CH2CH2  +  H2
 

 8. 

Which set of coefficients correctly balances the following equation?
__ NH4NO2  -->  __ N2  +  __ H2O
A
1, 2, 2
B
2, 1, 1
C
1, 1, 2
D
2, 2, 2
 

 9. 

When a binary compound decomposes, what is produced?
A
an oxide
C
an acid
B
a tertiary compound
D
2 elements
 

 10. 

When a metal chlorate is heated, it decomposes to yield a metal chloride and
A
a metal oxide
D
oxygen
B
carbon dioxide
E
water
C
a metal hydroxide
 

 11. 

Which of the following reactions could be predicted using a solubility chart?
A
CaO  +  H2O  -->  Ca(OH)2     
B
CuCl  +  Na  -->  NaCl  +  Cu     
C
Pb(NO3)2  +  Na2SO4  -->  PbSO4  +  2 NaNO3     
D
CH3CH3  -->  CH2CH2  +  H2
 

 12. 

In the equation   2 Al  +  3 Fe(NO3)2  -->  3 Fe  +  2 Al(NO3)3, iron has been replaced by
A
nitrate
B
aluminum
C
water
D
nitrogen
 

 13. 

When butane gas (C4H10) is burned in air, it reacts with the oxygen in the air.  What products are formed in this reaction?
A
CO and H2O
C
CO2 and H2
B
CO2 and H2O
D
CO and H2
 

 14. 

The reaction    2 Mg  +  O2  -->  2 MgO  is a
A
double replacement reaction
D
synthesis reaction
B
single replacement reaction
E
combustion reaction
C
decomposition reaction
 

 15. 

What is the name of the list of elements arranged according to the ease with which they undergo certain chemical reactions?
A
reactivity list
D
reaction sequence
B
solubility chart
E
activity series
C
periodic table
 



 
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