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Chemical Reactions Pre-assessment

14 Questions  I  By Jkrug
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1.  In the chemical equation    H<sub>2</sub>O<sub>2</sub>  à  H<sub>2</sub>O   +  O<sub>2</sub>f       the  O<sub>2</sub>  is a ____.
A.
B.
C.
D.
2.  The equation H3PO4 + 3KOH  --> K3PO3 + 3H2O is an example of which type of reaction?
A.
B.
C.
D.
3.  When the equation    Fe  +  Cl2   à FeCl3 is balanced, what is the coefficient for Cl ?
A.
B.
C.
D.
4.                      When the equation   KClO3 (s)  à  KCl (s) +  O2 (g)  is balanced, the coefficient of KClO3 is
A.
B.
C.
D.
5.                       Which of the following combinations of symbol and explanation of symbol is correct when used in a chemical equation?
A.
B.
C.
D.
6.  When the following equation is balanced, what is the coefficient for HCl? Mg(s)  +  HCl (aq) à   MgCl2 (aq) + H2 (g)
A.
B.
C.
D.
7.  A net ionic equation
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B.
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D.
8.                  The reaction 2Fe  + 3Cl2   --> 2FeCl3 is an example of which type of reaction?
A.
B.
C.
D.
9.                       In a combustion reaction, one of the reactants is
A.
B.
C.
D.
10.  What does the  triangle symbol  above the arrow in a chemical equation mean?
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B.
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D.
11.  Which of the following statements is true about what happens in all chemical reactions?
A.
B.
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D.
12.  Chemical reactions
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13.  Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?
A.
B.
C.
D.
14.  The equation Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) is an example of which type of reaction?
A.
B.
C.
D.
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