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Physical Science Ch 6
Test Description: Chemical reactions
Instructions: Answer all questions to get your test result.
1) Which of these is not a sign of a chemcial reaction?
A
a color change occurs
B
Heat is released
C
a gas is given off
D
the material dissolves
2) The substance that is formed in a chemical reaction is called the
A
polymer
B
product
C
radical
D
reactant
3) A type of reaction that produces an increase in temperature is
A
exothermic
B
covalent
C
endothermic
D
nonpolar
4) Which of the following occurs when gasoline is burned?
A
all of the choices
B
New elements are formed
C
new molecules are formed
D
new atoms are formed
5) A synthesis reaction between magnesium (Mg) and oxygen (O2) might produce
A
O4
B
MgO
C
Mg2
D
MgCO2
6) What type of reaction is the following: CH4 + 2O2 = CO2 + 2H2O
A
single replacement
B
combustion
C
synthesis
D
decomposition
7) What type of reaction is the following: 2NH3 = N2 + 3H2
A
decompostion
B
double replacement
C
synthesis
D
single replacement
8) What type of reaction is the following: 2NaCl + H2SO4 = Na2SO4 + 2HCl
A
single replacement
B
combustion
C
double replacement
D
synthesis
9) What type of reaction is the following: Fe + S = FeS
A
single replacement
B
decomposition
C
synthesis
D
double replacement
10) What type of reaction is the following: 2Li + 2H2O = 2LiOH + H2
A
synthesis
B
double replacement
C
single replacement
D
decomposition
*select an answer for all questions
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