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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
the material dissolves
B
a gas is given off
C
a color change occurs
D
Heat is released
2) The substance that is formed in a chemical reaction is called the
A
reactant
B
polymer
C
radical
D
product
3) A type of reaction that produces an increase in temperature is
A
endothermic
B
nonpolar
C
covalent
D
exothermic
4) Which of the following occurs when gasoline is burned?
A
new atoms are formed
B
New elements are formed
C
new molecules are formed
D
all of the choices
5) A synthesis reaction between magnesium (Mg) and oxygen (O2) might produce
A
Mg2
B
MgCO2
C
MgO
D
O4
6) What type of reaction is the following: CH4 + 2O2 = CO2 + 2H2O
A
decomposition
B
combustion
C
single replacement
D
synthesis
7) What type of reaction is the following: 2NH3 = N2 + 3H2
A
double replacement
B
synthesis
C
decompostion
D
single replacement
8) What type of reaction is the following: 2NaCl + H2SO4 = Na2SO4 + 2HCl
A
combustion
B
single replacement
C
synthesis
D
double replacement
9) What type of reaction is the following: Fe + S = FeS
A
double replacement
B
decomposition
C
synthesis
D
single replacement
10) What type of reaction is the following: 2Li + 2H2O = 2LiOH + H2
A
double replacement
B
synthesis
C
decomposition
D
single replacement
*select an answer for all questions
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