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Chemical Reactions
Test Description: Chemical reactions
Instructions: Answer all questions to get your test result.
1) Which list includes three types of chemical reactions?
A
decomposition, double replacement, synthesis
B
decomposition, solidification, sublimation
C
condensation, solidification, synthesis
D
condensation, double replacement, sublimation
2) Given the balanced equation: 2 KClO3 --> 2 KCl + 3 O2. Which type of reaction is represented by this equation?
A
synthesis
B
decomposition
C
single replacement
D
double replacement
3) Given the incomplete equation: 4 Fe + 3 O2 --> 2X. Which compound is represented by X?
A
FeO
B
Fe3O4
C
Fe2O3
D
Fe3O2
4) Which metal reacts spontaneously with a solution containing zinc ions?
A
nickel
B
silver
C
copper
D
magnesium
5) Given the reaction: Mg + 2 AgNO3 --> 2 Ag + Mg(NO3)2. What type of reaction is represented?
A
synthesis
B
decomposition
C
single replacement
D
double replacement
6) Given the unbalanced equation _Fe2O3 + _CO --> _Fe + _CO2. When the equation is correctly balanced using the smallest whole-number coefficients, what is the coefficient of CO?
A
3
B
1
C
2
D
4
7) If an equation is balanced properly, both sides of the equation must have the same number of
A
coefficients
B
molecules
C
atoms
D
moles of molecules
8) What is the total number of oxygen atoms in the formula MgSO4•7H2O? [The • represents
A
5
B
4
C
11
D
7
9) The burning of magnesium involves the conversion of
A
chemical energy to mechanical energy
B
chemical energy to heat energy
C
heat energy to mechanical energy
D
heat energy to chemical energy
10) Given the unbalanced equation: _Al + _O2 --> _Al2O3. When this equation is correctly balanced using smallest whole numbers, what is the coefficient of O2(g)?
A
3
B
6
C
4
D
2
*select an answer for all questions
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