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- 1. Multiple Choice
What type of change occurs during a chemical reaction?
chemical change
physical change
no change occurs
- 2. Multiple Choice
In this reaction, which substances are the reactants? Check all that apply.
CH4 + 2O2 → CO2 + 2H2O
CH4
O2
CO2
H2O
- 3. Multiple Choice
Which of these would be evidence that a chemical reaction has occurred?
Bubbles formed from heating the substance.
A color change due to red food coloring being added to the reaction.
An odor is detected that wasn't present before the reaction.
A temperature change because the reaction was heated.
- 4. Multiple Choice
Which statement about this reaction is true?
2Fe (s) + 3O2 (g) → Fe2O3 (s)
All substances in this reaction are solids.
The Iron on the reactant side is the only solid in the chemical reaction.
The Iron (III) oxide is a covalent compound.
Oxygen in this reaction is a gas.
- 5. Multiple Choice
Which skeleton equation is correct for this reaction?
Dicarbon hexahydride reacts with oxygen gas to produce Carbon dioxide and Dihydrogen monoxide.
CH4 + O2 → C2O4 + H2O
C2H6 + O2 → CO2 + H2O
CH4 + O → C2O4 + H2O
C2H6 + O → CO2 + H2O
- 6. Multiple Choice
What type of chemical reaction is this?
2H2O2 (l) → 2H20 (l) + O2 (g)
synthesis
decomposition
single replacement
double replacement
combustion
- 7. Multiple Choice
What type of chemical reaction is this?
2H2 (g) + O2 (g) → 2H2O (l)
synthesis
decomposition
single replacement
double replacement
combustion
- 8. Multiple Choice
What type of chemical reaction is this?
2Fe (s) + Cu(SO4)2 (aq) → 2FeSO4 (aq) + Cu (s)
synthesis
decomposition
single replacement
double replacement
combustion
- 9. Multiple Choice
What type of chemical reaction is this?
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)
synthesis
decomposition
single replacement
double replacement
combustion
- 10. Multiple Choice
Which answer choice correctly balances this skeleton equation?
Al (s) + O2 (g) → Al2O3 (s)
Al (s) + O2 (g) → Al2O3 (s)
2Al (s) + O2 (g) → Al2O3 (s)
2Al (s) + 3O2 (g) → 2Al2O3 (s)
4Al (s) + 3O2 (g) → 2Al2O3 (s)
- 11. Multiple Choice
Which of these compounds will be a solid in water? (Use the solubility rules in your reference packet!)
CaCl2
LiNO3
BaCO3
CuSO4
- 12. Multiple Choice
Will calcium be able to replace zinc in a single replacement reaction? (Use the Activity Series in your reference packet!)
yes
no
- 13. Multiple Choice
How many atoms of phosphorus are in this compound?
3Al2(PO4)3
3 atoms
9 atoms
12 atoms
36 atoms
- 14. Multiple Choice
Which statement is true?
Bond formation is endothermic because energy is absorbed.
Bond formation is endothermic because energy is released.
Bond formation is exothermic because energy is absorbed.
Bond formation is exothermic because energy is released.
- 15. Multiple Choice
Which statement is true?
Breaking bonds is endothermic because energy is absorbed.
Breaking bonds is endothermic because energy is released.
Breaking bonds is exothermic because energy is absorbed.
Breaking bonds is exothermic because energy is released.
- 16. Multiple Choice
What is the net ionic equation for this reaction?
Na2CO3 (aq) + BaCl2 (aq) → BaCO3 (s) + 2NaCl (aq)
2Na+ (aq) + 2Cl- (aq) → 2NaCl (aq)
Ba2+ (aq) + CO32- (aq) → BaCO3 (s)
- 17. Multiple Choice
This type of chemical reaction has 1 product that is formed by the reaction of two or more reactants.
Decomposition
Synthesis
Single Replacement
Double Replacement
Combustion
- 18. Multiple Choice
This type of chemical reaction has one reactant that breaks down into two or more products.
Decomposition
Synthesis
Single Replacement
Double Replacement
Combustion
- 19. Multiple Choice
This type of chemical reaction involves one element replacing another element in a compound.
Decomposition
Synthesis
Single Replacement
Double Replacement
Combustion
- 20. Multiple Choice
This type of chemical reaction occurs when a hydrocarbon reacts with oxygen gas to form Carbon dioxide and water.
Decomposition
Synthesis
Single Replacement
Double Replacement
Combustion
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