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Trimester 1: Types Of Chemical Equations
Test Description: Classifying Chemical Equations
Instructions: Answer all questions to get your test result.
1) During which chemical reaction is oxygen (O2) added to a hydrocarbon to form carbon dioxide (CO2) and water (H2O)?
A
single displacement / replacement
B
combustion
C
decomposition
D
synthesis / combination
2) Which statment best describes what occurs during the following reacction: F2 + energy = F + F?
A
Energy is released as a bond is broken.
B
Energy is absorbed as a bond is broken.
C
Energy is released as a bond is formed.
D
Energy is absorbed as a bond is formed.
3) Which statment best describes what occurs during the following reacction: F2 = F + F + energy?
A
Energy is released as a bond is formed.
B
Energy is absorbed as a bond is broken.
C
Energy is absorbed as a bond is formed.
D
Energy is released as a bond is broken.
4) What type of reaction is represented by the equation: 3F2 + 2FeI3 = 3I2 + 2FeF3?
A
decomposition
B
synthesis / combination
C
single replacement / displacement
D
combustion
5) Which chemical equation represents a double replacement / displacement reaction?
A
Zn + 2HCl = ZnCl2 + H2
B
2KCLO3 = 2KCl + 3O2
C
2Na + Cl2 = 2NaCl
D
NaOH + HCl = NaCl + H2O
6) What is an environmental indicator of an exothermic reaction?
A
thermometer temperature rises
B
condensation forms
C
thermometer temperature falls
D
all of the above
7) In an endothermic reaction
A
reactants absorb more energy than products release
B
products absorb more energy than reactants release
C
reactants and products absorb and release equal amounts of energy
D
energy is neither absorbed or released
8) During what type of chemical reaction is one product formed from multiple reactants?
A
single replacement / displacement
B
decomposition
C
synthesis / combination
D
combustion
9) Which of the following accurately represents a decomposition reaction?
A
NaOH + HCl = NaCl + H2O
B
2Na + Cl2 = 2NaCl
C
Zn + 2HCl = ZnCl2 + H2
D
2KCLO3 = 2KCl + 3O2
10) What type of graph represents endothermic and exothermic reactions?
A
position - time
B
enthalpy
C
mass - volume
D
BOTG
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