WorksheetsMid Unit 1 Exam Review-Types of Chemical Reactions
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
A glass of water undergoes four changes: First it is frozen solid. Next, the ice is crushed into small pieces of ice. Third, the ice melts, and fourth, an electrical current is passed through the water to separate out hydrogen and oxygen. Which of the following represents the correct sequence of changes to the water?
Hint: Copy and paste this link and watch the video: https://www.youtube.com/watch?v=4ZGULLWEy1c&t=163s
Hint: Copy and paste this link and watch the video: https://www.youtube.com/watch?v=4ZGULLWEy1c&t=163s
a)
physical, physical, chemical, chemical
b)
physical, chemical, physical, chemical
c)
physical, physical, physical, chemical
2.
Which statement best describes a chemical reaction?
Hint: copy and paste the following link and watch the video.
https://study.com/academy/lesson/what-is-a-chemical-reaction-definition-effects.html
Hint: copy and paste the following link and watch the video.
https://study.com/academy/lesson/what-is-a-chemical-reaction-definition-effects.html
a)
In a chemical reaction, one or more substances called products are combined or broken down to form reactants.
b)
In a chemical reaction, one or more substances called products are combined or broken down to form compounds.
c)
In a chemical reaction, one or more substances called reactants are combined or broken down to form products.
3.
Consider the equation S + O2 → SO2. What is the product?
Hint: copy and paste this link and watch the video.
https://www.youtube.com/watch?v=TDQ2J1blqgg
Hint: copy and paste this link and watch the video.
https://www.youtube.com/watch?v=TDQ2J1blqgg
a)
SO 2
b)
S + SO 2
4.
In an exothermic reaction, energy may be released to the surroundings in the form of
Hint: copy and paste the following link and watch the video.
https://study.com/academy/lesson/exothermic-reaction-definition-example-quiz.html
Hint: copy and paste the following link and watch the video.
https://study.com/academy/lesson/exothermic-reaction-definition-example-quiz.html
a)
light
b)
thermal
c)
all of the above
5.
Which of the following indicates that an exothermic reaction has taken place?
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=eJXL0IrbtqE
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=eJXL0IrbtqE
a)
release of heat and/or light energy
b)
absorption of heat by the reaction
6.
Because it needs sunlight to proceed, what type of reaction is photosynthesis?
Hint: Copy and paste the following link and watch the video.
https://www.youtube.com/watch?v=eJXL0IrbtqE
Hint: Copy and paste the following link and watch the video.
https://www.youtube.com/watch?v=eJXL0IrbtqE
a)
endothermic
b)
exothermic
c)
combustion
7.
Consider the equation 4 Fe+3 O2 → 2 Fe2O3 . In this equation, 3 O2 is a
Hint: Copy and paste the link and watch the following video.
https://www.youtube.com/watch?v=TDQ2J1blqgg
Hint: Copy and paste the link and watch the following video.
https://www.youtube.com/watch?v=TDQ2J1blqgg
a)
product
b)
reactant
8.
Which of the following is an example of a physical change to matter?
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=w4UjfZqo1M0
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=w4UjfZqo1M0
a)
digestion
b)
freezing
c)
rusting
9.
In a cold pack, which type of reaction draws heat from the surroundings?
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=L-G7pLufXAo
Hint: Copy and paste the link and watch the video.
https://www.youtube.com/watch?v=L-G7pLufXAo
a)
endothermic
b)
exothermic
10.
What type of reaction is the equation C + O2 → CO2?
Hint: Copy and paste the link and watch this video.
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
Hint: Copy and paste the link and watch this video.
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
11.
Which generalized equation represents a synthesis reaction?Hint: Copy and paste the link and watch this video.
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
a)
A + B → AB
b)
AB → A + B
c)
A +BC → AC+ B
d)
AB +CD → AC+ BD
12.
Which generalized equation represents a single displacement reaction?
Hint: Copy and paste the link and watch this video.
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
Hint: Copy and paste the link and watch this video.
https://www.youtube.com/watch?v=p9a-gyXxbso&t=284s
a)
A + B → AB
b)
AB → A + B
c)
A +BC → AC+ B
d)
AB +CD → AC+ BD
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