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Chemistry
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10th Grade
•
Hard
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17 Slides • 18 Questions
1
2
3
Multiple Choice
According to the rules of oxidation numbers, what is the oxidation number of an element in its pure elemental form?
0
+1
-1
+2
4
5
Multiple Choice
According to the rules shown, what is the oxidation state of sulfur in H2SO4?
+4
+6
-2
0
6
7
8
Multiple Select
Which of the following statements are correct about reducing and oxidizing agents?
A reducing agent donates electrons and its oxidation state increases.
An oxidizing agent accepts electrons and its oxidation state decreases.
A reducing agent accepts electrons and its oxidation state decreases.
An oxidizing agent donates electrons and its oxidation state increases.
9
Open Ended
Explain the difference between oxidation and reduction in terms of electron transfer and oxidation state changes.
10
11
Fill in the Blanks
Fill in the blank: The process in which a substance gains electrons is called
Type answer...
12
13
Open Ended
List the steps involved in balancing a redox reaction using the electron method.
14
15
Multiple Choice
In the reaction NH3 + Cl2 → N2 + HCl, which element is oxidized and which is reduced?
N is oxidized, Cl is reduced
Cl is oxidized, N is reduced
Both N and Cl are oxidized
Both N and Cl are reduced
16
17
Multiple Choice
Which process converts CO2 and water into glucose and sustains life on Earth?
Photosynthesis
Respiration
Combustion
Fermentation
18
19
Open Ended
Compare the roles of mitochondria in cellular respiration and the process of photosynthesis in plants.
20
21
Multiple Choice
Which of the following reactions releases a large amount of heat and is used for cooking and industrial production?
Combustion of butane gas
Photosynthesis
Cellular respiration
Electrolysis
22
23
Fill in the Blanks
The process of extracting iron from its ore using CO at high temperature is called
Type answer...
24
25
Multiple Select
Select all processes that involve redox reactions.
Photosynthesis
Cellular respiration
Combustion of fuel
Electrolysis
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27
Open Ended
Explain the economic impact of metal corrosion as described in the lesson.
28
29
Fill in the Blanks
The process of rusting involves the exchange of
Type answer...
30
Multiple Choice
Which of the following is an example of an application of electron transfer in daily life?
Rusting of iron
Photosynthesis in plants
Combustion in a gas stove
All of the above
31
Open Ended
Summarize the main concepts covered in the lesson about oxidation and reduction.
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33
34
Open Ended
How do the rules for assigning oxidation numbers help you understand chemical reactions?
35
Multiple Choice
What is the oxidation number of an element in its pure form?
0
+1
-1
+2
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