Redox Reaction Oxidation Number
Authored by Lisa Thompson
Science
11th Grade
NGSS covered
Used 2+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the oxidation number of oxygen in most cases?
-2
+1
-1
+2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the oxidation state of hydrogen in compounds?
0
+1
+2
-1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the key concept to remember in redox reactions?
OILRIG - Oxidation is loss of electrons, reduction is gain of electrons
Redox reactions involve only protons
Oxygen is the most important element
Electronation and de-electronation
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the oxidation state of an element by itself?
0
+1
+2
-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the final step in balancing a redox equation?
Combining the half-reactions
Writing the half-reactions
Determining the reaction products
Assigning oxidation states
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Reduction happens at the
anode
cathode
salt bridge
voltmeter
Tags
NGSS.HS-PS2-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a redox reaction, spectator ions...
become oxidised
become reduced
remain unchanged
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