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WorksheetsRedox Reaction Oxidation Number
Total questions: 15
Worksheet time: 15mins
Consider the following REDOX reaction: Cl2(g) → ClO−(aq) + Cl−(aq) (basic solution) Which species is the result of oxidation?
Cl−
ClO−
What is oxidation number of O in O2 ?
0
-2
+1
+2
Another name for a "oxidation-reduction" reaction is
chemical reaction
neutralization reaction
redox reaction
nuclear reaction
Gaining hydrogen is an example of...
oxidation
reduction
In a redox reaction, the species reduced
gains electrons and is the oxidizing agent
loses electrons and is the oxidizing agent
loses electrons and is the reducing agent
gains electrons and is the reducing agent
In a reaction, copper is reduced; its number of electrons has:
Increased
Decreased
Remained Constant
Varies Randomly
Substance that oxidizes another substance by accepting its electrons.
reducing agent
oxidation number
combustion
oxidizing agent
Cl2 + 2e- --> 2Cl - is an example of:
a chemical reaction
redox
oxidation
reduction
Substance that reduces another substance by losing electrons.
reducing agent
half-reaction
electronegative atom
oxidizing agent
What is the purpose of assigning oxidation numbers to atoms in a reaction?
To identify the boiling point
To determine the color of the compound
To track the movement of electrons
To calculate the mass of the atoms
What is the main focus of redox reactions?
Sharing neutrons
Creating covalent bonds
Gaining or losing electrons
Swapping protons
What is the oxidation state of an atom in a neutral compound?
+2
-1
0
+1
In the redox reaction: @@ ext{Fe}^{2+} + ext{MnO}_4^- ightarrow ext{Fe}^{3+} + ext{Mn}^{2+}@@, which element undergoes oxidation?
A) Fe
B) Mn
C) O
D) None
What is the oxidation number of sulfur in H2SO4 ?
A) +6
B) +4
C) -2
D) 0
In a redox reaction, if a substance is oxidized, what happens to its oxidation number?
A) It increases
B) It decreases
C) It remains the same
D) It becomes zero
