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Oxidation-Reduction — Quiz Answers

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Which best describes the oxidizing agent in this reaction? Cl sub 2 times A q plus 2 Br raised to the negative A q power rightarrow 2 Cl raised to the negative A q power plus Br sub 2 times A q

A
Bromine Br is the oxidizing agent because it loses an electron.
B
Chlorine Cl is the oxidizing agent because it gains an electron.
C
Chlorine Cl is the oxidizing agent because it loses an electron.
D
Bromine Br is the oxidizing agent because it gains an electron.
2
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In this redox reaction, which is the reducing agent? MnO sub 2 times s plus 4 cap h raised to the plus A q power plus 2 Cl raised to the negative A q power rightarrow Mn raised to the 2 plus power times A q plus 2 cap h sub 2 cap o l plus Cl sub 2 times g

A
MnO sub 2
B
Cl raised to the negative power
C
Mn raised to the 2 plus power
D
Cl sub 2
3

What is being reduced in this reaction? Mg plus Cl sub 2 rightarrow Mg raised to the 2 plus power plus 2 Cl raised to the negative power

A
Mg
B
Cl sub 2
C
2 Cl raised to the negative power
D
Mg raised to the 2 plus power
4

Which of these is an oxidation-reduction reaction?

A
Pb open paren NO sub 3 close paren sub 2 plus Na sub 2 SO sub 4 rightarrow 2 NaNO sub 3 plus PbSO sub 4
B
2 NaOH plus cap h sub 2 CO sub 3 rightarrow Na sub 2 CO sub 3 plus 2 NaOH
C
Fe sub 2 cap o sub 3 plus 3 CO rightarrow 2 Fe plus 3 CO sub 2
D
CuSO sub 4 plus 2 NaOH rightarrow Cu OH sub 2 plus Na sub 2 SO sub 4
5

What is the oxidation number for cap s in the compound SO sub 3 ? (Recall that cap o has an oxidation number of negative 2 )

A
0
B
plus 2
C
plus 4
D
plus 6
6

Identify the type of reaction. 2 HgO s rightarrow 2 Hg l plus cap o sub 2 times g

A
a combustion reaction involving burning a metal in oxygen
B
an acid-base neutralization reaction to produce oxygen gas
C
a displacement reaction involving two metals
D
a decomposition reaction in which a metal is reduced
7

What is being oxidized in this reaction? Mg plus Cl sub 2 rightarrow Mg raised to the 2 plus power plus 2 Cl raised to the negative power

A
2 Cl raised to the negative power
B
Cl sub 2
C
Mg raised to the 2 plus power
D
Mg
8

Which of these is true about a redox reaction?

A
In a redox reaction, the oxidizing agent loses electrons.
B
In a redox reaction, the reducing agent loses electrons.
C
In a redox reaction, the reduced species loses electrons.
D
In a redox reaction, the oxidized species gains electrons.
9

Which identifies an oxidation-reduction reaction?

A
a neutralization reaction
B
a reaction in which oxidation numbers change
C
a double replacement reaction
D
a reaction in which no electrons are transferred
10

Which of these is an oxidation-reduction reaction?

A
CaO times s plus cap h sub 2 cap o l rightarrow Ca OH sub 2 s
B
ZnS times s plus 2 cap o sub 2 g rightarrow ZnSO sub 4 times s
C
6 Li sub 2 cap o s plus cap p sub 4 cap o sub 10 g rightarrow 4 Li sub 3 PO sub 4 s
D
SO sub 2 times g plus cap h sub 2 cap o l rightarrow cap h sub 2 SO sub 3 A q

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