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Study Quiz 1
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1
Which of the following statements is true about redox reactions?
A)They may involve the loss of electrons only.
B)They may involve the gain of electrons only.
C)They involve both the loss and gain of electrons.
D)They involve only spectator ions.
2
What is the balanced net ionic equation for the reaction of iron with copper(II) sulfate?
A)Fe(s) + CuSO4(aq)à FeSO4(aq) + Cu(s)

B)Fe(s) + Cu2+(aq)à Fe2+(aq) + Cu(s)

C)Fe(s)à Fe2+(aq)

D)Cu2+(aq)à Cu(s)

3
What is the oxidizing agent in the following reaction?

CuO(s) + Mg(s)à Cu(s) + MgO(s)

A)Cu2+
B)Mg
C)Mg2+
D)Cu
4
What is the reducing agent in the following reaction?

CuO(s) + Mg(s)à Cu(s) + MgO(s)

A)Cu2+
B)Mg
C)Mg2+
D)Cu
5
Which substance in the following reaction is reduced?
2Cr3+(aq) + 6Cl-(aq)à 2Cr(s) + 3Cl2(g)

A)Cr
B)Cr3+
C)Cl-
D)Cl2
6
Which substance in the following reaction is oxidized?

2Cr3+(aq) + 6Cl-(aq)à 2Cr(s) + 3Cl2(g)

A)Cr
B)Cr3+
C)Cl-
D)Cl2
7
What is the oxidation half-reaction for the redox reaction of magnesium and copper(II) oxide?
A)Mg(s)à Cu(s)
B)Mg(s)à Mg2+(aq)
C)Mg(s)à Mg2+ + 2e-
D)Cu2+(aq) + 2e-à Cu(s)
8
What is the reduction half-reaction for the redox reaction of magnesium and copper (II) oxide?
A)Cu2+(aq) + 2e-à Cu(s)
B)Mg(s)à Mg2+(aq) + 2e-
C)Mg(s) à Mg2+(aq)
D)Mg(s)à Cu(s)





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