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Electrochemical Cell Potential Quiz

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Questions and Answers

Which of the following reactions is not feasible based on the given E° values?

H+ oxidising Cu to Cu2+

Cr2O72-/H+ oxidising Cl– to Cl2

H+ oxidising Fe to Fe2+ (correct)

MnO4-/H+ oxidising Cl– to Cl2

Which of the following species is most likely to be reduced?

Cu(s)

Fe2+(aq) (correct)

Cl¯(aq)

H+(aq)

In the reaction MnO4-/H+ oxidising Cl– to Cl2, what is the role of MnO4-?

Oxidising agent (correct)

Catalyst

Reducing agent

Spectator ion

Which of the following reactions is a redox reaction?

MnO4- + Fe2+ → Mn2+ + Fe Signup and view all the answers

Which of the following combinations will NOT lead to a spontaneous reaction?

Cr2O72-(aq) + HCl(aq) Signup and view all the answers

What is the oxidising agent in the reaction Fe(s) + 2Br¯(l) → Br2(l) + Fe2+(aq)?

Br2(l) Signup and view all the answers

Which of the following species undergoes reduction in the presence of H+?

Cl¯(aq) Signup and view all the answers

What is the standard potential for the half-reaction: Cr2O72-(aq) + 14H+(aq) + 6e¯ ⇌ 2Cr3+(aq) + 7H2O(l)?

+1.33 V Signup and view all the answers

Which of the following reactions involves an increase in oxidation number of an element?

MnO4-(aq) + 8H+(aq) + 5e¯ → Mn2+(aq) + 4H2O(l) Signup and view all the answers