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?

<p>MnO4- + Fe2+ → Mn2+ + Fe (A)</p> Signup and view all the answers

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

<p>Cr2O72-(aq) + HCl(aq) (B)</p> Signup and view all the answers

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

<p>Br2(l) (D)</p> Signup and view all the answers

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

<p>Cl¯(aq) (A)</p> Signup and view all the answers

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

<p>+1.33 V (C)</p> Signup and view all the answers

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

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

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