9 Questions
Which of the following reactions is not feasible based on the given E° values?
H+ oxidising Fe to Fe2+
Which of the following species is most likely to be reduced?
Fe2+(aq)
In the reaction MnO4-/H+ oxidising Cl– to Cl2, what is the role of MnO4-?
Oxidising agent
Which of the following reactions is a redox reaction?
MnO4- + Fe2+ → Mn2+ + Fe
Which of the following combinations will NOT lead to a spontaneous reaction?
Cr2O72-(aq) + HCl(aq)
What is the oxidising agent in the reaction Fe(s) + 2Br¯(l) → Br2(l) + Fe2+(aq)?
Br2(l)
Which of the following species undergoes reduction in the presence of H+?
Cl¯(aq)
What is the standard potential for the half-reaction: Cr2O72-(aq) + 14H+(aq) + 6e¯ ⇌ 2Cr3+(aq) + 7H2O(l)?
+1.33 V
Which of the following reactions involves an increase in oxidation number of an element?
MnO4-(aq) + 8H+(aq) + 5e¯ → Mn2+(aq) + 4H2O(l)
Test your knowledge on electrochemical cells, cell potential, and factors affecting it such as current, temperature, pressure of gases, and concentration of solutions. The quiz includes a typical combination with the Daniel cell involving zinc and copper electrodes.
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