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Olympiad workbook
Exam
Olympiad workbook
Subject
NSEC
Chapter
Electrochemistry

Olympiad workbook · NSEC · Electrochemistry

Given the E_0 values for the half reactions: aligned & Sn^ 4+ +2 ^...

Given the E0E_0 values for the half reactions: Sn4++2\mathrme−→Sn2+,0.15 V2Hg2++2\mathrme−→Hg22+,0.92 VPbO2+4H++2\mathrme−→Pb2++2H2O,1.45 V\begin{aligned} & \mathrm{Sn}^{4+}+2 \mathrme^{-} \rightarrow \mathrm{Sn}^{2+}, 0.15 \mathrm{~V} \\ & 2 \mathrm{Hg}^{2+}+2 \mathrme^{-} \rightarrow \mathrm{Hg}_2^{2+}, 0.92 \mathrm{~V} \\ & \mathrm{PbO}_2+4 \mathrm{H}^{+}+2 \mathrme^{-} \rightarrow \mathrm{Pb}^{2+}+2 \mathrm{H}_2 \mathrm{O}, 1.45 \mathrm{~V} \end{aligned} Which of the following statements is true?

Options

  1. ASn2+\mathrm{Sn}^{2+} is a stronger oxidizing agent than Pb4+\mathrm{Pb}^{4+}.
  2. BSn2+\mathrm{Sn}^{2+} is a stronger reducing agent than Hg22+\mathrm{Hg}_2^{2+}.
  3. CHg2+\mathrm{Hg}^{2+} is a stronger oxidizing agent than Pb4+\mathrm{Pb}^{4+}.
  4. DPb2+\mathrm{Pb}^{2+} is a stronger reducing agent than Sn2+\mathrm{Sn}^{2+}.

Correct answer

B. Sn2+\mathrm{Sn}^{2+} is a stronger reducing agent than Hg22+\mathrm{Hg}_2^{2+}.

Step-by-step solution

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