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Olympiad workbook
Exam
Olympiad workbook
Subject
NSEC
Chapter
Electrochemistry

Olympiad workbook · NSEC · Electrochemistry

When the pH of the system is increased by 2.0 units, maximum...

When the pH of the system is increased by 2.0 units, maximum decrease in half cell potential for the reaction will be observed in

Options

  1. AV2+(aq)→V3+(aq)+\mathrme−\mathrm{V}^{2+}(\mathrm{aq}) \rightarrow \mathrm{V}^{3+}(\mathrm{aq})+\mathrme^{-}
  2. BVO3−+2H+→VO2++H2O\mathrm{VO}_3^{-}+2 \mathrm{H}^{+} \rightarrow \mathrm{VO}_2^{+}+\mathrm{H}_2 \mathrm{O}
  3. CVO2++2H++\mathrme−→V3++H2O\mathrm{VO}^{2+}+2 \mathrm{H}^{+}+\mathrme^{-} \rightarrow \mathrm{V}^{3+}+\mathrm{H}_2 \mathrm{O}
  4. DVO2++H2O→VO2++2H++\mathrme−\mathrm{VO}^{2+}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{VO}_2^{+}+2 \mathrm{H}^{+}+\mathrme^{-}

Correct answer

C. VO2++2H++\mathrme−→V3++H2O\mathrm{VO}^{2+}+2 \mathrm{H}^{+}+\mathrme^{-} \rightarrow \mathrm{V}^{3+}+\mathrm{H}_2 \mathrm{O}

Step-by-step solution

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