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JIPMER 2011
Exam
JIPMER
Year
2011
Subject
Chemistry
Chapter
Hydrogen

JIPMER 2011 · Chemistry · Hydrogen

Which of the following undergoes reduction with hydrogen peroxide...

Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

Options

  1. AMn2+\mathrm{Mn}^{2+}
  2. BI2\mathrm{I}_2
  3. CPbS
  4. DFe2+\mathrm{Fe}^{2+}

Correct answer

B. I2\mathrm{I}_2

Step-by-step solution

It reduces iodine to iodide ion in alkaline medium. I2( s)+H2O2(aq)+2OH−⟶2I−(aq)+2H2O(l)+O2( g)\begin{array}{r}\mathrm{I}_2(\mathrm{~s})+\mathrm{H}_2 \mathrm{O}_2(a q)+2 \mathrm{OH}^{-} \longrightarrow \\ 2 \mathrm{I}^{-}(a q)+2 \mathrm{H}_2 \mathrm{O}(\mathrm{l})+\mathrm{O}_2(\mathrm{~g})\end{array}
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