Q29 / 160 · WBJEE 2011 · Chemistry

Which of the following is used to prepare \(\mathrm{Cl}_2\) gas at room temperature from concentrated \(\mathrm{HCl}\) ?

  • A
    \(\mathrm{MnO}_2\)
  • B
    \(\mathrm{H}_2 \mathrm{~S}\)
  • Correct answer
    C
    \(\mathrm{KMnO}_4\)
  • D
    \(\mathrm{Cr}_2 \mathrm{O}_3\)

Solution

Hints : \(2 \mathrm{MnO}_4^{-}+16 \mathrm{H}^{+}+10 \mathrm{Cl}^{-} \rightarrow 2 \mathrm{Mn}^{2+}+5 \mathrm{Cl}_2+8 \mathrm{H}_2 \mathrm{O}\)

Hence, the correct answer is option: 'C'.

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