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AIIMS 2014
Exam
AIIMS
Year
2014
Subject
Chemistry
Chapter
d and f Block Elements

AIIMS 2014 · Chemistry · d and f Block Elements

In presence of acidic medium, KMnO_4 converts H_2 ~S into

In presence of acidic medium, KMnO4\mathrm{KMnO}_4 converts H2 S\mathrm{H}_2 \mathrm{~S} into

Options

  1. AMn only
  2. BMnS only
  3. CMnS+S\mathrm{MnS}+\mathrm{S}
  4. DS only.

Correct answer

D. S only.

Step-by-step solution

Acidified KMnO4\mathrm{KMnO}_4 oxidises H2 S\mathrm{H}_2 \mathrm{~S} to S\mathrm{S} only. 2KMnO4+3H2SO4+5H2 S⟶K2SO4+2MnSO4+5 S+8H2O2 \mathrm{KMnO}_4+3 \mathrm{H}_2 \mathrm{SO}_4+5 \mathrm{H}_2 \mathrm{~S} \longrightarrow \mathrm{K}_2 \mathrm{SO}_4+2 \mathrm{MnSO}_4+5 \mathrm{~S}+8 \mathrm{H}_2 \mathrm{O}
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