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JIPMER 2019
Exam
JIPMER
Year
2019
Subject
Chemistry
Chapter
Redox Reactions

JIPMER 2019 · Chemistry · Redox Reactions

BrO_3^ - changes into Br_2 in an acidic medium of a unbalanced...

BrO3−\mathrm{BrO}_3^{-}changes into Br2\mathrm{Br}_2 in an acidic medium of a unbalanced equation. How many electron should be present on the balanced equation?

Options

  1. A10 electron in left
  2. B6 electron in left
  3. C3 electron in left
  4. D3 electron in left

Correct answer

A. 10 electron in left

Step-by-step solution

The equation when BrO3−\mathrm{BrO}_3^{-}changes into Br2\mathrm{Br}_2 in an acidic medium is as follows 2BrO3−+12H+⟶Br2+6H2O2 \mathrm{BrO}_3^{-}+12 \mathrm{H}^{+} \longrightarrow \mathrm{Br}_2+6 \mathrm{H}_2 \mathrm{O} Add 10e−10 \mathrm{e}^{-}in LHS to balance the charge on both sides 2BrO3−+10e++12H+⟶Br2+6H2O. 2 \mathrm{BrO}_3^{-}+10 \mathrm{e}^{+}+12 \mathrm{H}^{+} \longrightarrow \mathrm{Br}_2+6 \mathrm{H}_2 \mathrm{O} \text{. }
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