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JIPMER 2013
Exam
JIPMER
Year
2013
Subject
Chemistry
Chapter
Practical Chemistry

JIPMER 2013 · Chemistry · Practical Chemistry

On addition of conc. H_2 SO_4 to a chloride salt, colourless fumes...

On addition of conc. H2SO4\mathrm{H}_2 \mathrm{SO}_4 to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet

Options

  1. AH2SO4\mathrm{H}_2 \mathrm{SO}_4 reduces HI to I2I_2
  2. BHI is of violet colour
  3. CHI gets oxidised to I2\mathrm{I}_2
  4. DHI changes to HIO3\mathrm{HIO}_3

Correct answer

C. HI gets oxidised to I2\mathrm{I}_2

Step-by-step solution

HI being a stronger reducing agent than H2SO4\mathrm{H}_2 \mathrm{SO}_4, reduces H2SO4\mathrm{H}_2 \mathrm{SO}_4 to SO2\mathrm{SO}_2 and is itself oxidised to I2I_2.
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