JIPMER2013ChemistryPractical Chemistry
On addition of conc. H ₂ SO ₄ to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet
Options
- AH ₂ SO ₄ reduces HI to I₂
- BHI is of violet colour
- CHI gets oxidised to I ₂
- DHI changes to HIO ₃
Correct answer
C. HI gets oxidised to I ₂
Step-by-step solution
HI being a stronger reducing agent than H ₂ SO ₄ , reduces H ₂ SO ₄ to SO ₂ and is itself oxidised to I₂ .