_____ is formed when potassium iodide is heated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)

_____ is formed when potassium iodide is heated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
  1. HI
  2. \(\mathrm{I}_{2}\)
  3. \(\mathrm{HIO}_{3}\)
  4. \(\mathrm{KIO}_{3}\)

Solution

Potassium iodide reacts with sulphuric acid to produce potassium sulphate, iodine, hydrogen sulfide and water. Potassium iodide - solid. Sulfuric acid concentrated solution. The reaction takes place in a boiling solution.
$$
8 \mathrm{KI}+5 \mathrm{H}_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 4 \mathrm{~K}_{2} \mathrm{SO}_{4}+4 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{~S}+4 \mathrm{H}_{2} \mathrm{O}
$$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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