The reaction of IO₃⁻with I⁻in aqueous acidic medium results in · ABC26IN0817

Subject: Inorganic Chemistry · Chapter: Acids and Bases · Topic: Acids & Bases – General · Exam: NET JUNE 2019 · Marks: 2 · Difficulty: Easy

The reaction of $\mathrm{IO}_{3}^{-}$with $\mathrm{I}^{-}$in aqueous acidic medium results in

(a)$\mathrm{I}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$

(b)$\mathrm{I}_{2}$ and $\mathrm{H}_{2} \mathrm{O}_{2}$

(c)$\mathrm{IO}^{-}$and $\mathrm{H}_{2} \mathrm{O}$

(d)$\mathrm{IO}^{-}$and $\mathrm{H}_{2} \mathrm{O}_{2}$

Answer

Answer: A ✓ checked by 4AB · confidence high

The source book printed B; on checking, A is correct — see the explanation.

Printed B; no peroxide is formed.

Explanation

IO₃⁻ + 5I⁻ + 6H⁺ → 3I₂ + 3H₂O (the iodate–iodide comproportionation used in iodometry).

Study loop for Acids and Bases