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

Q1 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Inorganic Chemistry · Chapter: Acids and Bases · Topic: Acid and Bases – General · Marks: 2 · Difficulty: Easy

The reaction of $\mathrm{IO_3^-}$ with $\mathrm{I^-}$ in aqueous acidic medium results in

(a)$\mathrm{I_2}$ and $\mathrm{H_2O}$

(b)$\mathrm{I_2}$ and $\mathrm{H_2O_2}$

(c)$\mathrm{IO^-}$ and $\mathrm{H_2O}$

(d)$\mathrm{IO^-}$ and $\mathrm{H_2O_2}$

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

IO₃⁻ + 5 I⁻ + 6 H⁺ → 3 I₂ + 3 H₂O. Iodate oxidises iodide to iodine in acid; the products are I₂ and water.

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