Q1 · CSIR NET Chemistry, June 2019
Paper: CSIR NET June 2019 · Subject: Inorganic Chemistry · Chapter: Acid 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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