Concentrated $\mathrm{HNO}_{3}$ reacts with Iodine to give

(C) $\mathrm{HIO}_{3}, \mathrm{NO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$

(A) $\mathrm{HI}, \mathrm{NO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$

(B) $\mathrm{HIO}_{2}, \mathrm{~N}_{2} \mathrm{O}$ and $\mathrm{H}_{2} \mathrm{O}$

(D) $\mathrm{HIO}_{4}, \mathrm{~N}_{2} \mathrm{O}$ and $\mathrm{H}_{2} \mathrm{O}$

JEE Main · 2022 · 28 Jul 2022 · Shift 2 · p-Block Elements

Concentrated

HNO_{3}

reacts with Iodine to give

(A) $HI, NO_{2}$ and $H_{2} O$
(B) $HIO_{2}, N_{2} O$ and $H_{2} O$
(C) $HIO_{3}, NO_{2}$ and $H_{2} O$ ✓ Correct
(D) $HIO_{4}, N_{2} O$ and $H_{2} O$

Answer: (C)

Solution

Concentrated nitric acid is a strong oxidizing agent. It oxidizes iodine to iodic acid according to the reaction:

I X_{2} + 10 HNO X_{3} (conc) 2 HIO X_{3} + 10 NO X_{2} + 4 H X_{2} O

The products are iodic acid (

HIO X_{3}

), nitrogen dioxide (

NO X_{2}

), and water.

JEE Main · 2022 · 28 Jul 2022 · Shift 2 · Single correct option

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