Pblock Elementsii Result Question 3
3. Iodine reacts with concentrated $\mathrm{HNO} _3$ to yield $Y$ along with other products. The oxidation state of iodine in $Y$, is
(a) $1$
(b) $3$
(c) $7$
(d) $5$
(2019 Main, 12 Jan I)
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Answer:
Correct Answer: 3. ( d )
Solution:
- Iodine reacts with concentrated $\mathrm{HNO} _3$ to yield $\mathrm{HIO} _3$ along with $\mathrm{NO} _2$ and $\mathrm{H} _2 \mathrm{O}$. The reaction involved in as follows :
$\mathrm{I}_2+10 \mathrm{HNO}_3 \longrightarrow 2 \mathrm{HIO}_3+10 \mathrm{NO}_2+4 \mathrm{H}_2 \mathrm{O}$
The oxidation state of ‘I’ in $\mathrm{HIO} _3$ is 5 as calculated below :
\begin{aligned} & 1+x+3(-2)=0 \\ & x-5=0, x=+5 \\ & \end{aligned}
BETA
