Question

Iodine reacts with concentrated HNO₃ to yield Y along with other products. The oxidation state of iodine in Y, is
1. 1
2. 3
3. 7
4. 5

Answer 1

Correct Answer - Option 4 : 5

Concept:

Iodine reacts with concentrated HNO₃ to yield HIO₃ along with NO₂ and H₂O. The reaction involved in as follows:

I₂ + 10HNO₃ → 2HIO₃ + 10NO₂ + 4H₂ O

Calculation:

The oxidation state of ‘I’ in HIO₃ is +5 as calculated below:

1 + x + 3 (-2) = 0

x – 5 = 100; x = +5.