Question

Which of the following is not true about $I_4{O}_9$?

• A. Iodine exists in both +3 and +5 oxidation states
• B. It has a peroxide bond
• C. It reacts with water to give iodine and iodic acid
• D. It exists as a dark yellow solid

Answer 1

The correct option is B It has a peroxide bond

$I(OI{O}_2{)}_3$, tetraiodine nonoxide $\left(I_4{O}_9\right)$ does not have a peroxide bond. It is a dark yellow solid which decomposes to iodic acid $\left(HI{O}_3\right)$ and iodine $\left(I_2\right)$ when dissolved in water.