Which of the following halogen oxides is ionic?
A. `ClO_2`
B. `BrO_2`
C. `I_2O_5`
D. `I_4O_9`

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1 Answers

Correct Answer - D
`I_4O_9` is ionic in nature. It is in fact iodate of tripositive iodine cation `(I^(3+))`. Thus, its ionic formula is `I^(3+)(IO_3)_3`, ie., iodine triiodate.

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