The oxidation number of iodine in the iodate ion (IO -3) is

The oxidation number of iodine in the iodate ion (IO –3) is
  • A.
    -5
  • B.
    -1
  • C.
    +1
  • D.
    +5
Correct Answer: Option D
Explanation

1O3
[oxidation number of 1] + [oxidation number of 0] x 3 = -1
x + -2 x 3 = 1
x – 6 = – 1
x = – 1 + 6 = +5

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