JAMB Chemistry 2017 Objective — Question 6
Question 6 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2017 Objective paper, with the correct answer and a full explanation.
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The oxidation number of iodine in potassium iodate, KIO3, is
- A. A. +7
- B. B. +3
- C. C. +5Correct
- D. D. +6
Explanation
K is +1, O is -2 (x3=-6). For neutral compound: 1 + I - 6 = 0, so I = +5.
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