The oxidation number of oxygen in BaO 2 is
CHEMISTRY
POST UTME OAU
The oxidation number of oxygen in BaO2 is
- A) -2
- B) -4
- C) -1
- D) 0
Correct Answer: C) -1
Explanation
The oxidation number of oxygen in BaO 2 (Barium peroxide) is -1. In most compounds, the oxidation number of oxygen is -2. However, in peroxides like BaO 2 , each oxygen atom is assigned an oxidation number of -1. This is because the bond between the two oxygen atoms in a peroxide is relatively weak, so it's easier for each oxygen to take one electron from the barium atom, resulting in an oxidation number of -1 for each oxygen atom.
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