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The oxidation state of oxygen on tetraoxosulpha... - JAMB Chemistry 2015 Question

The oxidation state of oxygen on tetraoxosulphate iv acid is
A
-4
B
-2
C
4
D
-8
correct option: b
In SO4. The state of oxygen oxidation number is -2. Options A,C,D do not belong to the oxidation state in SO4
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