Respuesta :
The oxidation number of -2 is in Na₂S
What is Oxidation Number ?
oxidation number is the number assigned to an element which denotes the number of electron gained or lost by the atom of that element in the compound
The question is
In Which Compound Does Sulfur Have An Oxidation Number Of -2?
A) SO₂ B) SO₃ C) Na₂S D) Na₂SO₄
Oxidation number of Oxygen = -2
Oxidation number of Sodium = +1
and net charge on the compound is zero
Let the oxidation number of sulfur in each option is = X
Given SO₂ = X - 4= 0 , X = +4
SO₃ = X-6 = 0, X= +6
Na₂S = 2 + X = 0 , X = -2
Na₂SO₄ = 2 + X - 8 = 0 , X = 6
Therefore the oxidation number of -2 is in Na₂S.
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