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In which of the following is the oxidation number of sulphur equal to -2?

Chemistry
WAEC 2000

In which of the following is the oxidation number of sulphur equal to -2?

  • A. S8
  • B. H2S
  • C. SO 2
  • D. SO 3 2-
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Correct Answer: Option B
Explanation

Calculating the Oxidation number of all the options, B is the correct answer.

Hydrogen has oxidation state of +1 in that compound H2S equated to 0.

 i.e    H2S = 0

         2H + S = 0

        2(+1) + S = 0

      +2 + S = 0

        S = 0 -2

        S = - 2.    - Option B 

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