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Oxidation number of sulphur in a given oxide, oxyanion or oxyacid

This type of question, asked 7 times: 4 May 2023 S2, 11 May 2023 S1, 11 May 2024 S2, 25 Apr 2025 S2, 17 Apr 2026 S2, 13 May 2026 S1, 14 May 2026 S2. All 7 questions below, oldest first.

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  1. Question 1

    4 May 2023 S2

    87
    What is the oxidation state of S in SO₄²⁻?

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  2. Question 2

    11 May 2023 S1

    74
    What is oxidation number of S in SO32−SO_3^{2-}?

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  3. Question 3

    11 May 2024 S2

    51
    What is the oxidation number of sulfur in H2SO5\text{H}_2\text{SO}_5?

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  4. Question 4

    25 Apr 2025 S2

    93
    What is oxidation number of sulphur in SO3SO_{3} ?

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  5. Question 5

    17 Apr 2026 S2

    12
    Identify oxidation number of Sulphur respectively in SO2\mathrm{SO_2} and SO42−\mathrm{SO_4^{2-}} .

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  6. Question 6

    13 May 2026 S1

    11
    Find the oxidation number of S in Marshall's acid.

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  7. Question 7

    14 May 2026 S2

    12
    What is the oxidation number of S in H2SO3\mathrm{H_2SO_3} and H2S2O7\mathrm{H_2S_2O_7} respectively?

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