The incorrect order of decreasing oxidation state of '`S`' `:-`

Options

A. `H_(2)S_(2)O_(7)gtNa_(2)S_(4)O_(6)gtNa_(2)S_(2)O_(3)gtS_(8)`
B. `H_(2)SO_(4)gtH_(2)SO_(3)gtSCl_(2)gtH_(2)S`
C. `SO_(3)gtSO_(2)gtS_(8)gtH_(2)S`
D. `H_(2)SO_(4)gtSO_(2)gtH_(2)SgtH_(2)S_(2)O_(8)`

Answer

To determine the incorrect order of decreasing oxidation states of sulfur (S) in the given compounds, we need to calculate the oxidation state of sulfur in each compound and then compare them.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds we need to analyze are:
- H₂S₂O₇
- Na₂S₄O₆
- Na₂S₂O₃
- S₈
- H₂SO₄
- H₂SO₃
- SCl₂
- H₂S
- SO₃
- SO₂
- H₂S₂O₈

2. **Calculate Oxidation States**:
- **H₂S₂O₇**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + 2x + 7(-2) = 0
- 2 + 2x - 14 = 0 → 2x = 12 → x = +6

- **Na₂S₄O₆**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + 4x + 6(-2) = 0
- 2 + 4x - 12 = 0 → 4x = 10 → x = +2.5

- **Na₂S₂O₃**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + 2x + 3(-2) = 0
- 2 + 2x - 6 = 0 → 2x = 4 → x = +2

- **S₈**:
- In elemental form, the oxidation state is 0.

- **H₂SO₄**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + x + 4(-2) = 0
- 2 + x - 8 = 0 → x = +6

- **H₂SO₃**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + x + 3(-2) = 0
- 2 + x - 6 = 0 → x = +4

- **SCl₂**:
- Let the oxidation state of S be x.
- Equation: x + 2(-1) = 0
- x - 2 = 0 → x = +2

- **H₂S**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + x = 0
- 2 + x = 0 → x = -2

- **SO₃**:
- Let the oxidation state of S be x.
- Equation: x + 3(-2) = 0
- x - 6 = 0 → x = +6

- **SO₂**:
- Let the oxidation state of S be x.
- Equation: x + 2(-2) = 0
- x - 4 = 0 → x = +4

- **H₂S₂O₈**:
- Let the oxidation state of S be x.
- Equation: 2(+1) + 2x + 8(-2) = 0
- 2 + 2x - 16 = 0 → 2x = 14 → x = +7

3. **Summary of Oxidation States**:
- H₂S₂O₇: +6
- Na₂S₄O₆: +2.5
- Na₂S₂O₃: +2
- S₈: 0
- H₂SO₄: +6
- H₂SO₃: +4
- SCl₂: +2
- H₂S: -2
- SO₃: +6
- SO₂: +4
- H₂S₂O₈: +7

4. **Determine the Incorrect Order**:
- The correct decreasing order of oxidation states is:
- H₂S₂O₈ (+7) > H₂S₂O₇ (+6) = H₂SO₄ (+6) = SO₃ (+6) > H₂SO₃ (+4) = SO₂ (+4) > Na₂S₄O₆ (+2.5) > Na₂S₂O₃ (+2) > SCl₂ (+2) > S₈ (0) > H₂S (-2)

5. **Identify the Incorrect Order**:
- The incorrect order from the options provided is likely the one that does not follow the correct decreasing sequence of oxidation states.

### Final Answer:
The incorrect order of decreasing oxidation state of sulfur is option number 4.