Which of the following statement (s) is/are correct?

Options

A. In `S_(2)O_(3)^(2-)`, both sulphur are different in nature
B. Sodium acedact Mn,SN,Fe oxalate giving different type of product
C. Aqueous solution of `OCI^(Theta),S^(2-) and CO_(3)^(2-)` are basic in nature
D. `NO_(2)^(Theta)` oxidises `I^(Theta)` whereas `Br_(2)` and `CI_(2)` oxidies `NO_(2)^(Theta)`

Answer

To determine which of the statements is/are correct, we will analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** Discusses the structure and charge of the thiosulfate ion (\( \text{S}_2\text{O}_3^{2-} \)).
- The thiosulfate ion consists of two sulfur atoms and three oxygen atoms.
- One sulfur atom is in the +6 oxidation state (attached to three oxygens), while the other sulfur is in the -2 oxidation state (attached to the other sulfur).
- The total charge on the thiosulfate ion is indeed -2, confirming that this statement is correct.

### Step 2: Analyze Statement B
**Statement B:** Claims that the aqueous solutions of \( \text{OCl}^- \), \( \text{S}^{2-} \), and carbonate ions (\( \text{CO}_3^{2-} \)) are basic in nature.
- The conjugate acids of these bases are \( \text{HOCl} \) (weak acid), \( \text{H}_2\text{S} \) (weak acid), and \( \text{H}_2\text{CO}_3 \) (weak acid).
- Since all these conjugate acids are weak acids, their corresponding anions are basic.
- Therefore, this statement is also correct.

### Step 3: Analyze Statement C
**Statement C:** Discusses the reduction reactions involving \( \text{HNO}_2 \) and iodide ions.
- \( \text{HNO}_2 \) can reduce iodide ions (\( \text{I}^- \)) to iodine (\( \text{I}_2 \)) while itself getting oxidized to \( \text{NO} \).
- This behavior is consistent with known redox reactions, confirming that this statement is correct.

### Step 4: Analyze Statement D
**Statement D:** Discusses the behavior of \( \text{HNO}_2 \) with chlorine and bromine.
- \( \text{HNO}_2 \) can reduce \( \text{Cl}^- \) to \( \text{HCl} \) and gets oxidized to \( \text{HNO}_3 \).
- Similarly, it can reduce bromide ions to \( \text{HBr} \) while getting oxidized to \( \text{HNO}_3 \).
- This behavior is also consistent with known redox reactions, confirming that this statement is correct.

### Conclusion
After analyzing all the statements:
- **Correct Statements:** A, B, C, and D are all correct.
- **Final Answer:** Statements A, B, C, and D are correct.

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