Chlorine oxidizes sodium thiosulphate to form

Options

A. `Na_(2)SO_(3)`
B. `Na_(2)O`
C. `Na_(2)SO_(4)`
D. `Na_(2)CO_(3)`

Answer

To solve the question "Chlorine oxidizes sodium thiosulphate to form", we need to analyze the reaction between chlorine and sodium thiosulphate (Na2S2O3).

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are sodium thiosulphate (Na2S2O3) and chlorine (Cl2) in the presence of water (H2O).

2. **Understand the Role of Chlorine**: Chlorine acts as an oxidizing agent. This means it will accept electrons from sodium thiosulphate, leading to its oxidation.

3. **Write the Reaction**: The reaction can be represented as follows:
\[ \text{Na}_2\text{S}_2\text{O}_3 + \text{Cl}_2 + \text{H}_2\text{O} \rightarrow \text{Na}_2\text{SO}_4 + \text{S} + \text{HCl} \]
In this reaction, sodium thiosulphate is oxidized to sodium sulfate (Na2SO4), and sulfur (S) is formed as a precipitate.

4. **Analyze the Products**: From the reaction, we see that the products formed are sodium sulfate (Na2SO4) and sulfur (S).

5. **Choose the Correct Option**: Among the given options:
- Na2SO3 (sodium sulfite) - Incorrect
- Na2O (sodium oxide) - Incorrect
- Na2SO4 (sodium sulfate) - Correct
- Na2CO3 (sodium carbonate) - Incorrect

Therefore, the correct answer is **Na2SO4**.

### Final Answer:
Chlorine oxidizes sodium thiosulphate to form **Na2SO4**.