Which reagent does not give oxygen as one of the products during oxidation with ozone ?

Options

A. `SO_2`
B. `SnCl_1//HCl`
C. `H_2 S`
D. `PbS`

Answer

To determine which reagent does not produce oxygen as one of the products during oxidation with ozone, we can analyze each of the given options:

### Step 1: Identify the Reagents
The reagents provided are:
1. SO2 (Sulfur Dioxide)
2. SnCl2 (Tin(II) Chloride) with HCl (Hydrochloric Acid)
3. H2S (Hydrogen Sulfide)
4. PbSO4 (Lead(II) Sulfate)

### Step 2: Analyze Each Reagent's Reaction with Ozone
1. **SO2**: When sulfur dioxide reacts with ozone, it produces sulfur trioxide (SO3) and oxygen (O2) as products. Thus, oxygen is produced in this reaction.

Reaction:
\[ SO_2 + O_3 \rightarrow SO_3 + O_2 \]

2. **SnCl2 with HCl**: Tin(II) chloride in the presence of hydrochloric acid acts as a reducing agent. When it reacts with ozone, it forms tin(IV) chloride (SnCl4) and water (H2O), without producing oxygen.

Reaction:
\[ SnCl_2 + O_3 \rightarrow SnCl_4 + H_2O \]

3. **H2S**: Hydrogen sulfide reacts with ozone to produce sulfur dioxide (SO2), water (H2O), and oxygen (O2). Therefore, oxygen is also produced in this reaction.

Reaction:
\[ H_2S + O_3 \rightarrow SO_2 + H_2O + O_2 \]

4. **PbSO4**: Lead(II) sulfate reacts with ozone to produce lead(II) sulfate and oxygen. Thus, oxygen is produced in this reaction as well.

Reaction:
\[ PbSO_4 + O_3 \rightarrow PbSO_4 + O_2 \]

### Step 3: Conclusion
After analyzing all the reactions, we find that the only reagent that does not produce oxygen as one of the products during oxidation with ozone is **SnCl2 with HCl**.

### Final Answer
**The correct answer is SnCl2 (Tin(II) Chloride) with HCl.**

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