Which one is not a property of ozone?

Options

A. it acts as an oxidising agent in dry state.
B. oxidation of `KI" into "KIO_(2).`
C. PbS is oxidised to `PbSO_(4)`
D. Hg is oxidised to `Hg_(2)O`.

Explanation

To determine which option is not a property of ozone (O3), we will analyze the properties and reactions of ozone step by step.

### Step 1: Understanding Ozone
Ozone is a triatomic molecule consisting of three oxygen atoms. It is known for its strong oxidizing properties.

**Hint:** Recall that ozone is a molecule made up of three oxygen atoms and is often found in the Earth's stratosphere.

### Step 2: Identifying Ozone's Properties
Ozone has several notable properties:
- It acts as a strong oxidizing agent.
- It can oxidize various substances, such as lead sulfide and potassium iodide.

**Hint:** Think about how ozone interacts with other compounds and what products are formed during these reactions.

### Step 3: Analyzing Reactions of Ozone
1. **Reaction with Lead Sulfide (PbS):**
\[ \text{PbS} + \text{O}_3 \rightarrow \text{PbSO}_4 + \text{O}_2 \]
This shows that ozone oxidizes lead sulfide to lead sulfate.

2. **Reaction with Potassium Iodide (KI):**
\[ \text{KI} + \text{H}_2\text{O} + \text{O}_3 \rightarrow \text{KOH} + \text{I}_2 + \text{O}_2 \]
Here, ozone oxidizes potassium iodide to potassium hydroxide and iodine.

3. **Reaction with Mercury (Hg):**
\[ \text{Hg} + \text{O}_3 \rightarrow \text{Hg}_2\text{O} + \text{O}_2 \]
Ozone oxidizes mercury to mercury oxide.

**Hint:** Review the products formed in these reactions to understand the oxidizing nature of ozone.

### Step 4: Evaluating the Given Options
Now, let's evaluate the options provided in the question:
- **Option A:** Ozone acts as an oxidizing agent in dry state. (Correct)
- **Option B:** Ozone oxidizes potassium iodide into KIO2. (Incorrect, it forms KOH and I2)
- **Option C:** Lead sulfide is oxidized to lead sulfate. (Correct)
- **Option D:** Mercury is oxidized into mercury oxide. (Correct)

**Hint:** Compare each option with the reactions we analyzed to see if they align with ozone's known properties.

### Step 5: Conclusion
From the analysis, we can conclude that **Option B** is not a property of ozone, as it incorrectly states the product of the reaction with potassium iodide.

**Final Answer:** The option that is not a property of ozone is **Option B: Oxidation of potassium iodide into KIO2.**