Which is not true for ozone ?

Options

A. It oxidizes lead sulphate
B. It oxidizes potassium iodide
C. It oxidizes mercury .
D. It cannot act as bleaching agent

Answer

To determine which statement is not true for ozone, we can analyze the properties of ozone and the options provided. Here’s a step-by-step solution:

### Step 1: Understand the Properties of Ozone
Ozone (O₃) is a molecule made up of three oxygen atoms. It has several important properties:
- Ozone is a powerful oxidizing agent.
- It can decompose to release nascent (active) oxygen.
- Ozone is known for its ability to act as a bleaching agent.
- It has a distinct smell and is found in the Earth's stratosphere.

### Step 2: Analyze the Options
Let’s evaluate the statements provided in the options to identify which one is not true about ozone.

1. **Option A**: Ozone is a powerful oxidizing agent.
2. **Option B**: Ozone can decompose to give nascent oxygen.
3. **Option C**: Ozone has a distinct smell.
4. **Option D**: Ozone cannot act as a bleaching agent.

### Step 3: Evaluate Each Option
- **Option A**: True. Ozone is indeed a powerful oxidizing agent.
- **Option B**: True. Ozone decomposes to give nascent oxygen, which is a reactive form of oxygen.
- **Option C**: True. Ozone has a characteristic sharp smell.
- **Option D**: Not true. Ozone can act as a bleaching agent due to its ability to release nascent oxygen.

### Step 4: Conclusion
After evaluating all the options, we find that **Option D** is not true for ozone. Ozone can indeed act as a bleaching agent.

### Final Answer
**Option D: Ozone cannot act as a bleaching agent** is the statement that is not true for ozone.

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