Which of the following will inactivate the process of catalysis in the catalytic converters fitted in automobiles ?

Options

A. Running very fast
B. Use of leaded petrol
C. Using BS IV fuel
D. Use of low sulphur fuel

Answer

To solve the question regarding what inactivates the process of catalysis in catalytic converters fitted in automobiles, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Catalytic Converters**:
- Catalytic converters are devices used in vehicles to reduce harmful emissions. They facilitate redox reactions that convert toxic pollutants into less harmful substances.

2. **Identify the Catalysts Used**:
- The catalytic converters typically contain precious metals such as platinum, palladium, and rhodium. These metals act as catalysts to promote the necessary chemical reactions.

3. **Recognize the Impact of Leaded Petrol**:
- The presence of lead in leaded petrol is known to poison the catalysts. Lead can bind to the active sites of these metals, rendering them ineffective for catalysis.

4. **Evaluate the Options Given**:
- Option 1: Running very fast - This does not inactivate the catalytic process.
- Option 2: Use of leaded petrol - This is known to inactivate the catalysts.
- Option 3: Using BS IV fuel - This type of fuel is designed to be cleaner and does not inactivate the catalysts.
- Option 4: Use of low sulfur fuel - This also does not inactivate the catalytic process.

5. **Conclusion**:
- Based on the evaluation, the correct answer is that the use of leaded petrol will inactivate the process of catalysis in catalytic converters.

### Final Answer:
The use of leaded petrol (Option 2) will inactivate the process of catalysis in the catalytic converters fitted in automobiles.

---