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 about which factor will inactivate the process of catalysis in the catalytic converters fitted in automobiles, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Catalytic Converters**:
- Catalytic converters are devices used in automobiles to reduce the emission of harmful gases. They contain catalysts made from precious metals such as platinum, palladium, and rhodium.

2. **Function of Catalysts**:
- These catalysts facilitate chemical reactions that convert harmful gases (like unburnt hydrocarbons, carbon monoxide, and nitrogen oxides) into less harmful substances (like carbon dioxide and nitrogen gas).

3. **Identifying the Problem**:
- The question asks which option will inactivate the catalytic process in these converters.

4. **Analyzing the Options**:
- The options given are:
- A) Running very fast
- B) Use of leaded petrol
- C) Using BS-IV fuel
- D) Use of low sulphur fuel

5. **Evaluating Each Option**:
- **A) Running very fast**: This does not directly affect the catalytic process.
- **B) Use of leaded petrol**: Lead in petrol is known to coat the catalyst and inhibit its activity, thus inactivating the catalysis.
- **C) Using BS-IV fuel**: This is a standard for fuel quality and does not inactivate the catalyst.
- **D) Use of low sulphur fuel**: Low sulphur fuel is actually beneficial for catalytic converters as it reduces the formation of harmful sulphur compounds.

6. **Conclusion**:
- The correct answer is **B) Use of leaded petrol**, as it directly inactivates the catalysts in catalytic converters.

### Final Answer:
**B) Use of leaded petrol**

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