Find the incorrect statement w.r.t. catalytic converters

Options

A. Platinum-palladium and rhodium acts as catalysts
B. Lead in petrol activates the catalysis
C. Reduces the emission of poisonous gases
D. `CO_(2) and NO_(2)` changed to `CO_(2) and N_(2)` gas

Answer

To find the incorrect statement regarding catalytic converters, we can analyze each given statement step by step.

### Step-by-Step Solution:

1. **Examine the First Statement:**
- **Statement:** "Platinum, Palladium, and Rhodium act as the catalyst."
- **Analysis:** This statement is correct. Catalytic converters use these precious metals as catalysts to facilitate the conversion of harmful gases into less harmful emissions.

2. **Examine the Second Statement:**
- **Statement:** "Lead in petrol activates the catalysis."
- **Analysis:** This statement is incorrect. In fact, lead in petrol poisons the catalyst and inhibits its function. Catalytic converters work best with unleaded petrol, which allows for proper catalytic activity.

3. **Examine the Third Statement:**
- **Statement:** "Reduces the emission of the poisonous gases."
- **Analysis:** This statement is correct. The primary function of catalytic converters is to reduce harmful emissions from vehicles, including carbon monoxide, hydrocarbons, and nitrogen oxides.

4. **Examine the Fourth Statement:**
- **Statement:** "Carbon monoxide and nitrogen oxides change to carbon dioxide and nitrogen gases."
- **Analysis:** This statement is correct. Catalytic converters convert carbon monoxide (a poisonous gas) into carbon dioxide and nitrogen oxides into nitrogen gas, both of which are less harmful.

### Conclusion:
The incorrect statement regarding catalytic converters is the second statement: "Lead in petrol activates the catalysis."

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