Catalytic converters, which are fitted into automobiles for reducing the emission of poisonous gases possess which of the following metals as catalyst ?

Options

A. Platinum - Palladium
B. Rhodium
C. Lead
D. Both (a) & (b)

Answer

To solve the question regarding the metals used as catalysts in catalytic converters, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Catalytic Converters**:
- Catalytic converters are devices installed in automobiles to reduce the emission of toxic gases. They convert harmful pollutants into less harmful emissions.

2. **Identify the Types of Reactions Involved**:
- The process in catalytic converters involves redox reactions, which include both oxidation and reduction processes.

3. **List the Metals Used as Catalysts**:
- The primary metals used in catalytic converters as catalysts are:
- **Platinum**: Known for its high activity in catalyzing reactions.
- **Palladium**: Used for oxidation reactions.
- **Rhodium**: Used for reduction reactions.

4. **Evaluate the Options Provided**:
- The options given are:
- Platinum
- Palladium
- Rhodium
- Lead
- A and B both (which implies Platinum and Palladium)
- Since Platinum, Palladium, and Rhodium are all used in catalytic converters, we can conclude that the correct answer includes more than one option.

5. **Select the Correct Answer**:
- The correct answer is "A and B both," which indicates that both Platinum and Palladium are used as catalysts in catalytic converters.

### Final Answer:
The metals used as catalysts in catalytic converters are Platinum, Palladium, and Rhodium. Therefore, the correct answer is "A and B both."

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