In petrochemical industry , alcohols are directly converted to gasoline by passing over heated :-

Options

A. Platinum
B. Nickel
C. Palladium
D. ZSM - 5

Answer

To solve the question regarding the conversion of alcohols to gasoline in the petrochemical industry, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process**: The question states that alcohols are converted to gasoline. This process is significant in the petrochemical industry, where alcohols serve as feedstock for producing fuels.

2. **Identifying the Type of Reaction**: The conversion of alcohols to gasoline can be classified as a catalytic process. Specifically, it involves the use of a catalyst that facilitates the transformation of alcohols into hydrocarbons, which are the primary components of gasoline.

3. **Recognizing the Catalysts Used**: In the petrochemical industry, shape-selective catalysis is often employed. This type of catalysis allows for the selective conversion of reactants based on their molecular shape, leading to the desired product with minimal by-products.

4. **Identifying the Specific Catalyst**: ZSM-5 (Zeolite Socony Mobil-5) is a well-known catalyst used in the petrochemical industry for this purpose. It is a type of zeolite that is particularly effective in shape-selective catalysis, making it suitable for converting alcohols to gasoline.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is that alcohols are directly converted to gasoline by passing over heated **ZSM-5**.

### Final Answer:
The correct option is **D. ZSM-5**.

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