The strong smelling substance added to LPG is

Options

A. ethyl mercaptan
B. ethanol
C. ethanal
D. ethyl butane

Explanation

To answer the question, "The strong smelling substance added to LPG is?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding LPG**: Liquefied Petroleum Gas (LPG) is a mixture of propane and butane, which are both odorless gases in their natural state.

2. **Need for an Odorant**: Since LPG is odorless, it is essential to add a substance that has a strong smell. This is crucial for safety reasons, as it helps in detecting gas leaks.

3. **Identifying the Odorant**: The common substance added to LPG for this purpose is Ethyl Mercaptan.

4. **Chemical Composition**: Ethyl Mercaptan, also known as ethanethiol, has the chemical formula C2H6S. Its structural formula can be represented as CH3CH2SH.

5. **Properties of Ethyl Mercaptan**:
- It has a very strong and unpleasant odor, often described as similar to rotten eggs or garlic.
- It is highly volatile, which means it can easily evaporate and disperse in the air, making it easier to detect even in small quantities.

6. **Safety Aspect**: The addition of Ethyl Mercaptan to LPG is a safety measure. In case of a gas leak, the strong smell alerts individuals to the potential danger, allowing them to take necessary precautions.

7. **Conclusion**: Therefore, the strong smelling substance added to LPG is Ethyl Mercaptan.

### Final Answer:
The strong smelling substance added to LPG is Ethyl Mercaptan (C2H6S).

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