Which of the following is mixed with a volatile liquid (ethyl mercaptan) to make it smell strongly?

Options

A. Coal gas
B. CNG
C. LPG
D. Hydrogen

Answer

To solve the question "Which of the following is mixed with a volatile liquid (ethyl mercaptan) to make it smell strongly?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is asking about a substance that is mixed with ethyl mercaptan to enhance its smell. Ethyl mercaptan itself is known for its strong odor.

**Hint**: Think about why a substance would need to be made more detectable.

2. **Identify the Substance**: The question suggests that there is a specific volatile liquid that is odorless on its own. Ethyl mercaptan is often used to give a smell to substances that are otherwise odorless.

**Hint**: Consider common gases or fuels that are typically odorless.

3. **Consider Common Examples**: One common example of an odorless gas is LPG (Liquefied Petroleum Gas). LPG is used widely for cooking and heating but does not have a smell.

**Hint**: Recall that safety measures are often taken with gases to prevent accidents.

4. **Connect Ethyl Mercaptan with LPG**: Ethyl mercaptan is specifically added to LPG to provide a strong smell. This is crucial for safety, as it allows people to detect gas leaks.

**Hint**: Think about the purpose of adding a strong-smelling substance to a gas.

5. **Conclusion**: Therefore, the answer to the question is that ethyl mercaptan is mixed with LPG to make it smell strongly.

### Final Answer:
**LPG (Liquefied Petroleum Gas)** is mixed with ethyl mercaptan to make it smell strongly.

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