Which of the following substances is added to LPG to give it a peculiar smell?

Options

A. Ethyl alcohol
B. Tetraethyl lead
C. Ethyl mercaptan
D. Mustard oil

Explanation

To solve the question about which substance is added to LPG (Liquefied Petroleum Gas) to give it a peculiar smell, we can follow these steps:

### Step 1: Understand what LPG is
LPG, or Liquefied Petroleum Gas, is a mixture of hydrocarbon gases, primarily propane and butane, that is used as fuel for heating, cooking, and in vehicles.

**Hint:** Remember that LPG is a mixture of gases that are typically odorless.

### Step 2: Identify the need for odor in LPG
Since LPG is odorless, a substance is added to it to help detect leaks. This is crucial for safety reasons, as it allows people to smell gas in case of a leak.

**Hint:** Think about why it is important to detect gas leaks in household and industrial settings.

### Step 3: Determine the common odorant used
The substance commonly added to LPG to give it a distinctive smell is ethyl mercaptan (also known as ethanethiol). This compound has a strong, unpleasant odor that is easily recognizable.

**Hint:** Consider what types of chemicals are typically used to impart strong odors for safety purposes.

### Step 4: Conclusion
Therefore, the substance added to LPG to give it a peculiar smell is ethyl mercaptan.

**Final Answer:** Ethyl mercaptan is added to LPG to give it a peculiar smell.