LPG is predominantly a mixture of propane and:

Options

A. methane
B. isopropane
C. butanc
D. ethane

Explanation

To solve the question "LPG is predominantly a mixture of propane and:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand LPG**: LPG stands for Liquefied Petroleum Gas. It is a type of fuel that is used for heating, cooking, and in vehicles.

2. **Identify the Components of LPG**: LPG is primarily composed of two hydrocarbons: propane and butane.

3. **Recognize the Characteristics of Propane and Butane**:
- Propane (C3H8) is a three-carbon alkane.
- Butane (C4H10) is a four-carbon alkane.
- Both of these gases are colorless and odorless in their pure form.

4. **Detecting LPG Leaks**: Since propane and butane are odorless, a chemical called methyl mercaptan (CH3SH) is added to LPG to give it a distinct smell. This helps in detecting leaks.

5. **Conclusion**: Given that LPG is predominantly a mixture of propane and butane, the answer to the question is butane.

### Final Answer:
LPG is predominantly a mixture of propane and **butane**.

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