Which of these is not a characteristic of natural gas?

Options

A. It is foul smelling.
B. It is non polluting
C. It is higher than air.
D. It is highly flammable

Answer

To determine which of the options is not a characteristic of natural gas, we need to analyze the known characteristics of natural gas based on the information provided. Here’s a step-by-step breakdown:

### Step 1: Identify the Characteristics of Natural Gas
Natural gas has several well-known characteristics:
1. **Odorless**: Natural gas is typically odorless. However, for safety reasons, a substance called mercaptan is added to give it a smell (often likened to rotten eggs) to detect leaks.
2. **Colorless**: Natural gas does not have any color.
3. **Cleaner Fuel**: It is considered a cleaner fuel compared to other fossil fuels because it produces fewer pollutants when burned.
4. **Lighter than Air**: Natural gas is lighter than air, which means it will rise if released into the atmosphere.
5. **Highly Flammable**: Natural gas is highly flammable and is used for cooking and heating purposes.

### Step 2: Analyze the Options
Now, we need to evaluate the options provided in the question to identify which one does not fit the characteristics of natural gas.

### Step 3: Identify the Incorrect Characteristic
If one of the options states that natural gas has a strong odor or is heavier than air, then that would be the characteristic that does not apply to natural gas.

### Conclusion
Based on the characteristics listed, the option that states natural gas has a strong odor or is heavier than air would be the correct answer to the question, as these are not characteristics of natural gas.

### Final Answer
The characteristic that is NOT true for natural gas is that it has a strong odor or is heavier than air.

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