Highest percentage of air consists of

Options

A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Argon

Explanation

To answer the question about which gas has the highest percentage in the air, we can follow these steps:

### Step 1: Identify the Components of Air
Air is a mixture of different gases present in the atmosphere. The main components include nitrogen, oxygen, carbon dioxide, argon, and water vapor.

### Step 2: Determine the Percentages of Each Gas
- **Nitrogen (N2)**: Approximately 78%
- **Oxygen (O2)**: Approximately 21%
- **Carbon Dioxide (CO2)**: Approximately 0.3%
- **Argon (Ar)**: Approximately 0.97%
- **Water Vapor**: Approximately 1%

### Step 3: Compare the Percentages
Now, we compare the percentages of each gas:
- Nitrogen: 78%
- Oxygen: 21%
- Carbon Dioxide: 0.3%
- Argon: 0.97%
- Water Vapor: 1%

### Step 4: Identify the Highest Percentage
From the comparison, it is clear that nitrogen has the highest percentage in the air at 78%.

### Conclusion
The highest percentage of air consists of **Nitrogen**.

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