Select the option that shows the correct order of percentage of each component in the air in increasing order, that is, the component with lowest percentage is placed first and that with highest is placed last.

Options

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

Answer

To solve the question of arranging the components of air in increasing order based on their percentage, we first need to know the approximate composition of air:

1. **Nitrogen (N2)**: Approximately 78%
2. **Oxygen (O2)**: Approximately 21%
3. **Argon (Ar)**: Approximately 0.93%
4. **Carbon Dioxide (CO2)**: Approximately 0.04%
5. **Other gases**: Trace amounts (less than 0.01%)

Now, let's arrange these components in increasing order of their percentages:

1. **Carbon Dioxide (CO2)**: 0.04%
2. **Argon (Ar)**: 0.93%
3. **Oxygen (O2)**: 21%
4. **Nitrogen (N2)**: 78%

Thus, the correct order of the components in the air from lowest to highest percentage is:

1. Carbon Dioxide (CO2)
2. Argon (Ar)
3. Oxygen (O2)
4. Nitrogen (N2)

### Final Answer:
The correct order of components in air in increasing order of percentage is:
- Carbon Dioxide (CO2) < Argon (Ar) < Oxygen (O2) < Nitrogen (N2)

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