Question

The CO2 content by volume, in the atmospheric air is about

• A. 0.0334
• B. 0.04
• C. 0.000314
• D. 0.34%.

Answer 1

The Correct Option is C

The question asks for the percentage of CO₂ content by volume in atmospheric air. Let's look at the options and determine the correct answer.

1. The standard concentration of CO₂ in the Earth's atmosphere is approximately 0.03% to 0.04% by volume. This converts to a fractional value of 0.0003 to 0.0004 by volume.
2. Analyzing the options provided:
   • 0.0334
     - This suggests 3.34% CO₂, which is excessively high and not consistent with atmospheric values.
   • 0.04
     - This suggests 4.00% CO₂, also too high for standard atmospheric content.
   • 0.000314
     - This translates to 0.0314% CO₂, which is within the expected natural range of 0.03% to 0.04%.
   • 0.34%
     - This equates to 0.34% CO₂, which is still too high when compared to typical atmospheric levels.
3. The correct answer,
   0.000314
   , aligns with what is known about the typical atmospheric CO₂ concentrations.

It is important to understand that atmospheric CO₂ is a critical measure of global climate patterns, and even small variations in this concentration can have significant environmental impacts.

In conclusion, the correct CO₂ content by volume in atmospheric air, as typically observed, is 0.000314, which is equivalent to 0.0314%.