Question

The content of the carbon dioxide in the air is 500 ppm(parts per million). What is the content of Oxygen in the air ?

• A. 300 ppm
• B. 150 ppm
• C. 200 ppm
• D. None of these

Answer 1

The correct option is A

300 ppm

From pie chart, we can see that the content of carbon dioxide is 25% which is equal to 500 ppm.

So, total gas present in the atmosphere = $\frac{500\times 100}{25}$ = 2000 ppm

Oxygen content is 15% = $\frac{2000\times 15}{100}$ = 300 ppm.