Question
Other than nitrogen and oxygen, which one of the following is the next most abundant gas in the dry air of lower atmosphere ?
| A. |
Argon |
| B. |
Carbon dioxide |
| C. |
Helium |
| D. |
Hydrogen |
Show Answer
Other than nitrogen and oxygen, which one of the following is the next most abundant gas in the dry air of lower atmosphere ?
| A. |
Argon |
| B. |
Carbon dioxide |
| C. |
Helium |
| D. |
Hydrogen |
