MCQOPTIONS
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| 1. |
Arrange the following components in decreasing order according to their percentage present in air. |
| A. | Nitrogen, Oxygen, Argon, Carbon dioxide. |
| B. | Oxygen, Argon, Carbon dioxide, Nitrogen. |
| C. | Nitrogen, Carbon dioxide, Oxygen, Argon. |
| D. | Nitrogen, Oxygen, Carbon dioxide, Argon. |
| E. | None of these |
| Answer» B. Oxygen, Argon, Carbon dioxide, Nitrogen. | |