MCQOPTIONS
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| 1. |
The Earth's atmosphere is made up of various gases. Which of the following best describes this composition of gases? |
| A. | Oxygen - 78%, Nitrogen - 21%, Others - 1% |
| B. | Oxygen - 60%, Nitrogen - 30%, Others - 10% |
| C. | Nitrogen - 78%, Oxygen - 21%, Others - 1% |
| D. | Nitrogen - 78%, Oxygen - 21%, Carbon dioxide - 1% |
| Answer» D. Nitrogen - 78%, Oxygen - 21%, Carbon dioxide - 1% | |