2018 · Q41
Consider the following constituent gases of the atmosphere:
- 1Argon
- 2Neon
- 3Helium
- 4Carbon dioxide Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?
General KnowledgeGeography
- A1-3-2-4
- B1-4-2-3
- C4-2-3-1
- D2-4-1-3
Explanation
The approximate volume percentages are: argon 0.93%, carbon dioxide 0.04%, neon 0.0018% and helium 0.0005%. Strictly, the ascending order is therefore helium, neon, carbon dioxide, argon (3-2-4-1), which matches none of the four codes given — so the question as framed is defective. The answer keyed is 1-3-2-4 (key disputed)