Why is the study of dry air useful in atmospheric gaseous composition?
Answer and explanation
Correct answer: Because separating variable water vapour makes comparison of permanent gases clearer
Dry air is a useful reference because water vapour is highly variable in space and time, whereas the principal permanent gases have comparatively stable proportions. By excluding water vapour from the calculation, scientists can compare the relative percentages of nitrogen, oxygen, argon, and other permanent gases more consistently. Hence option A is correct. Dry air still contains gases, including nitrogen and oxygen; it is not oxygen alone or an empty mixture.
Frequently asked questions
What is the correct answer to this question?
Because separating variable water vapour makes comparison of permanent gases clearer
Why is this the correct answer?
Dry air is a useful reference because water vapour is highly variable in space and time, whereas the principal permanent gases have comparatively stable proportions. By excluding water vapour from the calculation, scientists can compare the relative percentages of nitrogen, oxygen, argon, and other permanent gases more consistently. Hence option A is correct. Dry air still contains gases, including nitrogen and oxygen; it is not oxygen alone or an empty mixture.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Introduction to Accounting. Topic: Meaning & Definition.
