What is the main reason for keeping water vapour separate in percentage calculation of dry air?
Answer and explanation
Correct answer: The amount of water vapour is highly variable
Dry-air composition is calculated by excluding water vapour because its amount is not constant. It changes with temperature, location, altitude and weather, unlike the principal permanent gases considered in dry air. Thus option A is correct. Water vapour is certainly present in the atmosphere, is not normally a solid, and is not more abundant than nitrogen; those statements cannot explain the separate calculation.
Frequently asked questions
What is the correct answer to this question?
The amount of water vapour is highly variable
Why is this the correct answer?
Dry-air composition is calculated by excluding water vapour because its amount is not constant. It changes with temperature, location, altitude and weather, unlike the principal permanent gases considered in dry air. Thus option A is correct. Water vapour is certainly present in the atmosphere, is not normally a solid, and is not more abundant than nitrogen; those statements cannot explain the separate calculation.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
