The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
- Aone
- BfourCorrect
- Ctwo
- Dsix
Solution
Concept
Water vapour content of the troposphere
Step-by-step solution
1. Water vapour is a variable gas in the atmosphere. 2. Its concentration depends on altitude and temperature and varies between 0 and about 4% by volume.
Explanation
Water vapour in the troposphere ranges from almost zero (cold, dry air) to about 4% (warm, humid air). It is the most variable constituent of the atmosphere and the source of all precipitation.
Shortcut
Water vapour: 0 to 4%.
Common mistake
Confusing with the concentration of carbon dioxide (about 0.04%).
Correct answer: B) four