When once a pocket of smoke, containing air pollutants, is released into the atmosphere from a source like an automobile or a factory chimney, it gets dispersed into the atmosphere into various directions depending upon the 1. prevailing winds 2. temperature 3. pressure conditions Select the correct answer.
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3Correct
Solution
Concept
Meteorological factors in dispersion
Step-by-step solution
1. Wind transports and dilutes the plume. 2. Temperature (lapse rate) decides stability and mixing. 3. Pressure conditions (high and low pressure systems) control vertical motion and wind patterns.
Explanation
Dispersion of air pollutants is governed by meteorological conditions: wind, temperature structure and atmospheric pressure systems.
Why the other options are wrong
Each of the other options omits a valid factor.
Shortcut
Wind + temperature + pressure.
Common mistake
Ignoring pressure conditions.
Correct answer: D) 1, 2 and 3