Q. Which among the following statements is/are correct about Fog and Mist?

1. Fog contains more moisture than mist
2. Fog is formed generally when warm & cold currents meet
3. Fog is a cloud with its base at or very near to ground.
4. Mist is formed frequently over the mountains when rising warm air up the slopes meet cold surfaces

Select the correct code from the options given below:
Answer: Only 2, 3 & 4
Notes: When temperature of an air mass containing large quantity of water vapour falls all of a sudden, condensation takes place on fine dust & smoke particles. This is called fog. Fog is a cloud with its base at or very near to ground. It is formed generally when warm & cold currents meet. Mist is formed frequently over the mountains when rising warm air up the slopes meet cold surfaces.
Mist contains more moisture than fog and each nuclei in mist contains thicker layer of moisture.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.