Q. Which of the following chemical/s is/are used in cloud seeding?
1.Dry Ice
2.Silver Iodide
3.Sodium Chloride
How many of the statements given above are correct?
Answer: C
Notes:
Explanation: Cloud Seeding: It is a weather modification technique to enhance precipitation by dispersing substances into the air that help to saturate the clouds.
Chemicals used: Salts such as silver iodide (AgI), potassium iodide, sodium chloride, or dry ice (solid carbon dioxide).
Source: FORUMIAS

