UPSC Previous Year Question | Prelims GS | 2025

Artificial way of causing rainfall to reduce air pollution makes use of

  1. silver iodide and potassium iodide
  2. silver nitrate and potassium iodide
  3. silver iodide and potassium nitrate
  4. silver nitrate and potassium chloride

Answer

Correct Answer

silver iodide and potassium iodide

Explanation

Artificial rainfall (cloud seeding) commonly uses substances such as silver iodide and potassium iodide as cloud condensation/ice nuclei, which promote the formation of raindrops or ice crystals in suitable clouds, thereby inducing precipitation to help settle pollutants and reduce air pollution.

Topics: air pollution, cloud seeding, science and technology