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Question

.......... is used in seeding clouds.


A
Potassium iodide
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B
Calcium carbonate
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C
Sulphur dioxide
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D
Ammonium phosphate
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Solution

The correct option is B Potassium iodide
  • An artificial method of rain is called seeding cloud. It is a type of weather modification.
  • This method aims at to change the amount of precipitation which falls from clouds. The method uses seeding of certain substances into the air that will serve as cloud condensation.
  • In this, tiny particles like potassium iodide or dry ice are seeded (sprayed) in the atmosphere.
  • The water present in the air is attracted and condenses near the sprayed particles.
  • It further crystallises to form ice. Finally, it causes the rainfall.
  • Thus, the correct answer is option A.

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