Discussion
Silver iodide is most often dispersed for seeding by
Answer: C
Correct answer: burning it in an acetone solution to produce a fine smoke
A solution of silver iodide in acetone is burnt in a generator, and the vapour condenses into particles of a few hundredths of a micrometre. That is the size wanted: enough particles per gram to be worth releasing, and small enough to be carried into the cloud by the updraught.
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