Multiple choice general knowledge science & technology

Potassium nitrate is used in

  1. medicine

  2. fertiliser

  3. salt

  4. glass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Potassium nitrate (KNO3, also known as saltpeter) is widely used as a fertilizer because it provides both potassium and nitrogen - two essential nutrients for plant growth. While historically used in gunpowder and some medicines, its primary modern use is in agriculture. It is not used as salt (NaCl), in glass manufacturing, or as a primary pharmaceutical ingredient.

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