Chemicals & uses: Potassium nitrate (KNO3) is commonly used in which of the following? Think of its role as an oxidizer in classical compositions. Choose the correct application.
General Knowledge
General Science
Difficulty: Easy
Choose an option
Answer
Correct Answer: Gunpowder and fireworks (oxidizer in propellants)
Explanation
What is being asked?The principal traditional application of potassium nitrate.
Given data
- Chemical: KNO3 (saltpetre)
Concept/ApproachPotassium nitrate acts as an oxidizer in black powder (classic ratio ~75% KNO3, 15% charcoal, 10% sulfur) and in many pyrotechnic compositions → hence its use in gunpowder and fireworks.
NoteIt also finds use in fertilizers and meat curing, but the hallmark exam answer is its role in propellants/pyrotechnics.
Final AnswerGunpowder and fireworks (oxidizer in propellants)