Question : What is the chemical name of saltpetre?
Option 1: Potassium nitrate
Option 2: Potassium manganite
Option 3: Lead nitrate
Option 4: Lead sulphate
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Correct Answer: Potassium nitrate
Solution : The correct option is Potassium nitrate .
Its chemical formula is KNO 3. Saltpetre is a naturally occurring mineral historically used for various purposes, including as a component of gunpowder, fertiliser, and food preservation.
Physical Properties:
- Potassium nitrate is a colourless and odourless crystalline salt.
- It is soluble in water.
- It has a high melting point of about 334 degrees Celsius (633.2 degrees Fahrenheit).
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