What is the chemical name of saltpetre?
Answer & explanation
Correct answer: option 1
The correct answer is option 1. Potassium nitrate.
The chemical name of saltpetre is Potassium nitrate
Here's why:
Saltpetre is a common name for a naturally occurring mineral composed of potassium nitrate (KNO₃).
Potassium manganite (KMnO₄) is a different compound known as potassium permanganate, which has a distinct purple color and various uses, but is not commonly referred to as saltpetre.
Lead nitrate (Pb(NO₃)₂) and lead sulfate (PbSO₄) are compounds containing lead and are not related to saltpetre.
Therefore, potassium nitrate is the accurate name for the chemical compound commonly known as saltpetre.