Question : Saltpetre is another name for ______.
Option 1: sodium chloride
Option 2: potassium nitrate
Option 3: potassium chloride
Option 4: sodium hydroxide
Correct Answer: potassium nitrate
Solution : The correct option is potassium nitrate .
Potassium nitrate is also known by the name saltpetre. It is a chemical substance with a variety of uses that naturally exists as a mineral. As one of the main components of conventional gunpowder formulations, saltpetre has a long history of use in the manufacture of gunpowder. It can also be used in some fertilizers, as a food additive and for food preservation.
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