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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Question : Which of the following is the main compound of voter ink?
Option 1: Silver nitrate
Option 2: Ammonium chloride
Option 3: Silver chloride
Option 4: Ammonium nitrate
Question : Which of the following chemicals are widely used in gunpowder of fireworks?
Option 1: Silver nitrate and charcoal
Option 2: Silver nitrate and sulphur
Option 3: Potassium sulphate and phosphorous
Option 4: Potassium nitrate, sulphur and charcoal
Question : Which of the following is not a food preservative?
Option 1: Aqua regia
Option 2: Vinegar
Option 3: Sodium chloride
Option 4: Sodium nitrite
Question : Dry powder fire extinguishers contain:
Option 1: sand
Option 2: sand and sodium carbonate
Option 3: sand and potassium carbonate
Option 4: sand and sodium bicarbonate
Question : Aluminium salt commonly used to stop bleeding is:
Option 1: Aluminium nitrate
Option 2: Aluminium sulphate
Option 3: Aluminium chloride
Option 4: Potash alum
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