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
Correct Answer: Potassium nitrate, sulphur and charcoal
Solution : The correct answer is Potassium nitrate, sulphur and charcoal.
Potassium nitrate, sulphur and charcoal are used in the gunpowder of fireworks. The composition of gunpowder is around 75% potassium nitrate, 15% charcoal and 10% sulphur. Charcoal and sulphur work like fuel and potassium nitrate is an oxidiser.
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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 is widely used in making semiconductor chips?
Option 1: Radium
Option 2: Sodium
Option 3: Germanium
Option 4: Sulphur
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
Question : Saltpetre is another name for ______.
Option 1: sodium chloride
Option 2: potassium nitrate
Option 3: potassium chloride
Option 4: sodium hydroxide
Question : Which of the following is used for the preparation of Dynamite?
Option 1: Methyl alcohol
Option 2: Iron oxide
Option 3: Nitroglycerin
Option 4: Copper sulphate
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