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 KNO3. Saltpetre is a naturally occurring mineral historically used for various purposes, including as a component of gunpowder, fertiliser, and food preservation.
Physical Properties:
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Question : Which of the following is not soluble in water?
Option 1: Lead sulphate
Option 2: Zinc sulphate
Option 3: Potassium sulphate
Option 4: Sodium sulphate
Question : The chemical name of ''Plaster of Paris" commonly used for setting broken bones is
Option 1: Calcium nitrate
Option 2: Calcium sulphate
Option 3: Calcium carbonate
Option 4: Calcium chloride
Question : Which of the following chemicals is used in photography ?
Option 1: Aluminium hydroxide
Option 2: Silver bromide
Option 3: Potassium nitrate
Option 4: Sodium chloride
Question : What is zeolite?
Option 1: Hydrated aluminium silicate
Option 2: Hydrated calcium sulphate
Option 3: Dehydrated aluminosilicate
Option 4: Dehydrated calcium sulphate
Question : The material used in the manufacture of lead pencil is
Option 1: Graphite
Option 2: Lead
Option 3: Carbon
Option 4: MIca
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