Saltpetre has the chemical formula:
Correct answer: A. KNO3
- A. KNO3
- B. KNO2
- C. Na2B4O7
- D. Na2CO3 . H2O
Explanation
Potassium nitrate has the chemical formula KNO3, and it is commonly known as saltpetre or saltpeter. It is used in fertilizers, food preservation, and as an oxidizing agent in fireworks.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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