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Which of the following pairs is correctly matched? (SSC CGL 2nd Sit. 2012)
- a)Milk of lime–sodium sulphate
- b)Glauber’s salt–calcium sulphate
- c)Salt petre–potassium nitrate
- d)Gypsum–calcium hydroxide
Correct answer is option 'C'. Can you explain this answer?
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Which of the following pairs is correctly matched? (SSC CGL 2nd Sit....
Potassium Nitrate occurs as a mineral niter and is a natural solid source of nitrogen. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter.
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Which of the following pairs is correctly matched? (SSC CGL 2nd Sit....
Correct Match Explanation
The correct answer to the question regarding the correctly matched pairs is option 'C': Salt petre – potassium nitrate.
Understanding the Terms
- **Salt petre**: This is a common name for potassium nitrate, a chemical compound with the formula KNO₃. It is widely used in fertilizers, food preservation, and as a component in gunpowder.
- **Potassium nitrate**: This compound is a naturally occurring mineral source of nitrogen. It is soluble in water and is known for its ability to provide essential nutrients to plants.
Analysis of Other Options
- **a) Milk of lime – sodium sulphate**:
- Milk of lime refers to a suspension of calcium hydroxide (Ca(OH)₂) in water, not sodium sulfate (Na₂SO₄).
- **b) Glauber’s salt – calcium sulphate**:
- Glauber’s salt is sodium sulfate decahydrate (Na₂SO₄·10H₂O), not calcium sulfate (CaSO₄).
- **d) Gypsum – calcium hydroxide**:
- Gypsum is calcium sulfate dihydrate (CaSO₄·2H₂O), while calcium hydroxide is a different compound altogether.
Conclusion
In summary, the only correctly matched pair is "Salt petre – potassium nitrate," making option 'C' the right answer. The other options incorrectly associate compounds with their names, reinforcing the importance of accurately identifying chemical substances.
The correct answer to the question regarding the correctly matched pairs is option 'C': Salt petre – potassium nitrate.
Understanding the Terms
- **Salt petre**: This is a common name for potassium nitrate, a chemical compound with the formula KNO₃. It is widely used in fertilizers, food preservation, and as a component in gunpowder.
- **Potassium nitrate**: This compound is a naturally occurring mineral source of nitrogen. It is soluble in water and is known for its ability to provide essential nutrients to plants.
Analysis of Other Options
- **a) Milk of lime – sodium sulphate**:
- Milk of lime refers to a suspension of calcium hydroxide (Ca(OH)₂) in water, not sodium sulfate (Na₂SO₄).
- **b) Glauber’s salt – calcium sulphate**:
- Glauber’s salt is sodium sulfate decahydrate (Na₂SO₄·10H₂O), not calcium sulfate (CaSO₄).
- **d) Gypsum – calcium hydroxide**:
- Gypsum is calcium sulfate dihydrate (CaSO₄·2H₂O), while calcium hydroxide is a different compound altogether.
Conclusion
In summary, the only correctly matched pair is "Salt petre – potassium nitrate," making option 'C' the right answer. The other options incorrectly associate compounds with their names, reinforcing the importance of accurately identifying chemical substances.
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Which of the following pairs is correctly matched? (SSC CGL 2nd Sit. 2012)a)Milk of lime–sodium sulphateb)Glauber’s salt–calcium sulphatec)Salt petre–potassium nitrated)Gypsum–calcium hydroxideCorrect answer is option 'C'. Can you explain this answer?
Question Description
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