Which option contains only examples related to gaseous solutions?
Answer and explanation
Correct answer: Air and oxygen in nitrogen
The governing concept is that the physical state of a solution is generally identified by the state of its solvent. A gaseous solution has a gas as its solvent. Air is a homogeneous mixture of gases, and oxygen mixed uniformly with nitrogen has nitrogen as the gaseous solvent. In B and D, water is the liquid solvent, whereas brass and bronze in C are solid alloys. Therefore, only A contains gaseous-solution examples.
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What is the correct answer to this question?
Air and oxygen in nitrogen
Why is this the correct answer?
The governing concept is that the physical state of a solution is generally identified by the state of its solvent. A gaseous solution has a gas as its solvent. Air is a homogeneous mixture of gases, and oxygen mixed uniformly with nitrogen has nitrogen as the gaseous solvent. In B and D, water is the liquid solvent, whereas brass and bronze in C are solid alloys. Therefore, only A contains gaseous-solution examples.
Which subject and chapter does this question cover?
This is a Class 9 Science question. Chapter: Exploring Mixtures and Their Separation. Topic: Solutions.
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