Which option gives an incorrect pair?
Answer and explanation
Correct answer: Salt water: gas in solid solution
The governing concept is that a solution is described by the physical states of its solute and solvent. In salt water, salt is a solid solute and water is a liquid solvent, so it is a solid-in-liquid solution. Therefore option D is incorrect. Air is gas in gas, brass is solid in solid, and carbon dioxide in soda water is gas in liquid, so A, B, and C are correctly paired.
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What is the correct answer to this question?
Salt water: gas in solid solution
Why is this the correct answer?
The governing concept is that a solution is described by the physical states of its solute and solvent. In salt water, salt is a solid solute and water is a liquid solvent, so it is a solid-in-liquid solution. Therefore option D is incorrect. Air is gas in gas, brass is solid in solid, and carbon dioxide in soda water is gas in liquid, so A, B, and C are correctly paired.
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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