In which option does only the solute state change while the solvent remains water?
Answer and explanation
Correct answer: Salt in water and oxygen in water
The relevant principle is to compare the solute and solvent in each pair. In salt water, salt is a solid solute; in oxygenated water, oxygen is a gaseous solute. In both cases, water remains the liquid solvent, so only the solute state changes. The other options do not keep water as the common solvent: brass and bronze are solid alloys, air and smoke are gas-containing mixtures, and D uses solid metallic solvents.
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What is the correct answer to this question?
Salt in water and oxygen in water
Why is this the correct answer?
The relevant principle is to compare the solute and solvent in each pair. In salt water, salt is a solid solute; in oxygenated water, oxygen is a gaseous solute. In both cases, water remains the liquid solvent, so only the solute state changes. The other options do not keep water as the common solvent: brass and bronze are solid alloys, air and smoke are gas-containing mixtures, and D uses solid metallic solvents.
Which subject and chapter does this question cover?
This is a Class 9 Science question. Chapter: Exploring Mixtures and Their Separation. Topic: Solute and solvent.
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