In which situation is it most appropriate to treat water as the solvent?
Answer and explanation
Correct answer: A substance dissolves in water to form a homogeneous liquid
The governing concept is that water is a solvent when another substance dissolves in it and becomes uniformly distributed. This produces a homogeneous aqueous solution, as described in B. A quantity comparison alone is insufficient to establish the role, especially when the water is not the main medium. A separate layer indicates immiscibility, while sand settling indicates a suspension containing undissolved particles. Therefore B is the only option showing genuine dissolution in water.
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What is the correct answer to this question?
A substance dissolves in water to form a homogeneous liquid
Why is this the correct answer?
The governing concept is that water is a solvent when another substance dissolves in it and becomes uniformly distributed. This produces a homogeneous aqueous solution, as described in B. A quantity comparison alone is insufficient to establish the role, especially when the water is not the main medium. A separate layer indicates immiscibility, while sand settling indicates a suspension containing undissolved particles. Therefore B is the only option showing genuine dissolution in water.
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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