Which option is least likely to form a true solution because homogeneity is absent?
Answer and explanation
Correct answer: Separate layers of water and oil
A true solution must be homogeneous, meaning its composition is the same throughout and no separate layers are visible. Water and oil are immiscible, so they remain in separate layers; this proves the mixture is heterogeneous and not a true solution. A single layer of water and alcohol, completely dissolved salt water, and uniformly mixed air satisfy the required homogeneity under the stated conditions. Hence C is correct.
Frequently asked questions
What is the correct answer to this question?
Separate layers of water and oil
Why is this the correct answer?
A true solution must be homogeneous, meaning its composition is the same throughout and no separate layers are visible. Water and oil are immiscible, so they remain in separate layers; this proves the mixture is heterogeneous and not a true solution. A single layer of water and alcohol, completely dissolved salt water, and uniformly mixed air satisfy the required homogeneity under the stated conditions. Hence C is correct.
Which subject and chapter does this question cover?
This is a Class 9 Science question. Chapter: Exploring Mixtures and Their Separation. Topic: Homogeneous and heterogeneous mixtures.
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