Question detail
Why do nanoparticles have different properties compared to the same material in bulk?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Bulk and surface properties of matter including nanoparticles (chemistry only)
Question
- A. They have a higher mass
- B. They have a larger size
- C. They have a higher surface area to volume ratio
- D. They are made of different atoms
Answer
The correct option is They have a higher surface area to volume ratio. This answer is correct because it matches the approved learning objective to (chemistry only) Explain that surface area to volume ratio increases as particle size decreases in the subtopic Sizes of particles and their properties.
Explanation
The correct option is They have a higher surface area to volume ratio. They have a higher surface area to volume ratio is correct because it directly supports the approved learning objective to (chemistry only) Explain that surface area to volume ratio increases as particle size decreases. This belongs to the subtopic Sizes of particles and their properties within Bulk and surface properties of matter including nanoparticles (chemistry only), so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Sizes of particles and their properties.
Common mistake
Misunderstanding Surface Area to Volume Ratio
Students often think that the surface area to volume ratio remains constant as particle size decreases.
Emphasize that as the size of the particle decreases, the surface area to volume ratio actually increases, which is crucial for understanding the properties of nanoparticles.
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