Question detail
Which of the following best explains why a reaction between a solid and a liquid proceeds faster when the solid is finely powdered rather than in a single block?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate of reaction
Question
- A. The powdered solid has a larger total volume.
- B. The powdered solid has a larger total surface area exposed to the liquid.
- C. The powdered solid contains more reactive atoms overall.
- D. The powdered solid has a lower density.
Answer
The powdered solid has a larger total surface area exposed to the liquid.
Explanation
The correct answer is The powdered solid has a larger total surface area exposed to the liquid.. This answer directly addresses the question: Which of the following best explains why a reaction between a solid and a liquid proceeds faster when the solid is finely powdered rather than in a single block? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Misunderstanding Surface Area Effect
Students often think that increasing surface area speeds up reactions because it increases the amount of reactant rather than the number of exposed particles available for collisions.
Emphasize that increasing surface area allows more particles to be exposed and available for collisions, which increases the frequency of collisions and thus the reaction rate.
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