Question detail
Which of the following best describes evaporation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Changes of state and the particle model
Question
- A. It occurs at a specific temperature.
- B. It happens only when the liquid is heated.
- C. It can occur at any temperature and only at the surface.
- D. It is a process that requires a chemical change.
Answer
The correct answer is It can occur at any temperature and only at the surface..
Explanation
Exam lens: Write the relationship, substitute values only when needed, and finish by interpreting the result. This question asks: Which of the following best describes evaporation. The correct response is It can occur at any temperature and only at the surface., because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to distinguish boiling from evaporation using where and how the change occurs. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 167 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.
Common mistake
Boiling vs. Evaporation Confusion
Students often confuse boiling with evaporation, thinking they are the same process.
Emphasize that boiling occurs throughout the liquid at a specific temperature, while evaporation happens only at the surface at any temperature.
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