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. A change that occurs only at the boiling point.
- B. A process where particles escape from the surface of a liquid.
- C. A process that occurs when a solid turns into a gas.
- D. A physical change that requires heating.
Answer
The correct answer is A process where particles escape from the surface of a liquid..
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 A process where particles escape from the surface of a liquid., because changes of state are explained by particle energy and arrangement. In Changes of state, the marking point should connect directly to explain evaporation as particles escaping from the surface of a liquid. 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 143 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.
Common mistake
Evaporation Misunderstanding
Students often think that evaporation occurs only when a liquid is boiling, rather than understanding that it can happen at any temperature from the surface of a liquid.
Emphasize that evaporation occurs when particles at the surface gain enough energy to escape into the air, regardless of the temperature of the liquid.
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