Question detail
If two reactions have product‑vs‑time curves that intersect at 20 s, but one curve is steeper at that point, what can be concluded about their rates at 20 s?
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. Both reactions have the same rate at 20 s.
- B. The reaction with the steeper curve has a higher rate at 20 s.
- C. The reaction with the shallower curve has a higher rate at 20 s.
- D. The intersection point indicates zero rate for both reactions.
Answer
The reaction with the steeper curve has a higher rate at 20 s.
Explanation
The correct answer is The reaction with the steeper curve has a higher rate at 20 s.. This answer directly addresses the question: If two reactions have product‑vs‑time curves that intersect at 20 s, but one curve is steeper at that point, what can be concluded about their rates at 20 s? 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
Misinterpreting Tangents
Students often incorrectly draw tangents that do not touch the curve at the point of interest, leading to inaccurate rate estimates.
Ensure the tangent line touches the curve at the specific time point and is drawn so that it represents the slope accurately at that moment.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.