The rate-determining step in a multi-step reaction is:

A The fastest step

B The slowest step

C The last step

D The step with highest temperature

✓ Correct Answer: Option B

The rate-determining (rate-limiting) step is the slowest step, which acts as a bottleneck controlling the overall reaction rate.

💡 Why is B) the correct answer?

The correct answer to the question "The rate-determining step in a multi-step reaction is:" is Option B: The slowest step.

The other options — A) The fastest step, C) The last step, D) The step with highest temperature — are incorrect for this MCAT Exam Prep question. As explained above: The rate-determining (rate-limiting) step is the slowest step, which acts as a bottleneck controlling the overall reaction rate.

📚 About This MCAT Exam Prep Practice Question

This 1-level MCAT Exam Prep question from the Chemical & Physical Foundations topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free MCAT Exam Prep practice test or use flashcards for spaced repetition review.

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The rate-determining step in a multi-step reaction is:

✓ Correct Answer: Option B

📚 About This MCAT Exam Prep Practice Question

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