MDCAT Reaction Kinetics MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
4
Selected Topics
4
Available MCQs
743
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 743 total questions. Test will draw 50 shuffled MCQs.
Sample Reaction Kinetics MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Reaction Rate
1. Instantaneous rate of reaction is at:
- A. At equilibrium
- B. One instant
- C. Given temperature
- D. Given pressure
View answer and explanation
Answer: B. One instant
The instantaneous rate is the rate at a particular moment, found from the slope of the concentration-time curve at that point. It is not restricted to equilibrium or to fixed temperature and pressure. Hence it is the rate at one instant.
Rate Constant
2. Adding a suitable catalyst generally changes the rate constant because it:
- A. changes the balanced equation
- B. increases reactant molar masses
- C. provides a lower-activation-energy pathway
- D. alters the equilibrium constant
View answer and explanation
Answer: C. provides a lower-activation-energy pathway
A catalyst changes the reaction pathway and therefore the kinetic constant.
Reaction Rate
3. Chemical kinetics is the branch of chemistry that deals with:
- A. Energy changes in reactions
- B. Rate of reactions and their mechanisms
- C. Structure of molecules
- D. Equilibrium constants only
View answer and explanation
Answer: B. Rate of reactions and their mechanisms
Chemical kinetics studies how fast reactions occur (reaction rates) and the step-by-step pathway (mechanism) by which they happen. Energy changes belong to thermochemistry and equilibrium constants to thermodynamics.
About this unit
MDCAT Reaction Kinetics — Unit 23
743 practice MCQs covering Reaction Rate, Rate Factors, Reaction Order, Rate Constant. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Reaction Kinetics practice
How many Reaction Kinetics MCQs are available on DIFF. MDCAT?
The current Reaction Kinetics question bank contains 743 practice MCQs across 4 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Reaction Kinetics quiz cover?
The selectable topics are Reaction Rate, Rate Factors, Reaction Order, Rate Constant. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Reaction Kinetics test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Reaction Kinetics quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Reaction Kinetics MCQs to improve?
Start with a short tutor drill on one of these topics: Reaction Rate, Rate Factors, Reaction Order. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.