1Chemistryunits of rate constant
The unit of the rate constant is the same as that of the rate of reaction in:
- A.Zero order reaction
- B.First order reaction
- C.Second order reaction
- D.Third order reaction
Answer and explanation locked
Reaction Kinetics MCQs for MDCAT
4 Reaction Kinetics questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.
4 questionsChemistry
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2Chemistrydefinition of kinetics
The study of rates of chemical reactions and the factors that affect the rates of chemical reactions is known as:
- A.Thermodynamics
- B.Stoichiometry
- C.Electrochemistry
- D.Chemical kinetics
Answer and explanation locked
3Chemistryreaction order determination
For the reaction A(g) -> products, when the concentration of A(g) doubles, the rate of reaction increases four fold, which means it is:
- A.Negative order reaction
- B.First order reaction
- C.Zero order reaction
- D.Second order reaction
Answer and explanation locked
4Chemistrynegative order reactions
For which of the following order of the reaction, rate of reaction in inversely proportional to the concentration reaction?
- A.1st order reaction
- B.2nd order reaction
- C.Negative order of reaction
- D.Zero order of reaction
Answer and explanation locked
How Reaction Kinetics is examined
Reaction Kinetics sits in the official PMDC Chemistry curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.
Chemistry carries 45 of the 180 questions in the real paper - 25% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 45questions are split across chapters, so no honest page can tell you “expect four from Reaction Kinetics”. What the archive can tell you is what actually appeared: 4 Reaction Kinetics questions out of the 48 Chemistry questions digitised so far.
Work through them with the explanations rather than checking answer letters. The explanation says why the other three options are wrong, and distractors get reused across years far more reliably than whole questions do.
Frequently asked questions
How many Reaction Kinetics MCQs are on this page?
4, drawn from one past paper - the 2020 paper. Every one is transcribed from the real paper rather than written to look like a past paper question, and each carries the correct answer with a written explanation. 0 of them are readable in full without an account.
Is Reaction Kinetics in the MDCAT 2026 syllabus?
Yes. Reaction Kinetics is a chapter of the official PMDC Chemistry curriculum, and PMDC has confirmed the 2026 syllabus is unchanged from the 2025 revision, so everything on this page is still examinable.
How many Reaction Kinetics questions come up in the MDCAT?
PMDC does not publish a per-chapter breakdown, so nobody can tell you a reliable number - be careful with pages that do. What can be counted is the paper as a whole: Chemistry is 45 of the 180 questions, and 8% of the Chemistry questions in our archive so far have come from Reaction Kinetics.
Do these Reaction Kinetics MCQs come with explanations?
Yes, and they are written from scratch rather than copied. An answer letter tells you nothing about why the other three options are wrong, which is the part that transfers to the next question. The first 0 questions of every paper are free to read in full; the rest need a pass.