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Chemical Equilibrium MCQs for MDCAT

4 Chemical Equilibrium questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.

4 questionsChemistry

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1Chemistryphenol acidity

Phenol is more acidic than alcohols because of the following reason:

  1. A.Delocalization of negative charge in the OH group
  2. B.Delocalization of positive charge on the carbon atom in ring
  3. C.Delicalization of negative charge in the ring
  4. D.Delocalization of positive charge on the OH group

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2Chemistrykp vs kc

Which of the following reaction has greater Kp than Kc (kp>Kc)

  1. A.2NO + Cl2 = 2NOCi
  2. B.2SO2 + O2 = 2SO3
  3. C.2NOCi = 2No + Cl2
  4. D.N2 + 3H2 = 2NH3

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3Chemistrykp and kc relation

For a gaseous phase reaction, when number of moles of reactants and products are equal:

  1. A.The values of Kp and Kc are different
  2. B.The values of Kp is greater than Kc
  3. C.The values of Kc is greater than Kp
  4. D.The values of Kp and KC are the same

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4Chemistrycommon ion effect example

Purification of table salt (NaCl) by passing HCI gas through its saturated aqueous solution is an example of:

  1. A.Lawa of mass action
  2. B.Hess’s law
  3. C.Common ion effect
  4. D.Henry’s law

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How Chemical Equilibrium is examined

Chemical Equilibrium 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 Chemical Equilibrium”. What the archive can tell you is what actually appeared: 4 Chemical Equilibrium 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 Chemical Equilibrium 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 Chemical Equilibrium in the MDCAT 2026 syllabus?
Yes. Chemical Equilibrium 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 Chemical Equilibrium 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 Chemical Equilibrium.
Do these Chemical Equilibrium 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.