CHEMISTRY

Chemistry makes up 25% of the MDCAT — 45 out of 180 MCQs — the second-largest share of the exam, and one of the most varied subjects you’ll face. Across 20 chapters, it spans physical chemistry (gases, equilibrium, thermodynamics, kinetics), organic chemistry (hydrocarbons, alcohols, carboxylic acids, and their reaction mechanisms), and inorganic chemistry (atomic structure, periodic trends, bonding) — three genuinely different ways of thinking, all tested in the same paper.

That variety is exactly why Chemistry trips up so many students — a student who’s strong in organic mechanisms can still lose marks on physical chemistry numericals, or vice versa. Confidence in Chemistry means confidence across all three areas, not just the one you naturally prefer.

Our Chemistry question bank covers all 20 chapters in full, cross-checked against real past MDCAT papers so nothing examinable slips through — including the content that sits just beyond a curriculum heading’s literal wording, which is exactly where many students get caught out. Every MCQ comes with a complete explanation for every option, so whether it’s a reaction mechanism or a concept-based question, you understand the reasoning, not just the answer.

At a quarter of your total score, Chemistry is too large a share to leave to chance — this practice set is built to make sure no part of it catches you off guard.