MDCAT — Chemistry MCQs
Practice 705 Chemistry past-paper MCQs for MDCAT, each with a detailed explanation and reference. Try free samples below, then start a full quiz.
Part of the full MDCAT QBank — 2,811 questions across all subjects.
Chemistry is 25% of the MDCAT paper, and rewards understanding mechanisms over memorising facts — organic chemistry alone accounts for a large share of the marks.
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High-Yield Chemistry Topics
Organic reactions
addition, substitution and elimination mechanisms, functional groups and IUPAC nomenclature
Physical chemistry
thermodynamics, chemical equilibrium and electrochemistry — calculation-heavy, so practice daily
Periodic trends
ionisation energy, atomic radius and electronegativity patterns across the table
Stoichiometry & solutions
mole concept, limiting reagent and molarity vs molality
Sample Chemistry Questions
In mass spectrometer, detector or collector measures the:
- A.Masses of isotopes
- B.Percentages of isotopes
- C.Relative abundances of isotopes
- D.Mass numbers of isotopes
How many 'Cl' (chlorine) atoms are in two moles of chlorine?
- A.2 × 6.02 × 10⁻²³ atoms
- B.35.5 × 6.02 × 10²³ atoms
- C.2 × 10²³ atoms
- D.2 × 6.02 × 10²³ atoms
An organic compound has empirical formula C₃H₃O, if molar mass of compound is 110.15 g mol⁻¹. The molecular formula of this organic compound is (A, of C=12, H=1.008 and O=16)
- A.C₆H₆O₂
- B.C₃H₃O
- C.C₉H₉O₃
- D.C₆H₆O₃
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