Chemistry: Concepts, Numbers, and Predictable Traps
Chemistry contributes roughly a quarter of the MDCAT objective paper and is the section where candidates lose marks not for lack of knowledge but for unpractised numerical technique. The PMC pattern recycles the same families of questions: mole conversions, significant figures, electron configuration, bond polarity, hybridisation, functional-group identification, and oxidation-reduction reasoning.
What the examiner actually tests
- Atomic structure & periodicity: quantum numbers, shells and subshells, electronic configuration, isotopes, and the trends in ionisation energy, electronegativity and atomic/ionic radius.
- Chemical bonding: ionic versus covalent character, Lewis structures, VSEPR shapes, hybridisation, hydrogen bonding, and dipole moments.
- Stoichiometry & physical chemistry: the mole concept, Avogadro’s number, limiting reagent, empirical and molecular formulae, gas laws, solutions and concentration units, equilibrium (Kc, Kp, Le Chatelier), rate laws, and thermodynamic signs.
- Electrochemistry & redox: oxidation numbers, balancing redox reactions, galvanic and electrolytic cells, standard electrode potentials, and Faraday’s laws.
- Organic chemistry: IUPAC naming, homologous series, isomerism, functional-group tests, reaction mechanisms (substitution, addition, elimination), polymers, and biomolecule chemistry.
- Inorganic chemistry: s-, p- and d-block behaviour, coordination compounds, oxidation states of transition metals, and industrial chemistry (Haber, Contact, Ostwald processes).
How to use these sets
Numerical items are grouped with their worked rationale, so read the explanation even after choosing correctly — the same arithmetic appears next year with different digits. For theory items, pay attention to the “why the other options are wrong” line; MDCAT chemistry distractors are almost always a neighbouring definition rather than a random statement.
High-frequency recall list
- Avogadro number, molar volume at STP (22.4 dm³), and the mass of one electron.
- pH scale relationships: pH + pOH = 14, and [H⁺] for strong acids/bases.
- Shapes and bond angles: linear 180°, trigonal planar 120°, tetrahedral 109.5°, pyramidal 107°, bent 104.5°.
- Tests: bromine water for unsaturation, Tollens’ and Fehling’s for aldehydes, soda-lime for amines.
📚 Topics in Chemistry (MDCAT & FSc)
Atomic Structure & Periodicity — Part 1
40 practice questions
Practice →Atomic Structure & Periodicity — Part 2
40 practice questions
Practice →Atomic Structure & Periodicity — Part 3
35 practice questions
Practice →Chemical Bonding & Structure — Part 1
40 practice questions
Practice →Chemical Bonding & Structure — Part 2
15 practice questions
Practice →Chemistry — Mixed Practice — Part 1
40 practice questions
Practice →Chemistry — Mixed Practice — Part 2
40 practice questions
Practice →Chemistry — Mixed Practice — Part 3
40 practice questions
Practice →Chemistry — Mixed Practice — Part 4
40 practice questions
Practice →Chemistry — Mixed Practice — Part 5
40 practice questions
Practice →Chemistry — Mixed Practice — Part 6
6 practice questions
Practice →Electrochemistry & Redox
35 practice questions
Practice →Inorganic Chemistry & Acids-Bases — Part 1
40 practice questions
Practice →Inorganic Chemistry & Acids-Bases — Part 2
21 practice questions
Practice →Organic Chemistry — Part 1
40 practice questions
Practice →Organic Chemistry — Part 2
34 practice questions
Practice →Physical Chemistry & Stoichiometry — Part 1
40 practice questions
Practice →Physical Chemistry & Stoichiometry — Part 2
40 practice questions
Practice →Physical Chemistry & Stoichiometry — Part 3
35 practice questions
Practice →🎯 Available MCQ Sets
Atomic Structure & Periodicity — Part 1: 40 MCQs with Explanations
Atomic Structure & Periodicity — Part 1
40 basic atomic structure & periodicity MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Atomic Structure & Periodicity — Part 2: 40 MCQs with Explanations
Atomic Structure & Periodicity — Part 2
40 basic atomic structure & periodicity MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Atomic Structure & Periodicity — Part 3: 35 MCQs with Explanations
Atomic Structure & Periodicity — Part 3
35 intermediate atomic structure & periodicity MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemical Bonding & Structure — Part 1: 40 MCQs with Explanations
Chemical Bonding & Structure — Part 1
40 basic chemical bonding & structure MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemical Bonding & Structure — Part 2: 15 MCQs with Explanations
Chemical Bonding & Structure — Part 2
15 intermediate chemical bonding & structure MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 1: 40 MCQs with Explanations
Chemistry — Mixed Practice — Part 1
40 basic chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 2: 40 MCQs with Explanations
Chemistry — Mixed Practice — Part 2
40 intermediate chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 3: 40 MCQs with Explanations
Chemistry — Mixed Practice — Part 3
40 intermediate chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 4: 40 MCQs with Explanations
Chemistry — Mixed Practice — Part 4
40 intermediate chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 5: 40 MCQs with Explanations
Chemistry — Mixed Practice — Part 5
40 intermediate chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Chemistry — Mixed Practice — Part 6: 6 MCQs with Explanations
Chemistry — Mixed Practice — Part 6
6 intermediate chemistry — mixed practice MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Electrochemistry & Redox: 35 MCQs with Explanations
Electrochemistry & Redox
35 intermediate electrochemistry & redox MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Inorganic Chemistry & Acids-Bases — Part 1: 40 MCQs with Explanations
Inorganic Chemistry & Acids-Bases — Part 1
40 basic inorganic chemistry & acids-bases MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Inorganic Chemistry & Acids-Bases — Part 2: 21 MCQs with Explanations
Inorganic Chemistry & Acids-Bases — Part 2
21 intermediate inorganic chemistry & acids-bases MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Organic Chemistry — Part 1: 40 MCQs with Explanations
Organic Chemistry — Part 1
40 basic organic chemistry MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Organic Chemistry — Part 2: 34 MCQs with Explanations
Organic Chemistry — Part 2
34 intermediate organic chemistry MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Physical Chemistry & Stoichiometry — Part 1: 40 MCQs with Explanations
Physical Chemistry & Stoichiometry — Part 1
40 intermediate physical chemistry & stoichiometry MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Physical Chemistry & Stoichiometry — Part 2: 40 MCQs with Explanations
Physical Chemistry & Stoichiometry — Part 2
40 basic physical chemistry & stoichiometry MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Physical Chemistry & Stoichiometry — Part 3: 35 MCQs with Explanations
Physical Chemistry & Stoichiometry — Part 3
35 intermediate physical chemistry & stoichiometry MCQs with answers and explanations for MDCAT, FSc, PPSC preparation.
Ready to Practice?
Test your knowledge of Chemistry (MDCAT & FSc) with our comprehensive MCQ sets.
Browse More MCQs