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🇵🇰 ECAT · subject
ECAT Chemistry Syllabus
Every chapter and topic of Chemistry examined in ECAT — 12 chapters, 38 topics, plus 50 flashcards written against it.
Chemistry syllabus — full chapter and topic list
Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Chemistry in ECAT, not a summary of it.
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Fundamental Concepts and Stoichiometry
3 topics- Mole concept and Avogadro's number
- Stoichiometric calculations
- Limiting reactant and yield
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Atomic Structure
3 topics- Bohr's model and quantum numbers
- Electronic configuration
- Atomic spectra and orbitals
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States of Matter
3 topics- Gases and gas laws
- Liquids and intermolecular forces
- Solids and crystal structures
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Chemical Bonding
3 topics- Ionic and covalent bonding
- Hybridization and molecular geometry
- Bond energy and polarity
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Thermochemistry and Energetics
3 topics- Enthalpy and heat of reaction
- Hess's law
- Born-Haber cycle
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Chemical Equilibrium
3 topics- Law of mass action
- Le Chatelier's principle
- Equilibrium constant applications
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Acids, Bases and Solutions
4 topics- pH and ionic product of water
- Buffer solutions
- Solubility product
- Colligative properties
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Chemical Kinetics
3 topics- Rate of reaction and order
- Factors affecting reaction rate
- Catalysis
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Electrochemistry
3 topics- Oxidation-reduction reactions
- Electrolysis and Faraday's laws
- Galvanic cells and electrode potential
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Periodic Table and Inorganic Chemistry
3 topics- Periodicity of properties
- s and p block elements
- Transition elements
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Fundamental Principles of Organic Chemistry
3 topics- Classification and nomenclature
- Isomerism
- Reaction mechanisms
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Organic Compounds and Applied Chemistry
4 topics- Hydrocarbons
- Alcohols, phenols and ethers
- Carbonyl compounds and carboxylic acids
- Macromolecules and polymers
Chemistry flashcards for ECAT
21 of 50 cards from the Chemistry deck — real questions with worked answers.
Define a mole and state how many particles it contains.
A mole is the amount of substance containing as many elementary particles as there are atoms in 12 g of carbon-12, equal to Avogadro's number, 6.022 x 10^23 particles.
What is the value and symbol of Avogadro's number?
NA = 6.022 x 10^23 particles per mole.
How do you calculate the number of moles from a given mass?
Number of moles = mass (g) / molar mass (g/mol).
How do you find the number of particles given the number of moles?
Number of particles = number of moles x 6.022 x 10^23.
What volume does 1 mole of any ideal gas occupy at STP?
22.4 dm^3 (22.4 liters) at STP (0 C, 1 atm).
Define molar mass and give its units.
Molar mass is the mass of one mole of a substance, numerically equal to its atomic/molecular mass, with units g/mol.
What is a limiting reactant?
The reactant that is completely consumed first in a reaction, thereby limiting the amount of product formed.
How is percentage yield calculated?
Percentage yield = (actual yield / theoretical yield) x 100.
Distinguish between theoretical yield and actual yield.
Theoretical yield is the maximum product calculated from stoichiometry; actual yield is the amount actually obtained experimentally, usually less.
What are the steps to identify the limiting reactant in a reaction?
Convert each reactant mass to moles, divide each by its stoichiometric coefficient, and the reactant with the smallest ratio is the limiting reactant.
In stoichiometry, what does a balanced equation's coefficients represent?
The mole ratio (and for gases, volume ratio) in which reactants combine and products form.
State the formula relating moles, molarity, and volume of a solution.
Moles = molarity (mol/dm^3) x volume (dm^3).
What is the main postulate of Bohr's model regarding electron orbits?
Electrons revolve in fixed circular orbits of definite energy without radiating energy; energy is emitted or absorbed only when an electron jumps between orbits.
What is the condition for angular momentum in Bohr's model?
Angular momentum is quantized: mvr = nh/2pi, where n is a positive integer.
What does the principal quantum number (n) determine?
It determines the main energy level/shell and the size and energy of the orbital; n = 1, 2, 3...
What does the azimuthal (angular momentum) quantum number (l) describe, and what values can it take?
It describes the subshell/shape of the orbital and takes values from 0 to (n-1), corresponding to s, p, d, f.
What does the magnetic quantum number (m) specify, and its range of values?
It specifies the orientation of the orbital in space and ranges from -l to +l, including 0.
What are the two possible values of the spin quantum number (s)?
+1/2 and -1/2, representing the two spin orientations of an electron.
State the Pauli Exclusion Principle.
No two electrons in an atom can have the same set of all four quantum numbers; an orbital holds a maximum of two electrons with opposite spins.
State Hund's rule of maximum multiplicity.
Electrons fill degenerate orbitals singly with parallel spins before pairing up.
State the Aufbau principle.
Electrons fill orbitals in order of increasing energy, lowest energy orbitals first.
Planning Chemistry for ECAT
Chemistry is about 25% of the ECAT syllabus by topic count — 38 of 154 topics, spread over 12 chapters. At roughly 45 minutes per topic plus 12 minutes per sub-topic, a first pass runs to about 30 hours.
The heaviest chapters are Acids, Bases and Solutions (4 topics), Organic Compounds and Applied Chemistry (4 topics), Fundamental Concepts and Stoichiometry (3 topics) . Front-load those while your energy is high; the short chapters are better revision filler later.
Work top-down: read the chapter, then tick topics off individually rather than marking the whole chapter done. Sub-topics are where silent gaps hide.
Chemistry (ECAT) FAQ
What is in the ECAT Chemistry syllabus?
Chemistry is split into 12 chapters — Fundamental Concepts and Stoichiometry, Atomic Structure, States of Matter, Chemical Bonding, Thermochemistry and Energetics and Chemical Equilibrium, and 6 more, containing 38 topics and 0 sub-topics in total.
How is Chemistry structured in the ECAT syllabus?
12 chapters. Chemistry accounts for about 25% of the topics in the whole ECAT syllabus (38 of 154).
How long should I spend on Chemistry for ECAT?
Budget around 30 hours for a first pass through Chemistry — about 45 minutes per topic plus 12 minutes per sub-topic across its 38 topics. Add revision cycles on top.
Are there flashcards for ECAT Chemistry?
Yes — a 50-card Chemistry deck. Sample cards are printed on this page, and the full deck is free in the Examius app with spaced repetition scheduling.