Career upgrade: Learn practical AI skills for better jobs and higher pay.
Level up
All Practice Exams

100+ Free Advanced Higher Chemistry Practice Questions

Pass your Scottish Advanced Higher Chemistry (C813 77) exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free
1 / 100
Question 1
Score: 0/0

Which combination is most useful for confirming the structure of an unknown organic compound?

A
B
C
D
to track
2026 Statistics

Key Facts: Advanced Higher Chemistry Exam

A-D

Pass grades on Advanced Higher

Qualifications Scotland

100 + 30

Marks (paper + project)

AH Chemistry course specification C813 77

2h 30

Question paper duration

Qualifications Scotland

100

Free practice questions here

OpenExamPrep

Qualifications Scotland Advanced Higher Chemistry (C813 77) is graded A-D and assessed by a 2h 30 question paper (100 marks) plus a 30-mark project. The 2026 specification covers quantum theory, transition metals, thermodynamics, kinetics, organic mechanisms, instrumental analysis (MS/IR/NMR), and laboratory research skills.

Sample Advanced Higher Chemistry Practice Questions

Try these sample questions to test your Advanced Higher Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which observation could the Bohr model of the atom not explain, requiring the development of quantum mechanics?
A.Fine structure (splitting) of spectral lines and spectra of atoms with more than one electron
B.Discrete emission lines in the hydrogen spectrum
C.Quantisation of electron energy in hydrogen
D.The Rydberg formula for hydrogen wavelengths
Explanation: Bohr correctly predicted hydrogen's main emission lines and quantised energy levels, but it could not explain the fine structure observed under high resolution, nor the spectra of multi-electron atoms. Wave mechanics (Schrödinger) was needed to account for these effects.
2The four quantum numbers n, l, ml and ms describe an electron in an atom. Which quantum number determines the shape of an orbital?
A.l
B.n
C.ml
D.ms
Explanation: The azimuthal (angular momentum) quantum number l determines the orbital shape: l = 0 is s (spherical), l = 1 is p (dumb-bell), l = 2 is d (cloverleaf), l = 3 is f. n sets size/energy, ml the orientation, and ms the spin.
3How many orbitals are present in the d subshell of any atom?
A.5
B.3
C.7
D.1
Explanation: For the d subshell l = 2, so ml takes values -2, -1, 0, +1, +2 — five orbitals. Each holds two electrons, giving a maximum of 10 d electrons per shell.
4According to Hund's rule, electrons in a 2p subshell occupy orbitals so that:
A.they singly occupy each orbital with parallel spins before pairing
B.they pair up in the lowest-energy orbital first
C.they pair up with opposite spins in the first orbital
D.two electrons enter the same orbital before the others are filled
Explanation: Hund's rule of maximum multiplicity says degenerate orbitals are filled singly with parallel spins before any pairing, minimising electron-electron repulsion. Only after each is half-filled do electrons pair up with opposite spins (Pauli).
5Which electron configuration represents a chromium atom (Z = 24) in its ground state?
A.[Ar] 3d5 4s1
B.[Ar] 3d4 4s2
C.[Ar] 3d6 4s0
D.[Ar] 4s2 4p4
Explanation: Chromium is an Aufbau exception: a half-filled 3d subshell (3d5) plus a half-filled 4s (4s1) is more stable than 3d4 4s2 because of exchange-energy stabilisation of half-filled subshells.
6Which electron configuration is correct for a copper atom (Z = 29) in its ground state?
A.[Ar] 3d10 4s1
B.[Ar] 3d9 4s2
C.[Ar] 3d10 4s2
D.[Ar] 3d8 4s2 4p1
Explanation: Copper is an Aufbau exception. A fully filled 3d10 subshell combined with 4s1 is more stable than 3d9 4s2 due to exchange-energy stabilisation of the filled d subshell.
7Which of the following sets of quantum numbers (n, l, ml, ms) is NOT allowed?
A.(2, 2, 0, +1/2)
B.(3, 2, -2, -1/2)
C.(4, 0, 0, +1/2)
D.(2, 1, -1, -1/2)
Explanation: For a given n, l can take values 0 to (n-1). With n = 2, l can only be 0 or 1, so l = 2 is forbidden. The other three combinations satisfy the n, l, ml rules.
8Which list correctly shows atomic radius DECREASING across Period 3 (Na to Cl)?
A.Na > Mg > Al > Si > P > S > Cl
B.Cl > S > P > Si > Al > Mg > Na
C.Mg > Na > Si > Al > S > P > Cl
D.Na > Cl > Mg > S > Al > P > Si
Explanation: Across a period, nuclear charge increases while electrons enter the same principal shell with similar shielding. The increasing effective nuclear charge pulls electrons closer, so atomic radius decreases from Na to Cl.
9There is a large jump between the third and fourth successive ionisation energies of an element. To which group does it most likely belong?
A.Group 13 (boron group)
B.Group 2 (alkaline earth)
C.Group 14 (carbon group)
D.Group 15 (pnictogens)
Explanation: Successive ionisations jump sharply when the next electron must come from an inner shell. A jump after the third electron indicates three valence electrons — characteristic of Group 13 (e.g. Al: 2,8,3).
10On the Pauling scale, which atom has the highest electronegativity?
A.Fluorine
B.Oxygen
C.Chlorine
D.Nitrogen
Explanation: Pauling assigned fluorine the highest electronegativity (~4.0), reflecting its strong attraction for bonding electrons. Oxygen is ~3.5, chlorine ~3.0, nitrogen ~3.0.

About the Advanced Higher Chemistry Exam

Advanced Higher Chemistry (course code C813 77) is delivered by Qualifications Scotland at SCQF Level 7. Three units — Inorganic and Physical Chemistry, Organic Chemistry and Instrumental Analysis, and Researching Chemistry — are assessed by a 100-mark question paper and an externally marked 30-mark project.

Questions

100 scored questions

Time Limit

Question paper 2 hours 30 minutes; Project completed under supervision

Passing Score

Grade A is the highest, A-D count as a pass (A-B-C-D), No Award is a fail

Exam Fee

Funded by Scottish Government for school candidates; private candidate entry fee approx GBP 49.10 per subject (Qualifications Scotland (formerly SQA))

Advanced Higher Chemistry Exam Content Outline

~12%

Electronic Structure and Quantum Theory

Wave-particle duality, quantum numbers n/l/ml/ms, s/p/d/f orbital shapes, Aufbau/Pauli/Hund's rules, configurations including Cr and Cu exceptions

~10%

Periodic Trends

Trends in atomic and ionic radii, successive ionisation energies, Pauling electronegativity across periods and down groups

~13%

Transition Metals and Crystal Field Theory

Variable oxidation states, coloured d-d transitions, monodentate and polydentate ligands, isomerism in complexes, octahedral/tetrahedral splitting, high/low spin

~12%

Thermodynamics and Equilibrium

Born-Haber cycles, lattice and hydration enthalpies, entropy from S° values, free energy and spontaneity, Kp and Kc

~10%

Reaction Kinetics

Rate equations, order of reaction, overall order, first-order half-life t1/2 = ln 2 / k, Arrhenius equation and Ea by graph

~12%

Organic Structure and Stereochemistry

Sigma and pi bonds, sp/sp2/sp3 hybridisation, E/Z geometric isomerism, optical isomerism, chirality, R/S nomenclature, racemic mixtures, polarimetry

~13%

Organic Reaction Mechanisms

Electrophilic addition (Markovnikov), electrophilic aromatic substitution (nitration, Friedel-Crafts), SN1 vs SN2, nucleophilic addition (Grignard, NaBH4), aldehyde/ketone tests

~10%

Instrumental Analysis

Mass spectrometry (M+, M+1, fragments), IR diagnostic regions (OH, C=O, NH, CN), 1H and 13C NMR, chromatography (TLC, GC, HPLC, column)

~18%

Researching Chemistry

Volumetric technique, titration calculations, recrystallisation, distillation, melting point, uncertainty propagation, Beer-Lambert, risk assessment and project design

How to Pass the Advanced Higher Chemistry Exam

What You Need to Know

  • Passing score: Grade A is the highest, A-D count as a pass (A-B-C-D), No Award is a fail
  • Exam length: 100 questions
  • Time limit: Question paper 2 hours 30 minutes; Project completed under supervision
  • Exam fee: Funded by Scottish Government for school candidates; private candidate entry fee approx GBP 49.10 per subject

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Advanced Higher Chemistry Study Tips from Top Performers

1Drill rate equation algebra and order-of-reaction graph identification — these recur every paper
2Memorise IR diagnostic bands (OH 3200-3550 broad, C=O ~1700, NH 3300-3500, CN ~2200) and NMR chemical shifts
3Practise the Born-Haber cycle layout until you can construct it from memory for an alkali halide
4Use past papers from the Qualifications Scotland archive and study the marking instructions for the project rubric

Frequently Asked Questions

Who awards Advanced Higher Chemistry?

Advanced Higher Chemistry is awarded by Qualifications Scotland, the awarding body formed from the Scottish Qualifications Authority (SQA) on 1 February 2026. The course code is C813 77 and it sits at SCQF Level 7.

How is Advanced Higher Chemistry assessed?

Assessment is a 100-mark question paper of 2 hours 30 minutes plus a 30-mark externally marked project. Combined marks out of 130 determine the final grade.

What grades are awarded for Advanced Higher Chemistry?

Grades A, B, C, D and No Award are issued. Grades A through D count as a pass; the project mark contributes alongside the written paper to the overall grade.

How does Advanced Higher Chemistry compare to A-Level Chemistry?

Advanced Higher Chemistry is widely regarded as comparable to or slightly more demanding than A-Level Chemistry, with a strong focus on quantum theory, transition metals, instrumental analysis (NMR/MS/IR) and a substantial independent research project.