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Key Facts: Državna Matura Chemistry Exam

180 Min

Total exam duration in a single session

NCVVO Ispitni katalog KEM-2026

70 Points

Total scoreable examination points

NCVVO Ispitni katalog KEM-2026

17.50 / 70

Minimum pass threshold (25%, ocjena 2)

Pravilnik o polaganju državne mature (NN 56/2026)

45%

Tvari (Substances) domain weight

NCVVO Ispitni katalog KEM-2026

40%

Promjene i procesi domain weight

NCVVO Ispitni katalog KEM-2026

15%

Energija domain weight

NCVVO Ispitni katalog KEM-2026

Free

Summer session cost for regular seniors

NCVVO / MZO Croatia

Periodic Table

Standardized periodic table sheet provided

NCVVO Examination Guidelines

Calculator

Approved non-programmable scientific calculator permitted

NCVVO Examination Guidelines

The Croatian Državna matura Chemistry is an elective 180-minute, 70-point national exam testing substances (45%), processes (40%), and thermochemical energy (15%); scoring 17.50/70 points (25%) is required to pass.

Sample Državna Matura Chemistry Practice Questions

Try these sample questions to review concepts for the Državna Matura Chemistry exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following sets of quantum numbers (n, l, ml, ms) represents an allowed ground-state electron in a 4p orbital of a bromine atom?
A.(4, 2, 0, -1/2)
B.(4, 0, +1, +1/2)
C.(3, 1, -1, -1/2)
D.(4, 1, -1, +1/2)
Explanation: For a 4p orbital, the principal quantum number is n = 4 and the angular momentum quantum number is l = 1. The magnetic quantum number ml can take integer values from -l to +l (ml = -1, 0, +1), and the spin quantum number ms can be +1/2 or -1/2. Thus, (4, 1, -1, +1/2) is completely valid.
2What is the correct ground-state electronic configuration of a neutral chromium atom (Cr, Z = 24)?
A.[Ar] 3d⁴ 4s²
B.[Ar] 3d⁶ 4s⁰
C.[Ar] 3d³ 4s² 4p¹
D.[Ar] 3d⁵ 4s¹
Explanation: Chromium is a classic exception to the standard Aufbau filling order. Promotion of one 4s electron into the 3d subshell results in a half-filled, spherically symmetric 3d⁵ 4s¹ configuration, which minimizes electron-electron repulsion and maximizes exchange energy.
3Which of the following elements has the highest first ionization energy (Ei,1)?
A.Oxygen (O)
B.Carbon (C)
C.Nitrogen (N)
D.Boron (B)
Explanation: Across Period 2, first ionization energy generally increases due to increasing effective nuclear charge. However, nitrogen ([He] 2s² 2p³) has a higher first ionization energy (1402 kJ/mol) than oxygen ([He] 2s² 2p⁴, 1314 kJ/mol) because nitrogen possesses an exceptionally stable half-filled 2p subshell, whereas removing an electron from oxygen relieves paired-electron repulsion in the 2px orbital.
4Which of the following diatomic molecules has the most polar covalent bond?
A.Hydrogen chloride (HCl)
B.Hydrogen bromide (HBr)
C.Hydrogen iodide (HI)
D.Hydrogen fluoride (HF)
Explanation: Bond polarity is determined by the difference in electronegativity (Δχ) between the bonded atoms. On the Pauling scale, fluorine has the highest electronegativity (χ = 3.98), giving HF the largest electronegativity difference (Δχ = 3.98 - 2.20 = 1.78) and the highest bond dipole.
5Which of the following substances forms a giant ionic crystal lattice with a coordination number of 6:6 at standard ambient conditions?
A.Cesium chloride (CsCl)
B.Zinc sulfide (ZnS, wurtzite)
C.Sodium chloride (NaCl)
D.Silicon dioxide (SiO₂)
Explanation: Sodium chloride (NaCl) crystallizes in a face-centered cubic lattice where each Na⁺ cation is octahedrally surrounded by 6 Cl⁻ anions, and each Cl⁻ anion is surrounded by 6 Na⁺ cations, giving a coordination ratio of 6:6.
6Which pure substance exhibits intermolecular hydrogen bonding in the liquid state?
A.Dimethyl ether (CH₃OCH₃)
B.Fluoroethane (CH₃CH₂F)
C.Ethanol (CH₃CH₂OH)
D.Ethanal (CH₃CHO)
Explanation: Hydrogen bonding requires a hydrogen atom covalently bonded to a highly electronegative small atom (N, O, or F) with a lone pair. In ethanol, the hydrogen atom is bonded to oxygen (-OH group), enabling extensive intermolecular hydrogen bonding. In dimethyl ether, fluoroethane, and ethanal, hydrogens are bonded only to carbon.
7What is the mass fraction (w) of sodium sulfate in a solution prepared by dissolving 25.0 g of Na₂SO₄ in 225.0 g of distilled water?
A.0.111 (11.1%)
B.0.090 (9.0%)
C.0.100 (10.0%)
D.0.125 (12.5%)
Explanation: Mass fraction w is defined as w = m(solute) / m(solution). Here, m(solution) = m(Na₂SO₄) + m(H₂O) = 25.0 g + 225.0 g = 250.0 g. Therefore, w = 25.0 g / 250.0 g = 0.100, which equals 10.0%.
8What is the systematic IUPAC name for the oxoacid with the chemical formula H₃PO₃?
A.Phosphoric acid
B.Phosphonic acid (phosphorous acid)
C.Hypophosphorous acid
D.Perphosphoric acid
Explanation: H₃PO₃ has phosphorus in the +3 oxidation state. According to IUPAC nomenclature, it is systematically named phosphonic acid (traditionally phosphorous acid), having one P-H bond, two P-OH groups, and one P=O double bond, making it diprotic.
9According to VSEPR theory, what is the molecular geometry and electron-pair arrangement of the sulfur tetrafluoride molecule (SF₄)?
A.Tetrahedral molecular geometry from a tetrahedral electron-pair arrangement
B.Square planar molecular geometry from an octahedral electron-pair arrangement
C.Trigonal pyramidal molecular geometry from a tetrahedral electron-pair arrangement
D.Seesaw molecular geometry from a trigonal bipyramidal electron-pair arrangement
Explanation: Sulfur has 6 valence electrons and forms 4 single bonds with fluorine atoms, leaving 1 non-bonding lone pair (total steric number = 4 + 1 = 5). Five electron pairs arrange in a trigonal bipyramid. The lone pair occupies an equatorial position to minimize 90° repulsions, producing a 'seesaw' molecular geometry.
10What are the hybridization states of carbon-3 and carbon-4, respectively, in pent-3-en-1-yne (HC≡C-CH=CH-CH₃)?
A.sp² and sp²
B.sp² and sp
C.sp³ and sp²
D.sp and sp
Explanation: In pent-3-en-1-yne (HC≡C-CH=CH-CH₃), IUPAC numbering gives the lowest locant set to unsaturated bonds starting from the terminal alkyne (C1 and C2 for the triple bond, C3 and C4 for the double bond, and C5 for the methyl group). Each carbon involved in the C3=C4 double bond forms three sigma bonds and one pi bond, requiring sp² hybridization. Both C3 and C4 are therefore sp² hybridized.

About the Državna Matura Chemistry Exam

The Državna matura in Chemistry (Kemija) is the standardized national elective leaving examination administered across the Republic of Croatia by the National Centre for External Evaluation of Education (Nacionalni centar za vanjsko vrednovanje obrazovanja - NCVVO), established pursuant to the Pravilnik o polaganju državne mature (NN 56/2026). As one of the most intellectually demanding elective matura examinations, it serves as a primary selective admissions criterion for leading competitive university faculties including medicine (MEF), pharmacy and medical biochemistry (FBF), chemical engineering and technology (FKIT), food technology and biotechnology (PBF), and natural sciences (PMF). The examination carries 70 scoreable points administered over a single 180-minute morning session. Testing aligns with the official Ispitni katalog KEM across three core blueprint domains: Tvari (Substances, 45%), Promjene i procesi (Changes and Processes, 40%), and Energija (Energy, 15%). Candidates are provided the official NCVVO periodic table of elements with relative atomic masses and are permitted an approved non-programmable scientific calculator without graphic or symbolic algebraic capabilities. Grading operates on a national standard where 25% (17.50 out of 70 points) represents the minimum threshold for a passing grade (ocjena dovoljan 2).

Exam sponsor: NCVVO. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

70 questions

Time Limit

180 minutes

Passing Score

17.50 out of 70 points (25%)

Exam / Certification Fees

Free for regular seniors; fee per exam applies for re-sits/external candidates.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

45%

Tvari (Substances)

Atomic structure, electronic configuration, periodic trends, chemical bonding, intermolecular interactions, states of matter, solutions and solubility, inorganic and organic IUPAC nomenclature, functional groups, and isomerism.

40%

Promjene i procesi (Changes and Processes)

Chemical equations, stoichiometry, limiting reactants, gas laws, chemical kinetics, equilibrium constants (Kc, Kp), Le Chatelier's principle, acid-base equilibria, pH, buffers, titrations, redox balancing, galvanic cells, and electrolysis.

15%

Energija (Energy)

Thermochemistry, exothermic and endothermic reactions, standard enthalpy of formation/combustion, Hess's law, calorimetry, bond energies, entropy, Gibbs free energy spontaneity, and activation energy.

Preparing for the Državna Matura Chemistry Exam

What You Need to Know

  • Passing score: 17.50 out of 70 points (25%)
  • Exam length: 70 questions
  • Time limit: 180 minutes
  • Exam / certification fees: Free for regular seniors; fee per exam applies for re-sits/external candidates. Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Državna Matura Chemistry: Suggested Study Strategy

1Master dimensional analysis and stoichiometric ratios for limiting reagent, gas volume (Vm = 22.4 dm³/mol or 24.8 dm³/mol depending on specified STP/SATP conditions), and percent yield problems.
2Thoroughly practice writing and balancing redox equations using the ion-electron method in both acidic (H⁺/H₂O) and basic (OH⁻/H₂O) solutions.
3Understand the connection between equilibrium constant expressions (Kc, Kp) and Le Chatelier's principle when pressure, temperature, or inert gas concentrations vary.
4Memorize key functional group priority rules in IUPAC organic nomenclature, and practice recognizing structural, geometric (cis/trans or E/Z), and enantiomeric optical isomers.
5Be confident calculating pH and pOH for strong monoprotic/diprotic acids and bases, weak electrolytes using Ka/Kb and ICE tables, and buffer solutions using the Henderson-Hasselbalch equation.
6Practice multi-step thermochemical calculations combining Hess's law, standard enthalpies of formation, calorimetry equations (q = m·c·ΔT), and Gibbs free energy (ΔG = ΔH - TΔS) to determine spontaneity.
7Work through past NCVVO chemistry papers under strict 180-minute timed conditions to pace your work between quick conceptual questions and complex written calculations.

Frequently Asked Questions

What is the format and duration of the Croatian Državna matura Chemistry exam?

The examination lasts 180 uninterrupted minutes and is worth 70 points. It includes closed-ended multiple-choice questions (four choices with exactly one correct response), short-answer constructed response questions requiring numerical values or chemical formulas, and extended multi-step calculation tasks requiring complete stoichiometric and thermodynamic derivations.

What is the minimum passing threshold for Državna matura Chemistry?

The minimum passing score (prag prolaznosti for ocjena dovoljan 2) is 25%, corresponding to 17.50 out of 70 points. Standard benchmark score ranges set by NCVVO are: dobar (3) from 35.00 points (50%), vrlo dobar (4) from 49.00 points (70%), and odličan (5) from 59.50 points (85%), with final cutoffs confirmed annually.

Which university faculties in Croatia require or prioritize the Chemistry matura exam?

The Chemistry matura exam is compulsory or heavily weighted for admission to the School of Medicine (MEF Zagreb, Rijeka, Split, Osijek), Faculty of Pharmacy and Biochemistry (FBF), Faculty of Chemical Engineering and Technology (FKIT), Faculty of Science Department of Chemistry (PMF), Faculty of Food Technology and Biotechnology (PBF), Faculty of Veterinary Medicine, and Dental Medicine.

What materials, tables, and calculators are permitted during the exam?

Candidates are permitted standard writing instruments (blue or black ballpoint pen, pencil, eraser, ruler) and an approved scientific calculator. Calculators must not be programmable, must not have graphing screens, and must not contain computer algebra systems (CAS). An official periodic table sheet with atomic numbers, element symbols, and relative atomic masses is included inside the exam booklet.

How are points distributed across the three blueprint domains?

According to the official Ispitni katalog KEM-2026, the 70 points are distributed as follows: Tvari (Substances) represents 45% (~31-32 points), Promjene i procesi (Changes and Processes) accounts for 40% (~28 points), and Energija (Energy) accounts for 15% (~10-11 points).

Are points deducted for incorrect answers on multiple-choice questions?

No. There is no negative marking on the Croatian Državna matura. An incorrect or omitted answer receives 0 points. Candidates should therefore provide a response for every question.

When are the exam sessions held for Državna matura?

The primary summer examination window (ljetni rok) takes place in June, with official results published in early July on the Postani-student portal. The autumn re-sit window (jesenski rok) takes place in late August and early September.