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100+ Free Estonian Basic-School Chemistry Exam Practice Questions

Estonian Basic-School Final Examination — Chemistry (Keemia) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Estonian Basic-School Chemistry Exam Exam

120 minutes / 100 points / ~10 tasks

Single written paper spanning general/inorganic chemistry, organic chemistry, and calculation-problem blocks; the 2023 official paper used 10 numbered tasks worth 6-14 points each

Harno, Põhikooli lõpueksam Keemia 2023 (official exam paper)

50/100 points (50%) to pass

Minimum score for the exam to count as 'sooritatud' (completed) toward the basic-school graduation requirement

Riigi Teataja, Põhikooli ja gümnaasiumi lõpueksamite korraldamise tingimused ja kord

1 of 9 valikeksam subject choices

Keemia is an elective final exam, chosen alongside Bioloogia, Füüsika, Geograafia, Ajalugu, Ühiskonnaõpetus, Vene keel ja kirjandus, Inglise keel (B1) or Vene keel võõrkeelena (B1)

Harno, Põhikooli valikeksam

Grade 8-9 (2-year) curriculum

Chemistry is taught only in Grades 8 and 9 of the three-year III kooliaste, per the national basic-school curriculum's ainevaldkond loodusained

Riigi Teataja, Põhikooli riiklik õppekava (Lisa 4)

6 May 2026

2025/2026 exam date for the Keemia valikeksam, within Harno's general valikeksam window of 6-8 May 2026

Haridus- ja Teadusministeerium, EKSAMITE KALENDER 2026

Sat only once from 2026

New rule: every basic-school final exam is sat a single time regardless of result; routine school-organised retakes were discontinued in favor of a state-set 'lisaeksam' for documented absences

Õpetajate Leht, 'Põhikooli lõpetamine ilma korduseksamita' (January 2026)

Free 100-question MCQ study bank for Estonia's põhikooli keemia valikeksam (Grade 9 elective), covering the Grade 8-9 chemistry curriculum: matter/mixtures/solutions, atomic structure and the periodic table, mole and stoichiometric calculations, oxygen/oxides, acids/bases/salts, metals and reactivity, redox/electrochemistry, organic chemistry basics, and environmental/applied chemistry. Official exam: single 120-minute written paper, 100 points across roughly 10 tasks spanning general/inorganic chemistry, organic chemistry and calculation blocks, scheduled 6 May 2026. Pass threshold is 50/100 points (50%). Periodic table, solubility table, metals' reactivity series and a calculator are used to complete the paper. Chemistry is one of nine valikeksam electives (not compulsory like Matemaatika), alongside a required Estonian-language exam. Starting 2026, every final exam is sat only once - no routine retakes. No fee, since basic education is free. Not an official-format simulation - the real exam requires full written, partial-credit solutions.

Sample Estonian Basic-School Chemistry Exam Practice Questions

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

1What best describes a pure substance, as opposed to a mixture?
A.It has a fixed, definite composition throughout
B.It always contains at least two different elements
C.It cannot be separated by any physical method
D.It always exists as a solid at room temperature
Explanation: A pure substance, whether an element or a compound, has a fixed composition and a consistent set of physical properties such as melting point and density. A mixture, by contrast, has a variable composition that depends on how much of each component was combined.
2Which of the following is a physical property of a substance, rather than a chemical one?
A.Melting point
B.Reacting with acids to release gas
C.Rusting in moist air
D.Burning in oxygen
Explanation: Melting point is a physical property: it can be measured without changing the substance's chemical identity. Reacting with acids, rusting and burning are all chemical changes, since they produce new substances with different compositions.
3A solution such as salt water is best described as a:
A.Heterogeneous mixture with visible particles
B.Homogeneous mixture of solute dissolved in solvent
C.Pure compound
D.Suspension that settles over time
Explanation: A solution is a homogeneous mixture in which the solute (e.g. salt) is completely and evenly dissolved throughout the solvent (e.g. water), so the composition looks the same throughout and no particles settle out.
4How does a suspension differ from a true solution?
A.A suspension contains no water
B.A suspension's particles are large enough to settle out or be filtered, unlike a dissolved solute
C.A suspension always has a lower density than a solution
D.A suspension is always colored while a solution is always colorless
Explanation: In a suspension, the dispersed particles are large enough that they eventually settle under gravity and can be separated by filtration, whereas a true solution's dissolved particles are so small they never settle and pass through filter paper.
5A solution is made by dissolving 10 g of salt in 90 g of water. What is the mass percent of salt in the resulting solution?
A.9%
B.10%
C.11%
D.90%
Explanation: Mass percent = (mass of solute ÷ total mass of solution) × 100%. The total solution mass is 10 g + 90 g = 100 g, so mass percent = (10 ÷ 100) × 100% = 10%.
6Which piece of laboratory equipment is used to separate insoluble solid particles from a liquid by filtration?
A.Filter funnel with filter paper
B.Evaporating dish
C.Graduated cylinder
D.Test tube holder
Explanation: A filter funnel lined with filter paper lets liquid and dissolved substances pass through while trapping insoluble solid particles on the paper, making it the standard tool for filtration.
7To recover a dissolved solid, such as salt, from a solution, which separation technique should be used?
A.Filtration
B.Evaporation of the solvent
C.Magnetic separation
D.Decantation only
Explanation: Because the salt is fully dissolved and forms a homogeneous solution with water, filtration cannot remove it. Evaporating the water leaves the dissolved solid behind as a solid residue.
8How many grams of salt are needed to prepare 250 g of a solution that is 8% salt by mass?
A.8 g
B.20 g
C.25 g
D.230 g
Explanation: Mass of solute = mass percent × total solution mass = 0.08 × 250 g = 20 g of salt. The remaining 230 g (250 g minus 20 g) would be water.
9What determines an element's atomic number?
A.The number of protons in its nucleus
B.The number of neutrons in its nucleus
C.The total mass of the atom
D.The number of electron shells
Explanation: The atomic number is defined as the number of protons in an atom's nucleus. It uniquely identifies the element and determines its position in the periodic table.
10Oxygen has an atomic number of 8. How many protons are found in the nucleus of an oxygen atom?
A.6
B.7
C.8
D.16
Explanation: The atomic number equals the number of protons in the nucleus, so an oxygen atom (atomic number 8) contains exactly 8 protons.

About the Estonian Basic-School Chemistry Exam Practice Questions

Verified exam format metadata for Estonian Basic-School Final Examination — Chemistry (Keemia) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.