PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free SINF6 Chemistry Practice Questions

Prepare for the Solomon Islands National Form Six Examination — Chemistry exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
53.8% national pass rate for the 2025 Year 12 cohort Pass Rate
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Solomon Islands National Form Six Examination (SINF6)

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Solomon Islands National Form Six Examination — Accounting

Practice Questions

Solomon Islands National Form Six Examination — Agriculture

Practice Questions

Solomon Islands National Form Six Examination — Biology

Practice Questions

Solomon Islands National Form Six Examination — Computer Studies

Practice Questions

Solomon Islands National Form Six Examination — Development Studies

Practice Questions

Solomon Islands National Form Six Examination — Economics

Practice Questions
2026 Statistics

Key Facts: SINF6 Chemistry Exam

30 October 2026

2026 Chemistry paper date

MEHRD 2026 National Examination Timetable

3 hours

Paper duration plus 10 minutes reading time

MEHRD 2026 National Examination Timetable

No fee

National examination fees are prohibited for Year 12

MEHRD administrative instruction on school fees

53.8%

Year 12 national pass rate, 2025 cohort

MEHRD 2025 National Examination Results

265–500

Year 12 aggregate score range reported by MEHRD

MEHRD 2023 National Examination Results

100

Free practice questions in this bank

OpenExamPrep question bank

SINF6 Chemistry is a three-hour national written paper sat by Form 6 students across Solomon Islands, scheduled for Friday 30 October 2026. There is no examination fee, and MEHRD publishes no fixed pass mark: subject results feed a Year 12 aggregate reported on a 265–500 range. This free bank supplies 100 worked multiple-choice questions across the seven syllabus strands, including a Pacific-focused applied chemistry section on ocean acidification and desalination.

Sample SINF6 Chemistry Practice Questions

Try these sample questions to test your SINF6 Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many protons, neutrons, and electrons are present in a neutral atom of the chlorine-37 isotope (atomic number 17)?
A.17 protons, 20 neutrons, 17 electrons
B.17 protons, 17 neutrons, 20 electrons
C.20 protons, 17 neutrons, 20 electrons
D.17 protons, 37 neutrons, 17 electrons
Explanation: The atomic number Z = 17 defines the number of protons (17). In a neutral atom, electrons equal protons (17). Mass number A = 37 equals protons plus neutrons, so neutrons = 37 - 17 = 20.
2Naturally occurring chlorine consists of 75.8% chlorine-35 (atomic mass 34.97 u) and 24.2% chlorine-37 (atomic mass 36.97 u). What is the calculated relative atomic mass of chlorine?
A.35.45
B.35.00
C.36.00
D.35.97
Explanation: Relative atomic mass Ar = (34.97 * 0.758) + (36.97 * 0.242) = 26.507 + 8.947 = 35.45.
3What is the ground-state electron configuration of the iron(III) ion, Fe3+ (atomic number Z = 26)?
A.[Ar] 3d5
B.[Ar] 4s2 3d3
C.[Ar] 4s1 3d4
D.[Ar] 3d6
Explanation: Neutral Fe is [Ar] 4s2 3d6. Ionization removes the two 4s electrons first, then one 3d electron, leaving [Ar] 3d5.
4Which statement best explains why aluminum (Z = 13) has a lower first ionization energy than magnesium (Z = 12)?
A.The outermost electron in aluminum is in a 3p subshell, which is higher in energy and shielded by the 3s subshell.
B.Aluminum has a smaller nuclear charge than magnesium, so it holds its electrons less tightly.
C.The 3s subshell of aluminum experiences greater electron-electron repulsion than that of magnesium.
D.Aluminum forms a stable noble gas configuration upon losing two electrons.
Explanation: Mg is [Ar] 3s2, while Al is [Ar] 3s2 3p1. The single 3p electron in Al is higher in energy and partially shielded by the filled 3s orbital, requiring less energy to remove.
5Which list arranges the single covalent bonds in order of INCREASING bond polarity (least polar to most polar)?
A.C-H < N-H < O-H < F-H
B.F-H < O-H < N-H < C-H
C.N-H < C-H < F-H < O-H
D.C-H < O-H < N-H < F-H
Explanation: Polarity increases with electronegativity difference. Electronegativity values are H=2.1, C=2.5, N=3.0, O=3.5, F=4.0. ΔEN: C-H (0.4) < N-H (0.9) < O-H (1.4) < F-H (1.9).
6According to VSEPR theory, what is the molecular geometry and electron domain arrangement of sulfur tetrafluoride, SF4?
A.See-saw geometry based on a trigonal bipyramidal domain arrangement
B.Square planar geometry based on an octahedral domain arrangement
C.Tetrahedral geometry based on a tetrahedral domain arrangement
D.Trigonal pyramidal geometry based on a trigonal bipyramidal domain arrangement
Explanation: Sulfur has 6 valence electrons. In SF4, it forms 4 single bonds and retains 1 lone pair (5 total electron domains = trigonal bipyramidal). The lone pair occupies an equatorial position to minimize repulsion, yielding a see-saw shape.
7Why is xenon tetrafluoride (XeF4) classified as a non-polar molecule despite containing polar Xe-F bonds?
A.It has a square planar shape where the four Xe-F bond dipoles cancel symmetrically.
B.The electronegativity difference between Xe and F is zero.
C.It has a tetrahedral geometry that distributes charge unevenly across the molecule.
D.The two lone pairs lie on the same side of the molecule, balancing the dipole moment.
Explanation: XeF4 has 6 electron domains (4 bonding pairs, 2 lone pairs) resulting in an octahedral domain geometry. The 2 lone pairs lie opposite each other at 180°, creating a square planar molecular shape where bond dipoles cancel out.
8What hybridization state and H-C-C bond angle are present in ethyne (HC≡CH)?
A.sp hybridization with a 180° bond angle
B.sp2 hybridization with a 120° bond angle
C.sp3 hybridization with a 109.5° bond angle
D.sp3d hybridization with a 90° bond angle
Explanation: Each carbon in ethyne forms 2 sigma bonds (one C-H and one C-C) and 2 pi bonds. This requires sp hybridization, yielding a linear molecular shape with a 180° bond angle.
9Magnesium oxide (MgO) has a significantly higher lattice energy than sodium chloride (NaCl). What are the primary reasons for this difference?
A.Mg2+ and O2- have higher ionic charges and smaller ionic radii than Na+ and Cl-.
B.Magnesium forms covalent network structures whereas sodium forms simple ionic lattices.
C.O2- has a much lower charge density than Cl-, increasing Coulombic attraction.
D.NaCl has a greater molar mass, which weakens electrostatic attraction between ions.
Explanation: Lattice energy is proportional to (q1 * q2) / r. MgO features +2 and -2 charges (product = 4) compared to +1 and -1 in NaCl (product = 1), and Mg2+ and O2- have smaller ionic radii, dramatically increasing electrostatic attraction.
10Water (H2O) has a substantially higher boiling point than hydrogen sulfide (H2S) despite having a smaller molar mass. Which intermolecular force explains this anomaly?
A.Extensive hydrogen bonding between H2O molecules
B.Stronger London dispersion forces in H2O due to higher molecular symmetry
C.Permanent dipole-induced dipole interactions present only in H2O
D.Covalent bonding holding adjacent H2O molecules together in liquid phase
Explanation: Oxygen is highly electronegative, creating strong O-H hydrogen bonds between H2O molecules. Sulfur is less electronegative, so H2S experiences weaker dipole-dipole forces and cannot form effective hydrogen bonds.

About the SINF6 Chemistry Exam

The Solomon Islands National Form Six Examination (SINF6) Chemistry paper is the national Year 12 chemistry assessment, administered by MEHRD's National Education Assessment Division and timetabled as part of the Solomon Islands School Certificate Level Two (SISCL2). Candidates sit a single three-hour question-and-answer booklet covering atomic structure and bonding, stoichiometry, energetics and kinetics, equilibrium and acid-base chemistry, redox and electrochemistry, organic chemistry, and applied environmental chemistry. In 2026 the Chemistry paper is scheduled for Friday 30 October. The 100 questions on this page are an English-language multiple-choice study adaptation of that syllabus, intended for revision rather than as a simulation of the official written paper.

Assessment

Single 3-hour question-and-answer booklet with 10 minutes of reading time. All sections are compulsory. Candidates show working for quantitative chemistry, draw structures and mechanisms, and write extended explanations directly in the booklet.

Time Limit

3 hours plus 10 minutes reading time (session 9.00 am – 12.10 pm)

Passing Score

MEHRD does not publish a fixed percentage pass mark. Subject scores feed a Year 12 aggregate; for the 2023 sitting MEHRD reported a minimum aggregate of 265 within an aggregate range of 265–500, and 58.8% of that cohort reached or exceeded it.

Exam Fee

No fee. MEHRD's administrative instruction prohibits schools from charging national examination fees for Year 9, Year 11 and Year 12 candidates. (Ministry of Education and Human Resources Development (MEHRD), National Education Assessment Division (NEAD))

SINF6 Chemistry Exam Content Outline

14 questions

Atomic Structure and Bonding

Isotopes and relative atomic mass, electron configurations, ionisation energy trends, bond polarity, VSEPR shapes, hybridisation, lattice energy and intermolecular forces.

18 questions

Stoichiometry and Chemical Calculations

Moles, empirical and molecular formulae, concentration and dilution, limiting reagents, yield and atom economy, gas laws, titration and gravimetric analysis.

14 questions

Energetics and Kinetics

Enthalpy changes, calorimetry, Hess's law, bond enthalpies, Born-Haber cycles, rate laws, the Arrhenius equation, mechanisms and catalysis.

16 questions

Equilibrium and Acids and Bases

Kc and Kp, Le Chatelier's principle, the Haber process, pH calculations, buffers, indicators, salt hydrolysis and solubility product.

14 questions

Oxidation-Reduction and Electrochemistry

Oxidation states, redox balancing and titration, electrode potentials and cell EMF, electrolysis, Faraday's laws, disproportionation and corrosion protection.

16 questions

Organic Chemistry

Nomenclature, isomerism, reaction mechanisms, alcohol oxidation, carbonyl tests, reduction, esterification, polymers and relative acidity.

8 questions

Environmental and Applied Chemistry

Ocean acidification, biochemical oxygen demand, metal extraction, ozone depletion, greenhouse gas absorption, the Contact process and reverse osmosis.

How to Pass the SINF6 Chemistry Exam

What You Need to Know

  • Passing score: MEHRD does not publish a fixed percentage pass mark. Subject scores feed a Year 12 aggregate; for the 2023 sitting MEHRD reported a minimum aggregate of 265 within an aggregate range of 265–500, and 58.8% of that cohort reached or exceeded it.
  • Assessment: Single 3-hour question-and-answer booklet with 10 minutes of reading time. All sections are compulsory. Candidates show working for quantitative chemistry, draw structures and mechanisms, and write extended explanations directly in the booklet.
  • Time limit: 3 hours plus 10 minutes reading time (session 9.00 am – 12.10 pm)
  • Exam fee: No fee. MEHRD's administrative instruction prohibits schools from charging national examination fees for Year 9, Year 11 and Year 12 candidates.

Keys to Passing

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

SINF6 Chemistry Study Tips from Top Performers

1Set out every mole calculation in full: moles, ratio, then the required quantity. The written sections award method marks for the ratio step even if arithmetic slips.
2Learn to identify the limiting reagent before calculating yield; this single habit prevents the most common stoichiometry error.
3For equilibrium questions, state the direction of shift and the reason (pressure, temperature or concentration) separately, because both earn credit.
4Practise drawing organic mechanisms with curly arrows starting from a lone pair or a bond, not from an atom.
5Memorise the standard tests: Tollens' for aldehydes, acidified dichromate colour change, and the solubility rules used in gravimetric analysis.
6Rehearse the full three-hour paper so you can allocate time between quick recall items and the longer calculation and explanation questions.

Frequently Asked Questions

What is the SINF6 Chemistry examination?

It is the national Form 6 (Year 12) chemistry paper administered by MEHRD's National Education Assessment Division, forming part of the Solomon Islands National Form Six School Certificate, now timetabled as the Solomon Islands School Certificate Level Two (SISCL2).

When is the 2026 SINF6 Chemistry examination?

MEHRD has scheduled Chemistry for Friday 30 October 2026, with 10 minutes of reading time and a 3-hour paper running from 9.00 am to 12.10 pm. Economics is timetabled on the same day.

How many questions are on the official paper?

MEHRD does not publish a fixed item count. The paper is a single question-and-answer booklet with compulsory sections that combine multiple choice with written calculation and extended response.

Is this practice bank the same format as the real exam?

No. The official paper requires written working, structural formulae and extended explanations. These 100 items are an English-language multiple-choice study adaptation covering the same syllabus content, designed for revision and self-checking rather than format simulation.

Is there a fee to sit SINF6 Chemistry?

No. MEHRD's administrative instruction to schools prohibits charging national examination fees for Year 9, Year 11 and Year 12 candidates.

What mark do I need to pass?

MEHRD does not publish a fixed percentage pass mark per subject. Subject scores contribute to a Year 12 aggregate; for the 2023 sitting MEHRD reported a minimum aggregate of 265 on a 265–500 range, and the overall 2025 Year 12 pass rate was 53.8%.

Can I use a calculator?

Candidates are expected to bring a silent, non-programmable scientific calculator for the quantitative chemistry in the paper. Mobile phones are not permitted in the examination room.

In what language is the examination set?

English. English is the language of instruction and assessment in Solomon Islands secondary schools, so this bank is in the same language as the official paper.