100+ Free SSLC Chemistry Practice Questions

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2026 Statistics

Key Facts: SSLC Chemistry Exam

3 hours + 10 min

Official 2025 paper duration including reading time

Official 2025 SSLC Chemistry booklet (MEC)

7 strands / 100 marks

Official 2025 mark table

Official 2025 SSLC Chemistry booklet (MEC)

9–19 Nov 2026

2026 national secondary examination window

MEC 2026 National Secondary Examinations Timetable announcement

100

Free practice questions in this bank

OpenExamPrep question bank

Samoa SSLC Chemistry is a 3-hour-plus-10-minute national written paper marked out of 100. The 2026 national secondary window is 9–19 November. This free bank supplies 100 multiple-choice revision questions weighted to the official 2025 strands.

Sample SSLC Chemistry Practice Questions

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

1A neutral atom of magnesium-24 has atomic number 12. How many protons, neutrons, and electrons does it contain?

A.12 protons, 12 neutrons, 12 electrons

B.12 protons, 24 neutrons, 12 electrons

C.24 protons, 12 neutrons, 24 electrons

D.12 protons, 12 neutrons, 24 electrons

Explanation: Atomic number 12 is the proton count. A neutral atom has 12 electrons. Neutrons = mass number − atomic number = 24 − 12 = 12.

2Which statement best describes an ionic bond?

A.Electrostatic attraction after electrons transfer from a metal atom to a non-metal atom

B.Sharing of a pair of electrons between two non-metal atoms

C.Attraction between a lattice of metal cations and a sea of delocalized electrons

D.A weak attraction between temporary dipoles in neighbouring molecules

Explanation: Ionic bonding forms when a metal loses electrons and a non-metal gains them, producing oppositely charged ions that attract electrostatically.

3Which subatomic particle has a relative charge of zero?

A.Neutron

B.Proton

C.Electron

D.Alpha particle

Explanation: A neutron is electrically neutral (relative charge 0). Protons are +1, electrons are −1, and an alpha particle is a He2+ nucleus.

4Sodium has atomic number 11. What is the ground-state electron arrangement of a sodium atom?

A.2, 8, 1

B.2, 8, 8

C.2, 8

D.2, 9

Explanation: Eleven electrons fill shells as 2, 8, 1. The single outer electron is why sodium forms Na+.

5A covalent bond is best described as:

A.a shared pair of electrons between two atoms

B.the transfer of one or more electrons from one atom to another

C.the attraction of metal ions for mobile electrons

D.an attraction between oppositely charged ions only

Explanation: In a covalent bond two atoms, usually non-metals, share one or more electron pairs so each atom can complete its outer shell.

6Which ion has the largest ionic radius?

A.I−

B.F−

C.Cl−

D.Br−

Explanation: Iodide has the most electron shells of the Group 17 anions, so I− is the largest. Ionic radius increases down a group as extra shells are added.

7According to VSEPR theory, what is the molecular shape of ammonia, NH3?

A.Trigonal pyramidal

B.Trigonal planar

C.Tetrahedral

D.Linear

Explanation: Nitrogen has four electron domains: three N−H bonds and one lone pair. The domains are tetrahedral, but the three atoms form a trigonal pyramidal molecule.

8Why is a sodium ion, Na+, smaller than a sodium atom?

A.Na+ has lost the outer 3s electron, leaving only two occupied shells and a greater protons-to-electrons ratio

B.Na+ has gained an extra electron shell

C.Na+ has more electrons than the atom, increasing repulsion

D.The nuclear charge of Na+ is smaller than that of the atom

Explanation: Na is 2,8,1. Forming Na+ removes the 3s electron, leaving 2,8. The same 11 protons now attract only 10 electrons, so the ion is much smaller.

9Metals such as aluminium can be hammered into thin sheets. Which bonding feature best explains this malleability?

A.Layers of cations can slide over one another while remaining attracted to the delocalized electrons

B.Each metal atom is locked to its neighbours by rigid, directional covalent bonds

C.Ionic bonds break and reform as the crystal is deformed

D.Weak intermolecular forces allow the atoms to separate completely

Explanation: Metallic structure is a cation lattice in a sea of delocalized electrons. Sliding layers stay bonded to that electron sea, so the metal deforms instead of shattering.

10Which of the following molecules is polar?

A.H2O

B.CO2

C.CH4

D.N2

Explanation: Water is bent with two lone pairs, so the O−H bond dipoles do not cancel and the molecule has a net dipole. CO2 and CH4 are symmetric and non-polar; N2 is a homonuclear diatomic molecule.

About the SSLC Chemistry Exam

SSLC Chemistry is the Year 12 national chemistry paper for the Samoa Secondary Leaving Certificate. The official 2025 booklet is a 3-hour-and-10-minute English written paper scored out of 100 marks, with a periodic table attached. This bank is an English-language multiple-choice study adaptation of the official strands, including genuine quantitative items. It is not a simulation of written working or practical assessment.

Assessment

Single English-language question-and-answer booklet with a periodic table. Time allowed: 3 hours and 10 minutes, including 10 minutes reading time. Official 2025 strands: Atomic Structure and Bonding 15, Quantitative Chemistry 17, Organic Chemistry 19, Inorganic Chemistry 10, Principles of Physical Chemistry 10, Oxidation and Reduction 20, Environmental Chemistry 9.

Time Limit

3 hours plus 10 minutes reading time

Passing Score

Not published as a fixed percentage on official SSLC papers. Subject papers are marked out of 100. NUS foundation science courses have used ≥50% in SSLC Biology, Chemistry or Physics as a tertiary-entry threshold.

Exam Fee

MEC publishes national SSLC examination fees (2025 and 2026 official notices). The SAT amount is not stated on the public examination-paper pages. (Ministry of Education and Culture (MEC), Government of Samoa)

SSLC Chemistry Exam Content Outline

15 questions

Atomic Structure and Bonding

Atoms, ions, electron arrangement, ionic, covalent and metallic bonding.

17 questions

Quantitative Chemistry

Moles, empirical formulae, reacting masses and solution calculations.

19 questions

Organic Chemistry

Hydrocarbons, functional groups, isomers and characteristic reactions.

10 questions

Inorganic Chemistry

Periodic trends and selected inorganic reactions.

10 questions

Principles of Physical Chemistry

Energy changes, rates and chemical equilibrium.

20 questions

Oxidation and Reduction

Oxidation numbers, redox equations and electrochemical ideas.

9 questions

Environmental Chemistry

Air, water and applied environmental chemistry.

How to Pass the SSLC Chemistry Exam

What You Need to Know

Passing score: Not published as a fixed percentage on official SSLC papers. Subject papers are marked out of 100. NUS foundation science courses have used ≥50% in SSLC Biology, Chemistry or Physics as a tertiary-entry threshold.
Assessment: Single English-language question-and-answer booklet with a periodic table. Time allowed: 3 hours and 10 minutes, including 10 minutes reading time. Official 2025 strands: Atomic Structure and Bonding 15, Quantitative Chemistry 17, Organic Chemistry 19, Inorganic Chemistry 10, Principles of Physical Chemistry 10, Oxidation and Reduction 20, Environmental Chemistry 9.
Time limit: 3 hours plus 10 minutes reading time
Exam fee: MEC publishes national SSLC examination fees (2025 and 2026 official notices). The SAT amount is not stated on the public examination-paper pages.

Keys to Passing

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

SSLC Chemistry Study Tips from Top Performers

1Do every mole calculation on paper before looking at options.

2Assign oxidation numbers before you try to balance a redox equation.

3Learn homologous-series functional groups and their characteristic tests.

4Use the supplied periodic table: do not memorise relative atomic masses that the paper already gives.

5These MCQs do not replace practical titration or written working practice.

Frequently Asked Questions

What is SSLC Chemistry?

It is the Year 12 national chemistry paper for the Samoa Secondary Leaving Certificate, administered by the Ministry of Education and Culture.

Is a periodic table provided?

Yes. The official 2025 booklet states that the periodic table is attached to the exam paper.

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

No. The official paper is a mixed written booklet. These 100 questions are an English-language multiple-choice study adaptation covering the same official strands.

In what language is the official paper set?

English. The official 2025 SSLC Chemistry booklet is an English-language paper.

When are the 2026 SSLC examinations?

MEC announced the 2026 national secondary examinations for 9–19 November 2026.

100+ Free SSLC Chemistry Practice Questions

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