PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free NSSCAS Chemistry (8224) Practice Questions

Prepare for the Namibia Senior Secondary Certificate Advanced Subsidiary Level Chemistry (Syllabus 8224) exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
Not published by DNEA Pass Rate
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Namibia Senior Secondary Certificate Advanced Subsidiary (NSSCAS)

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

NSSCAS Accounting (8244)

Practice Questions

NSSCAS Afrikaans First Language (8166)

Practice Questions

NSSCAS Afrikaans Second Language (8201)

Practice Questions

NSSCAS Agricultural Science (8222)

Practice Questions

NSSCAS Art and Design (8251)

Practice Questions

NSSCAS Biology (8223)

Practice Questions
2026 Statistics

Key Facts: NSSCAS Chemistry (8224) Exam

8224

Official NSSCAS Chemistry syllabus code

NIED NSSCAS Chemistry syllabus

40 + 60 + 40

Paper 1 + Paper 2 + Paper 3 marks (total 140)

NIED NSSCAS Chemistry scheme of assessment

31% + 46% + 23%

Paper 1 + Paper 2 + Paper 3 weighting

NIED NSSCAS Chemistry syllabus

1 h + 1 h 15 + 2 h

Paper 1 + Paper 2 + Paper 3 durations

NIED NSSCAS Chemistry syllabus

a–e

Available letter grades (Ungraded below e)

NIED NSSCAS grading and reporting

180 h

Guided learning hours (one-year course guidance)

NIED NSSCAS Chemistry additional information

100

Free practice MCQs on this page

OpenExamPrep study adaptation

NSSCAS Chemistry 8224 is assessed through three compulsory English papers: Paper 1 MCQ (40 marks, 1 h, 31%), Paper 2 structured theory (60 marks, 1 h 15 min, 46%), and Paper 3 Advanced Practical Skills (40 marks, 2 h, 23%), totalling 140 marks with grades a–e. The 100 questions on this page are an English-language MCQ study adaptation, not an official DNEA multi-paper simulation.

Sample NSSCAS Chemistry (8224) Practice Questions

Try these sample questions to test your NSSCAS Chemistry (8224) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On the carbon-12 scale, the relative atomic mass of an element is defined as:
A.The mass of one atom of the element in grams
B.The weighted mean mass of an atom of the element compared with 1/12 of the mass of a carbon-12 atom
C.The mass number of the most abundant isotope
D.The number of protons in the nucleus
Explanation: Relative atomic mass (Ar) is the weighted mean mass of the isotopes of an element relative to 1/12 of the mass of a ¹²C atom.
2The Avogadro constant L is approximately 6.02 × 10²³ mol⁻¹. How many molecules are in 0.250 mol of CO₂?
A.1.505 × 10²³
B.2.408 × 10²³
C.6.02 × 10²³
D.2.408 × 10²⁴
Explanation: Number of molecules = n × L = 0.250 × 6.02 × 10²³ = 1.505 × 10²³.
3An element has isotopes with mass numbers 63 (69.2% abundance) and 65 (30.8% abundance). What is its relative atomic mass to three significant figures?
A.63.0
B.63.6
C.64.0
D.65.0
Explanation: Ar = (63 × 0.692) + (65 × 0.308) = 43.596 + 20.020 = 63.616 ≈ 63.6 (three sig figs).
4A compound contains 40.0% C, 6.7% H and 53.3% O by mass. What is its empirical formula? (Ar: C = 12.0, H = 1.0, O = 16.0)
A.CHO
B.CH₂O
C.C₂H₄O
D.C₂H₂O
Explanation: Assume 100 g: C 40.0/12.0 = 3.33; H 6.7/1.0 = 6.7; O 53.3/16.0 = 3.33. Divide by 3.33 → C₁H₂O₁ → CH₂O.
5A hydrocarbon has empirical formula CH₂ and relative molecular mass 56. What is its molecular formula?
A.CH₂
B.C₂H₄
C.C₃H₆
D.C₄H₈
Explanation: Empirical formula mass = 12 + 2 = 14. n = Mr / empirical mass = 56/14 = 4. Molecular formula = C₄H₈.
6What is the concentration of a solution containing 5.85 g of NaCl in 250 cm³ of solution? (Mr(NaCl) = 58.5)
A.0.100 mol dm⁻³
B.0.250 mol dm⁻³
C.0.400 mol dm⁻³
D.1.00 mol dm⁻³
Explanation: n = 5.85/58.5 = 0.100 mol. Volume = 0.250 dm³. c = n/V = 0.100/0.250 = 0.400 mol dm⁻³.
725.0 cm³ of 0.200 mol dm⁻³ HCl is completely neutralised by 20.0 cm³ of NaOH. What is the concentration of the NaOH?
A.0.160 mol dm⁻³
B.0.200 mol dm⁻³
C.0.250 mol dm⁻³
D.0.400 mol dm⁻³
Explanation: HCl + NaOH → NaCl + H₂O (1:1). n(HCl) = 0.0250 × 0.200 = 0.00500 mol = n(NaOH). c(NaOH) = 0.00500/0.0200 = 0.250 mol dm⁻³.
8Using molar volume 24.0 dm³ mol⁻¹ at room conditions, what volume of hydrogen is produced at room conditions when 0.100 mol of zinc reacts with excess dilute H₂SO₄? Zn + H₂SO₄ → ZnSO₄ + H₂
A.1.20 dm³
B.2.40 dm³
C.12.0 dm³
D.24.0 dm³
Explanation: 1 mol Zn produces 1 mol H₂. n(H₂) = 0.100 mol. V = 0.100 × 24.0 = 2.40 dm³.
9At s.t.p. the molar gas volume is 22.4 dm³ mol⁻¹. How many moles of oxygen are in 5.60 dm³ of O₂ at s.t.p.?
A.0.125
B.0.250
C.0.500
D.1.00
Explanation: n = V/Vm = 5.60/22.4 = 0.250 mol.
10What is the percentage by mass of nitrogen in ammonium nitrate, NH₄NO₃? (Ar: H = 1.0, N = 14.0, O = 16.0)
A.17.5%
B.28.0%
C.35.0%
D.42.0%
Explanation: Mr(NH₄NO₃) = 14 + 4 + 14 + 48 = 80.0. %N = (2 × 14.0)/80.0 × 100% = 35.0%.

About the NSSCAS Chemistry (8224) Exam

NSSCAS Chemistry (8224) is Namibia’s Advanced Subsidiary senior secondary chemistry qualification for Grade 12, designed as a one-year course after NSSCO Chemistry. The NIED syllabus covers particulate matter and stoichiometry (including pV = nRT), physical chemistry (energetics, electrochemistry, equilibria, kinetics), inorganic chemistry (periodicity, Groups 2 and 17, transition elements, nitrogen and sulfur), and organic chemistry with analysis.

Assessment

Paper 1: Theory multiple choice — 40 four-choice items, 40 marks, 1 hour, 31%. Paper 2: Theory structured and free-response — 60 marks, 1 hour 15 minutes, 46%. Paper 3: Advanced Practical Skills (laboratory) — 40 marks, 2 hours, 23%. Combined total 140 marks. All three papers compulsory. English papers. Qualitative analysis notes (Annexe D) are supplied with Paper 3; data booklet constants are available for Papers 1 and 2.

Time Limit

Paper 1: 1 hour; Paper 2: 1 hour 15 minutes; Paper 3: 2 hours

Passing Score

Letter grades a–e (a highest, e lowest; Ungraded = below e). No single published numeric percentage pass mark in the NIED syllabus.

Exam Fee

DNEA per-subject NSSCAS entry fee not confirmed from an official DNEA circular at time of writing — confirm with DNEA or your examination centre. Do not use NAMCOL tuition fees as a substitute. (Directorate of National Examinations and Assessment (DNEA); syllabus by Namibia Institute for Educational Development (NIED))

NSSCAS Chemistry (8224) Exam Content Outline

Theme 1

Particulate Nature of Matter and Stoichiometry

Relative masses on the ¹²C scale; mole and Avogadro constant; mass spectra; empirical/molecular formulae; solution and gas stoichiometry; ideal vs real gases and pV = nRT (R = 8.31 J K⁻¹ mol⁻¹; Vm = 22.4 dm³ mol⁻¹ at s.t.p., 24.0 dm³ mol⁻¹ under room conditions).

Theme 2

Physical Chemistry

Enthalpy definitions, calorimetry and Hess’s law; redox, oxidation numbers and electrolysis; chemical and ionic equilibria (Kc, Le Chatelier, pH of strong acids); rates, Boltzmann distribution and catalysis.

Theme 3

Inorganic Chemistry

Period 3 trends and oxides; Group 2 reactivity and carbonate stability; transition metal properties and complexes; Group 17 displacement and chlorine–alkali chemistry; nitrogen compounds and sulfur dioxide/acid rain; Haber and Contact process conditions.

Theme 4

Organic Chemistry and Analysis

Homologous series; alkane free-radical substitution and alkene reactions; halogenoalkanes; alcohol classification and oxidation; isomerism (structural, cis–trans, optical); carbonyl and carboxylic acid chemistry; IR and qualitative organic tests as in the syllabus.

How to Pass the NSSCAS Chemistry (8224) Exam

What You Need to Know

  • Passing score: Letter grades a–e (a highest, e lowest; Ungraded = below e). No single published numeric percentage pass mark in the NIED syllabus.
  • Assessment: Paper 1: Theory multiple choice — 40 four-choice items, 40 marks, 1 hour, 31%. Paper 2: Theory structured and free-response — 60 marks, 1 hour 15 minutes, 46%. Paper 3: Advanced Practical Skills (laboratory) — 40 marks, 2 hours, 23%. Combined total 140 marks. All three papers compulsory. English papers. Qualitative analysis notes (Annexe D) are supplied with Paper 3; data booklet constants are available for Papers 1 and 2.
  • Time limit: Paper 1: 1 hour; Paper 2: 1 hour 15 minutes; Paper 3: 2 hours
  • Exam fee: DNEA per-subject NSSCAS entry fee not confirmed from an official DNEA circular at time of writing — confirm with DNEA or your examination centre. Do not use NAMCOL tuition fees as a substitute.

Keys to Passing

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

NSSCAS Chemistry (8224) Study Tips from Top Performers

1Drill quantitative work daily: moles, concentrations, empirical/molecular formulae, gas volumes at s.t.p. vs room conditions, and pV = nRT with consistent units.
2Learn exact definitions (first ionisation energy, ΔH_f°, dynamic equilibrium, Brønsted–Lowry acid) — examiners report mark loss from missing key words such as ‘gaseous atoms’.
3Practise Hess cycles, bond-energy estimates, Kc calculations (no quadratics required), and strong-acid pH; show steps and use the required significant figures.
4Link Theme 3 trends to explanations: polarising power for Group 2 carbonates, displacement order for halogens, and industrial compromises of rate vs yield (Haber/Contact).
5For organic, classify alcohols (1°/2°/3°), match reagents/conditions to products, and use IR and Tollens-type tests as identification tools — not only mechanism names.

Frequently Asked Questions

What is NSSCAS Chemistry 8224?

Syllabus 8224 is the Namibia Senior Secondary Certificate Advanced Subsidiary Level Chemistry syllabus published by NIED for Grade 12 and examined by DNEA. It is a one-year course after NSSCO and covers four themes: stoichiometry and structure, physical chemistry, inorganic chemistry, and organic chemistry with analysis.

What is the paper structure for NSSCAS Chemistry?

All candidates take three compulsory papers: Paper 1 multiple choice (40 marks, 1 hour, 31%), Paper 2 structured theory (60 marks, 1 hour 15 minutes, 46%), and Paper 3 Advanced Practical Skills laboratory paper (40 marks, 2 hours, 23%), for a combined total of 140 marks. Papers are set in English.

What grades are awarded for NSSCAS Chemistry?

Results are reported on letter grades a–e (a highest, e lowest). Ungraded means the candidate did not reach the minimum standard for grade e. The NIED syllabus does not publish a single numeric percentage pass mark; grade boundaries are set by the examining authority for each series.

How much does NSSCAS Chemistry entry cost?

A verified DNEA per-subject NSSCAS entry fee was not confirmed from an official DNEA circular at the time this page was written. Confirm current fees with DNEA or your examination centre. Do not treat NAMCOL tuition or course fees as the examination entry fee.

Are these official DNEA examination questions?

No. Official NSSCAS Chemistry uses Paper 1 MCQ plus structured theory and a laboratory practical paper. This bank is an original English-language MCQ study adaptation aligned to syllabus 8224 for practice of AS-level chemistry knowledge and calculations — it does not simulate Papers 2–3 format or the timed practical.

What gas constants does the syllabus data booklet use?

The NIED NSSCAS Chemistry data booklet gives R = 8.31 J K⁻¹ mol⁻¹, L = 6.02 × 10²³ mol⁻¹, molar volume 22.4 dm³ mol⁻¹ at s.t.p. and 24.0 dm³ mol⁻¹ under room conditions, Kw = 1.00 × 10⁻¹⁴ mol² dm⁻⁶ at 298 K, and specific heat capacity of water 4.18 J g⁻¹ K⁻¹.