PracticeVideosBlogFlashcardsEspañol
All Practice Exams

Free Practice Questions for Cambodia Bac II Science

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card
Exam pass rate: 84.06% (2026 sitting)
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Cambodia Baccalauréat II Examinations (Bac II / Bak Touk — MoEYS)

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

Cambodia Upper Secondary Certificate Examination (Bac II) — Social Science Stream

Practice Questions
Exam Review

Key Facts: Cambodia Bac II Science Exam

7 papers

Written science-stream subjects in the 2026 Bac II sitting

AKP citing MoEYS, 10 August 2026

37,445

Science-stream candidates registered for the 2026 sitting

AKP citing MoEYS, 10 August 2026

84.06%

National Bac II pass rate in 2026 (all streams)

MoEYS 2026 results as reported by Khmer Times / Cambodianess

2 days

2026 written timetable (10–11 August)

AKP citing MoEYS, 10 August 2026

Free 100-question English MCQ practice for Cambodia's Bac II Science examination. Official exam: seven written papers over two days in Khmer (foreign language in English or French). Independent OpenExamPrep study aid, not an official-format simulation.

Sample Cambodia Bac II Science Practice Questions

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

1What is the limit of (x^2 - 5x + 6) / (x - 2) as x approaches 2?
A.-1
B.0
C.1
D.2
Explanation: Factor the numerator as (x - 2)(x - 3). For x not equal to 2, the expression simplifies to x - 3. As x approaches 2, the value therefore approaches 2 - 3 = -1.
2Evaluate the limit lim(x -> 0) [sin(5x) / (2x)].
A.0
B.1
C.5/2
D.2/5
Explanation: Using the fundamental trigonometric limit lim(u -> 0) [sin(u) / u] = 1, we rewrite the expression as (5/2) * [sin(5x) / (5x)]. As x approaches 0, the limit is (5/2) * 1 = 5/2.
3Find the derivative f'(x) of the function f(x) = 3x^4 - 5x^2 + 7x - 2.
A.12x^3 - 10x + 7
B.12x^3 - 10x^2 + 7
C.7x^3 - 10x + 7
D.12x^4 - 10x^2 + 7
Explanation: Applying the power rule d/dx[x^n] = n*x^(n-1) term by term gives d/dx[3x^4] = 12x^3, d/dx[-5x^2] = -10x, d/dx[7x] = 7, and d/dx[-2] = 0. The sum is 12x^3 - 10x + 7.
4What is the slope of the tangent line to the curve y = 2x^3 - 4x + 1 at the point where x = 2?
A.8
B.16
C.20
D.24
Explanation: The derivative is y' = 6x^2 - 4. Substituting x = 2 into y' gives 6(2)^2 - 4 = 6(4) - 4 = 24 - 4 = 20.
5If f(x) = (2x + 1) / (x - 3), what is f'(x)?
A.-7 / (x - 3)^2
B.7 / (x - 3)^2
C.-5 / (x - 3)^2
D.2 / (x - 3)^2
Explanation: Using the quotient rule f'(x) = [u'v - uv'] / v^2 with u = 2x + 1 and v = x - 3: u' = 2, v' = 1. Thus f'(x) = [2(x - 3) - (2x + 1)(1)] / (x - 3)^2 = [2x - 6 - 2x - 1] / (x - 3)^2 = -7 / (x - 3)^2.
6Find the derivative of the function g(x) = ln(x^2 + 4).
A.1 / (x^2 + 4)
B.2x / (x^2 + 4)
C.x / (x^2 + 4)
D.2x * ln(x^2 + 4)
Explanation: By the chain rule for logarithmic functions, d/dx[ln(u)] = u' / u. Here u = x^2 + 4, so u' = 2x. Thus g'(x) = 2x / (x^2 + 4).
7What is the indefinite integral int (3x^2 - 4x + 5) dx?
A.x^3 - 2x^2 + 5x + C
B.6x - 4 + C
C.3x^3 - 4x^2 + 5x + C
D.x^3 - 4x^2 + 5x + C
Explanation: Integrating term by term gives (3/3)x^3 - (4/2)x^2 + 5x + C = x^3 - 2x^2 + 5x + C.
8Evaluate the definite integral int_0^2 (3x^2 + 2x) dx.
A.8
B.10
C.12
D.16
Explanation: The antiderivative is [x^3 + x^2] evaluated from 0 to 2. At x = 2, we have (2)^3 + (2)^2 = 8 + 4 = 12. At x = 0, it is 0. Thus the result is 12 - 0 = 12.
9Using integration by parts, evaluate int x * e^x dx.
A.e^x * (x - 1) + C
B.e^x * (x + 1) + C
C.x^2 * e^x / 2 + C
D.e^x + x + C
Explanation: Let u = x (so du = dx) and dv = e^x dx (so v = e^x). Using int u dv = uv - int v du gives x*e^x - int e^x dx = x*e^x - e^x + C = e^x * (x - 1) + C.
10Find the general solution to the first-order differential equation y' - 3y = 0.
A.y = C * e^(3x)
B.y = C * e^(-3x)
C.y = 3x + C
D.y = C * x^3
Explanation: Rewriting as dy/y = 3 dx and integrating both sides yields ln|y| = 3x + C_1, which gives y = C * e^(3x) where C is an arbitrary real constant.

About the Cambodia Bac II Science Exam

The Upper Secondary School Certificate Examination (Baccalauréat II / Bac II / បាក់ឌុប — Bak Touk) Science Stream is Cambodia's national Grade 12 completion and university-entrance examination administered by MoEYS. The 2025–2026 sitting ran on 10–11 August 2026 at 244 centres, with 37,445 science-stream candidates among 151,238 registrants (AKP). Official papers are written in Khmer except the foreign-language paper (English or French). This free practice bank is an independent English-language MCQ study adaptation of science-stream knowledge, not an official translation or a substitute for written-paper practice.

Exam sponsor: Ministry of Education, Youth and Sport (MoEYS) / ក្រសួងអប់រំ យុវជន និងកីឡា. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Seven written papers. AKP (10 August 2026) lists the science-stream timetable as history, biology, chemistry, and foreign languages on day 1, then Khmer literature, physics, and mathematics on day 2. Documented MoEYS science-track mark maxima (MoEYS 2010a via CDRI WP 133; 2022 press) are Mathematics 125, Physics 75, Chemistry 75, Biology 75, Khmer literature 75, History 50, and a foreign-language paper marked /50 with at most 25 marks counted toward a 500-point aggregate. This 100-question bank is an English-language MCQ study adaptation, not an official-format simulation.

Time Limit

Two written days (10–11 August 2026 sitting)

Passing Score

MoEYS letter grades A–E. 2026 pass rate 84.06% (125,975 candidates). Numeric 2026 cut score not republished on the MoEYS public portal.

Exam / Certification Fees

Not published as a candidate sitting fee (state-organized national examination)

Exam sponsor website

Reported exam pass rate: 84.06% (2026 sitting). This describes exam candidates, not OpenExamPrep users or results from using our resources. 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.

125 marks

Mathematics

Calculus, limits, differential equations, complex numbers, probability, and spatial geometry.

75 marks

Physics

Oscillations, AC circuits, electromagnetic waves, wave optics, and radioactivity.

75 marks

Chemistry

Chemical kinetics, equilibria, acid-base systems, organic chemistry, and electrochemistry.

75 marks

Biology

Molecular genetics, Mendelian genetics, human physiology, and ecology.

75 marks

Khmer Literature

Literary analysis of classic works, poetic meters, grammar, and essay structure.

50 marks

History

Modern Cambodian history, independence, the Khmer Rouge period, and the 1991 Paris Peace Agreements.

Paper /50; at most 25 toward 500

Foreign Language (English or French)

Grammar, reading comprehension, vocabulary, and sentence transformation.

Preparing for the Cambodia Bac II Science Exam

What You Need to Know

  • Passing score: MoEYS letter grades A–E. 2026 pass rate 84.06% (125,975 candidates). Numeric 2026 cut score not republished on the MoEYS public portal.
  • Assessment: Seven written papers. AKP (10 August 2026) lists the science-stream timetable as history, biology, chemistry, and foreign languages on day 1, then Khmer literature, physics, and mathematics on day 2. Documented MoEYS science-track mark maxima (MoEYS 2010a via CDRI WP 133; 2022 press) are Mathematics 125, Physics 75, Chemistry 75, Biology 75, Khmer literature 75, History 50, and a foreign-language paper marked /50 with at most 25 marks counted toward a 500-point aggregate. This 100-question bank is an English-language MCQ study adaptation, not an official-format simulation.
  • Time limit: Two written days (10–11 August 2026 sitting)
  • Exam / certification fees: Not published as a candidate sitting fee (state-organized national examination) 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

Cambodia Bac II Science: Suggested Study Strategy

1Spend the largest share of review time on mathematics, which carries the highest documented science-track mark maximum (125).
2Practice quantitative problem-solving in physics, chemistry, and biology together; those three papers sit on day 1 (biology, chemistry) and day 2 (physics) of the 2026 timetable.
3Review Tum Teav, Kolab Pailin, Sophat, and Khmer poetic meters for the 75-mark Khmer literature paper on day 2.
4Memorize the independence, Sangkum, Khmer Rouge, and 1991 Paris Peace Agreement timeline for the science-stream history paper.
5Treat the foreign-language paper as English or French skill practice; it does not convert this bank into an official-language simulation.

Frequently Asked Questions

Is the official Cambodia Bac II Science exam multiple choice?

No. The official Bac II examination consists of written problem-solving, structured questions, and essay papers administered in Khmer, with a foreign-language paper in English or French. This bank is an English-language MCQ study adaptation, not an official translation or format simulation.

Which subjects did science-stream candidates sit in August 2026?

Agence Kampuchea Presse, citing MoEYS, reported that science-stream candidates sat history, biology, chemistry, and foreign languages on 10 August 2026, then Khmer literature, physics, and mathematics on 11 August 2026.

How is the Bac II result reported?

MoEYS publishes letter grades A through E plus fail. For the 2026 sitting, 125,975 candidates passed (84.06%), including 2,022 Grade A results. A numeric 2026 point cut was not republished on the MoEYS public portal.

Does OpenExamPrep's bank replace the official written papers?

No. Independent OpenExamPrep MCQs help learners review science-stream concepts in English. They are not an official MoEYS paper, not a Khmer-language sitting, and not a substitute for writing-intensive practice.