How to Answer SPM Chemistry Paper 3 (Kertas 3 Kimia): A Guide for Students Short on Time

Sijil Pelajaran Malaysia (SPM) Chemistry Paper 3 is probably the paper you have spent the least time on. It is a short practical test worth only 15 marks, so most revision hours go to Papers 1 and 2.

It is also the most predictable Chemistry paper. The same kinds of question come up again and again, and the marking scheme rewards the same habits each time.

We worked through six recent trial papers and their marking schemes, from Kedah, Maktab Rendah Sains MARA (MRSM), Johor and two more 2026 trial sets. For each question type below, you will see the general rule first, then how a real marking scheme awarded the marks.

What is SPM Chemistry Paper 3?

SPM Chemistry Paper 3, or Kimia Kertas 3, is the practical test (ujian amali) for SPM Chemistry. Its paper code is 4541/3.^[1]

Instead of answering from memory, you carry out a short experiment in the lab, then answer questions on what you observed and measured.

It tests science process skills such as measuring, recording data, controlling variables, interpreting results and predicting, far more than it tests what you can recall.

What is the format of Kertas 3 Kimia?

All six papers we reviewed followed the same structure.

The test opens with a candidate checklist (senarai semak calon). You tick off each item of apparatus and each material on the list before you start, and you may not use the apparatus during these first five minutes.^[2]

For SPM 2026, the Chemistry practical is on Tuesday, 17 November 2026. Your school assigns your session, so check the official Lembaga Peperiksaan timetable, or our SPM 2026 timetable, for yours.^[3]

What do recent trial papers tell us about Paper 3?

We reviewed six trial papers and their official marking schemes.^[4]

We sorted every mark in the six schemes by the skill it rewards. Of the 90 marks, 63 (70%) went to technique: recording data, stating variables, planning, definitions, classifying, hypotheses and graphs.

About a quarter (22 marks) went to reasoning from your own results, such as explaining and predicting. Only 5 of the 90 tested chemistry facts directly, such as naming a gas or writing an equation.

One change stood out. None of the 2025 papers asked students to write their own procedure. In 2026, two of the three did, for 4 to 5 marks each time.

Both years 2025 papers 2026 papers

View as table View as chart

Technique : 63 marks, 70%

63 marks 70% 28 marks 62% 35 marks 78%

1. Recording data and observations 21 Recording data and observations: 21 marks. 2025 papers: 11, 2026 papers: 10.
2. Stating variables 12 Stating variables: 12 marks. 2025 papers: 6, 2026 papers: 6.
3. Planning a procedure 9 Planning a procedure: 9 marks. 2025 papers: 0, 2026 papers: 9.
4. Operational definitions 8 Operational definitions: 8 marks. 2025 papers: 4, 2026 papers: 4.
5. Classifying 6 Classifying: 6 marks. 2025 papers: 2, 2026 papers: 4.
6. Plotting and reading a graph 5 Plotting and reading a graph: 5 marks. 2025 papers: 5, 2026 papers: 0.
7. Writing a hypothesis 2 Writing a hypothesis: 2 marks. 2025 papers: 0, 2026 papers: 2.

Reasoning from your own results : 22 marks, 24%

22 marks 24% 14 marks 31% 8 marks 18%

1. Interpreting results 12 Interpreting results: 12 marks. 2025 papers: 7, 2026 papers: 5.
2. Prediction with an explanation 10 Prediction with an explanation: 10 marks. 2025 papers: 7, 2026 papers: 3.

Chemistry facts : 5 marks, 6%

5 marks 6% 3 marks 7% 2 marks 4%

1. Names and equations 5 Names and equations: 5 marks. 2025 papers: 3, 2026 papers: 2.

Where the 90 marks went

Skill	2025 papers	2026 papers	Total
Technique	28	35	63
Recording data and observations	11	10	21
Stating variables	6	6	12
Planning a procedure	0	9	9
Operational definitions	4	4	8
Classifying	2	4	6
Plotting and reading a graph	5	0	5
Writing a hypothesis	0	2	2
Reasoning from your own results	14	8	22
Interpreting results	7	5	12
Prediction with an explanation	7	3	10
Chemistry facts	3	2	5
Names and equations	3	2	5
Total	45	45	90

2025 papers

2026 papers

Total

Source: Afterkelas analysis of six Kimia Kertas 3 trial papers and their marking schemes, 2025 and 2026.

These are trial papers, not the real SPM paper. Experienced teachers write them to match the SPM format, though, so they are a useful guide to what examiners expect.

How do you answer each type of Paper 3 question?

Each question type below starts with the general rule, followed by how a real marking scheme awarded the marks.

1. Use the 5-minute planning time well

The rule: read the apparatus list as a clue to the procedure. Every item on it is usually there for a reason.

In the papers: the 2026 Set A checklist listed red and blue litmus paper and rubber stoppers. The full-mark procedure used every one of them: test with litmus paper first, add water, stopper the test tube and shake it. The MPSM Johor 2026 list also included rubber stoppers, which pointed to a step where you shake the mixture.

2. Planning a procedure

The rule: write short, numbered steps in order. Give the amount of each material and what to look for, and finish with a "repeat using…" step for the other samples.

In the papers: MPSM Johor 2026 gave 1 mark for each of five steps.

1. 1 Put one spatula of the salt into a test tube
2. 2 Add 2 to 5 cm³ of distilled water
3. 3 Shake the mixture
4. 4 Record what you observe
5. Repeat with the other salts

The 2026 Set A paper marked in bands instead. Full marks needed all six steps, including testing with litmus paper before adding water. That first test is the control. Leave it out and the best you can score is 2 out of 4, even with every other step right.

3. Constructing a table

The rule: head each column with the variable and its unit, and give every reading to the same number of decimal places. Then check that your results follow the pattern you would expect.

In the papers: the Kedah 2025 table was worth 4 marks: one each for the heading naming the substance or set, the temperature headings with units, readings to one decimal place, and the correct inference.

The schemes accept your own results within a range. Kedah allowed a temperature rise of 2.0 to 3.0 °C, and the 2026 Set B paper needed the times in the order A < B < C. Results far outside these ranges can lose a mark, so careful lab work still counts.

4. Observation vs inference

The rule: an observation is what you see, hear or measure. An inference is what that observation tells you. Keep them apart.

In the papers: the Johor 2025 observation was a white precipitate that dissolves in excess ammonia solution, and the inference was that zinc ions, Zn²⁺, are present. Writing "zinc ions present" in the observation column does not earn the observation mark.

The 2026 Set B paper asked for one observation and accepted "colourless gas bubbles are released". It did not ask students to name the gas.

ExperimentObservationWhat your eyes or the thermometer showInferenceWhat the observation tells you

1. Cation test Johor 2025

   Observation

   A white precipitate forms and dissolves in excess ammonia solutionEarns the markNo mark

   Inference

   Zinc ions, Zn²⁺, are presentEarns the markNo mark

2. Heat change Kedah 2025

   Observation

   The thermometer reading drops from 29.0 °C to 28.0 °CEarns the markNo mark

   Inference

   The reaction is endothermic: heat is absorbedEarns the markNo mark

3. Acid and substance X 2026 Set B

   Observation

   Colourless gas bubbles are releasedEarns the markNo mark

   Inference

   A gas is produced in the reactionEarns the markNo mark

Each answer sits in its own column, so it can earn its mark.

5. Stating variables

The rule: each variable must be specific and measurable. "The substance" is too vague; "type of substance (A, B and C)" is clear.

In the papers: variables came up in four of the six papers, for 3 marks every time. In MRSM 2025 they were these three.

In the 2026 Set A paper, the manipulated variable was simply "presence of water". Think about what you changed on purpose, and name exactly that.

6. Writing a hypothesis

The rule: link the manipulated variable to the responding variable in one sentence.

In the papers: the 2026 Set A paper gave 2 marks for a statement that covered both sides: with water, a substance shows acidic or alkaline properties; without water, it does not.

7. Operational definitions

The rule: an operational definition describes what you did and what you observed in this experiment. It is not the textbook definition.

In the papers: this question came up in four of the six papers, always for 2 marks, and always in the same shape.

When what you did, what you observed.

1. Endothermic reaction Kedah 2025

   When the substance is added to hydrochloric acid, the thermometer reading decreases.

2. Insoluble salt MPSM Johor 2026

   When distilled water is added to salt Q and shaken, salt Q does not dissolve.

3. Acid 2026 Set A

   When blue litmus paper is placed in a test tube containing substance Y and water, the litmus paper turns red.

8. Prediction with an explanation

The rule: give a value with a unit, then explain why using a chemistry idea.

In the papers: the same idea appeared in two papers a year apart. Both asked what would happen if hydrochloric acid were replaced with sulphuric acid of the same concentration.

Kedah 2025 expected the temperature rise to roughly double. The 2026 Set B paper expected a shorter time, between 5.0 and 10.0 s. Both gave marks for explaining that sulphuric acid is diprotic, so it gives twice the concentration of hydrogen ions.

2026 Set B asked What happens to the time taken if hydrochloric acid is replaced with sulphuric acid of the same concentration?

Typical answer 0 to 1 mark

"The time will be shorter because sulphuric acid is stronger."

No value and no unit, and "stronger" is not the reason the scheme asks for.

Full-mark answer 3 of 3 marks

1. Earns a mark: About 8.0 s, shorter than the time with hydrochloric acid.
2. Earns a mark: Sulphuric acid is diprotic; hydrochloric acid is monoprotic.
3. Earns a mark: So sulphuric acid gives twice the concentration of hydrogen ions, H⁺. The reason the scheme wants

The rate of reaction is higher, so the time is shorter.

Notice that both schemes linked the prediction to the student's own result. If your Set II temperature rose by 2.0 °C, the expected prediction is about 4.0 °C. Your answers have to stay consistent with your own table.

9. Plotting and using a graph

The rule: label both axes with units, use an even scale, plot every point accurately and draw a smooth line. When you read a value off the graph, draw the reading lines on the graph itself.

In the papers: only MRSM 2025 had a graph, but it carried 4 marks on its own, and two later parts depended on it. One asked students to read the time at 25 cm³ and calculate the rate. The other asked them to extrapolate to 40 cm³, with 1 mark for showing the line on the graph. A weak graph put up to 7 of the 15 marks at risk.

Where do students lose marks in Paper 3?

Going by how the six schemes award marks, these are the habits most likely to cost you marks.

Many of these come down to reading the command word carefully. "State" needs one specific point. "Explain" and "Predict" need a reason as well.

The command word tells you how much to write

Command word	What the scheme wants	How much to write	A good start
State Nyatakan	One specific point. No reason needed.		Type of substance…
Classify Kelaskan	Every item sorted into the right group.		Soluble: P, R. Insoluble: Q.
Explain Terangkan	The point, plus a reason linked to chemistry.		Set I absorbs heat, so…
Predict Ramalkan	A value with a unit, plus a reason.		About 8.0 s, because…

How should you prepare for Paper 3 if you are short on time?

With only a few weeks left, focus on the question types that come up most often rather than trying to cover every experiment.

1. 1 Learn the patterns that repeat: tables, variables, definitions and predictions
2. 2 Practise short procedures for common Form 4 and Form 5 experiments
3. 3 Sit two or three trial papers in 40 minutes each, then mark them with the scheme
4. 4 Spend the time you have left on the question types that cost you marks

The common experiments include rate of reaction, heat changes, salts, and acids and alkalis. Where the marks go differs from student to student: some lose them on tables, others on predictions or procedures. The fastest gains usually come from fixing the question types that cost you the most.

How can Afterkelas help with SPM Chemistry Paper 3?

Paper 3 marks are often lost on small details that are hard to spot on your own. A student can know the chemistry well and still lose marks on headings, wording or a missing step.

At Afterkelas (afterkelas.com), our tutors review a student's Paper 3 answers with the same logic as the marking scheme. We find the question types that are costing marks, then focus practice on those in 1-to-1 classes.

You do not need to know where the marks are going before you contact us. Message us on WhatsApp with the subject, and we will help work out the rest. Parents are welcome to get in touch on their child's behalf.

Frequently asked questions

How many marks is SPM Chemistry Paper 3?

Paper 3 (4541/3) is worth 15 marks. It is a 45-minute practical test: 5 minutes to check the apparatus and plan, then 40 minutes to carry out the experiment and answer.

Can I answer Kertas 3 Kimia in English?

Yes. The paper is bilingual, and the trial papers we reviewed accepted answers in either Bahasa Melayu or English.

Which topics come out in SPM Chemistry Paper 3?

Any experiment from the Form 4 and Form 5 syllabus can appear. In the six trial papers we reviewed, the topics were rate of reaction, heat changes, salts, and acids and alkalis. Master the question types, because they repeat across topics.

Does Afterkelas offer help with SPM Chemistry Paper 3?

Yes. Afterkelas tutors can review a student's practice answers, find where marks are being lost and plan focused 1-to-1 classes. You can start at afterkelas.com.

One last thing

Paper 3 can feel like the paper you have the least time for. Its questions follow such clear patterns, though, that a few focused weeks can lift your mark. Learn the patterns and practise them against the clock, marking every attempt with the scheme.

The same habit pays off in the written papers. Our guide to the keywords examiners look for in Paper 2 applies it to Chemistry's longest paper. Good luck on 17 November.