A student investigates how the temperature of sodium thiosulfate solution affects the time taken for a mark X under the conical flask to disappear. Which is the manipulated variable?
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SPM Chemistry4541
2 papers140 marks3 h 45 min
What we predict comes up
From the syllabus weighting and how the papers are usually set. The papers below follow it.
- Acids, bases and salts18%The largest Form 4 topic: concentration, titration, salt preparation and qualitative analysis, often as the Section C problem.
- Manufactured substances, polymers and consumer chemistry15%Alloys, the Haber and Contact processes, polymers, rubber, soap and detergents together carry two Section A questions.
- Thermochemistry11%Heat of neutralisation, displacement and combustion with an energy calculation is a reliable 10 to 12 mark question.
- Redox equilibrium10%The heaviest Form 5 chapter: oxidation numbers, electrolysis, voltaic cells and rusting, often as a Section B choice.
Paper 1
1 h 15 min · 40 marks · Calculator allowed
- This question paper consists of 40 questions.
- Answer all questions.
- Each question is followed by four options, A, B, C and D. Choose one answer for each question.
- Each question carries one mark.
- You may use a scientific calculator.
Answer or mark a question and your score adds up here.
Answer all questions40 marks
The nucleon number of an atom of element X is 27 and its proton number is 13. How many neutrons are there in the nucleus of an atom of X?
Solid naphthalene is heated. Its temperature stays constant at 80 °C until all of it has melted. Why does the temperature stay constant?
37 more questions
Every paper, every question, the answers and the mark scheme. Free with a Knomi account.
Not included: Practical work is not included: in the KSSM format SPM Chemistry has no written Paper 3, and practical skills are assessed by the school through the Pentaksiran Kerja Amali.