Kramizo
Log inSign up free
Home › CXC CSEC Chemistry › Practice Paper
CXC · CSEC · Chemistry

Free CXC CSEC Chemistry
Practice Paper

8 mixed-difficulty practice questions in the style of real CXC CSEC papers — answers, mark-scheme-style explanations, and the official exam structure all on one page.

Take a Mini Mock →

What the real CXC CSEC Chemistry paper looks like

Paper 1 (Section A)
60 multiple-choice questions, 1 mark each. 75 minutes. Tests knowledge across the whole syllabus.
Paper 2
Structured short-answer + 1 extended response question. Section A is compulsory; Section B has a choice. Approximately 2 hours 10 minutes.
School-Based Assessment (SBA)
Coursework component graded by the teacher, externally moderated. Worth ~20-30% of the final grade depending on subject.
Total exam time: ~3.5 hours across Paper 1 and Paper 2 sittings.
Grading: Grades: I (highest) to VI (lowest). A grade of III or above is typically required for further study.

Mini practice paper: 8 questions

Mixed-difficulty questions from across the Chemistry syllabus. Tap "Show answer" after each to check yourself.

Q1 · Difficulty 1/3

A naturally occurring rock from which a metal is extracted is an:

  1. alloy
  2. ore
  3. acid
  4. salt
Show answer & explanation
✓ Answer: B — ore
An ore contains the metal.
Q2 · Difficulty 1/3

Ethene reacts with hydrogen gas in the presence of a nickel catalyst. What is the product of this reaction?

  1. Ethanol
  2. Methane
  3. Ethane
  4. Propane
Show answer & explanation
✓ Answer: C — Ethane
When ethene (CH₂=CH₂) undergoes hydrogenation with H₂ and a nickel catalyst, hydrogen adds across the double bond to form ethane (CH₃CH₃). This is an addition reaction. The catalyst lowers the activation energy but is not consumed in the reaction.
Q3 · Difficulty 1/3

Which indicator turns red in acid and blue in alkali?

  1. Phenolphthalein
  2. Litmus
  3. Methyl orange
  4. Universal indicator
Show answer & explanation
✓ Answer: B — Litmus
Litmus is red in acidic solutions and blue in alkaline solutions. It is one of the simplest indicators.
Q4 · Difficulty 1/3

What is the name of the salt formed when hydrochloric acid reacts with sodium hydroxide?

  1. Sodium chloride
  2. Sodium carbonate
  3. Sodium nitrate
  4. Sodium sulfate
Show answer & explanation
✓ Answer: A — Sodium chloride
HCl + NaOH → NaCl + H₂O. The salt formed is sodium chloride (common table salt).
Q5 · Difficulty 1/3

What is produced when an acid reacts with a base?

  1. Acid and hydrogen
  2. Salt and water
  3. Metal and oxygen
  4. Gas and precipitate
Show answer & explanation
✓ Answer: B — Salt and water
Acid + base → salt + water. This is a neutralisation reaction. The H⁺ ions from the acid combine with OH⁻ ions from the base.
Q6 · Difficulty 1/3

Particles in a solid are:

  1. randomly fast
  2. absent
  3. far apart
  4. closely packed and vibrating
Show answer & explanation
✓ Answer: D — closely packed and vibrating
Solids: packed, vibrating.
Q7 · Difficulty 1/3

A student in a Jamaican school laboratory wants to obtain pure water from a sample of sea water collected from Kingston Harbour. Which separation technique would be MOST suitable?

  1. Decanting
  2. Filtration
  3. Simple distillation
  4. Evaporation
Show answer & explanation
✓ Answer: C — Simple distillation
Award 1 mark for identifying distillation as the method to obtain pure water from a solution. B is incorrect — filtration separates insoluble solids from liquids, not dissolved salts. D is incorrect — evaporation would leave salt behind but the water would be lost as vapour. A is incorrect — decanting separates immiscible liquids or liquids from settled solids.
Q8 · Difficulty 1/3

What products are formed from the complete combustion of a hydrocarbon?

  1. Carbon dioxide and water
  2. Carbon monoxide and hydrogen
  3. Soot and steam
  4. Carbon and water
Show answer & explanation
✓ Answer: A — Carbon dioxide and water
Complete combustion (plenty of oxygen): hydrocarbon + O₂ → CO₂ + H₂O. Incomplete combustion produces carbon monoxide and/or soot.
Build a 30-question timed mock →
Free · No signup · Instant marking

CXC CSEC Chemistry FAQ

What does the CXC CSEC Chemistry exam look like?
The CXC CSEC Chemistry exam is structured across 3 components. Paper 1 (Section A): 60 multiple-choice questions, 1 mark each. 75 minutes. Tests knowledge across the whole syllabus. Paper 2: Structured short-answer + 1 extended response question. Section A is compulsory; Section B has a choice. Approximately 2 hours 10 minutes. School-Based Assessment (SBA): Coursework component graded by the teacher, externally moderated. Worth ~20-30% of the final grade depending on subject. Total exam time: ~3.5 hours across Paper 1 and Paper 2 sittings.
Can I download a free CXC CSEC Chemistry past paper?
Real CXC past papers are published directly by CXC on their official website. Kramizo doesn't redistribute copyrighted past papers, but we do generate free AI-written practice papers in the exact same style — same command words, same difficulty tier, same mark conventions. Use this practice paper as warm-up, then time yourself on official past papers before exam day.
How is CXC CSEC Chemistry graded?
Grades: I (highest) to VI (lowest). A grade of III or above is typically required for further study. Kramizo's practice questions are tagged with difficulty 1-3 mapping roughly to the lower, middle, and top grade boundaries you'll encounter in the real exam.