Q1 · Difficulty 1/3
Two or more elements chemically bonded together form a:
- compound
- mixture
- isotope
- solution only
Show answer & explanation
✓ Answer: A — compound
A compound is elements chemically joined.
OCR · GCSE · Chemistry
Free OCR GCSE Chemistry
Practice Paper
8 mixed-difficulty practice questions in the style of real OCR GCSE papers — answers, mark-scheme-style explanations, and the official exam structure all on one page.
Take a Mini Mock →What the real OCR GCSE Chemistry paper looks like
Paper 1
Approximately 1 hour 30 minutes, ~70-100 marks. Covers Topics 1-4 of the specification.
Paper 2
Approximately 1 hour 30 minutes, ~70-100 marks. Covers Topics 5-8 of the specification.
Paper 3
Where applicable — e.g. Combined Science, Languages. Includes synoptic and applied questions.
Total exam time: ~3 hours across two or three papers.
Grading: Grades: 9 (highest) to 1 (lowest), with U (ungraded). A grade of 4 is a standard pass; 5 is a strong pass.
Grading: Grades: 9 (highest) to 1 (lowest), with U (ungraded). A grade of 4 is a standard pass; 5 is a strong pass.
Mini practice paper: 8 questions
Mixed-difficulty questions from across the Chemistry syllabus. Tap "Show answer" after each to check yourself.
Q2 · Difficulty 1/3
The smallest particle of an element that can exist is an:
- atom
- molecule
- ion
- electron
Show answer & explanation
✓ Answer: A — atom
An atom is the smallest particle of an element.
Q3 · Difficulty 1/3
Air is best described as a:
- mixture
- compound
- element
- pure substance
Show answer & explanation
✓ Answer: A — mixture
Air is a mixture of gases.
Q4 · Difficulty 2/3
The gas produced when a reactive metal reacts with water is:
- hydrogen
- oxygen
- carbon dioxide
- nitrogen
Show answer & explanation
✓ Answer: A — hydrogen
Reactive metals + water → metal hydroxide + hydrogen.
Q5 · Difficulty 2/3
A reaction that gives out heat to the surroundings is:
- neutralisation only
- exothermic
- endothermic
- reversible
Show answer & explanation
✓ Answer: B — exothermic
Exothermic reactions release heat.
Q6 · Difficulty 2/3
The test for hydrogen gas is a:
- glowing splint relights
- limewater turns milky
- damp litmus bleaches
- lit splint gives a squeaky pop
Show answer & explanation
✓ Answer: D — lit splint gives a squeaky pop
Hydrogen gives a squeaky pop with a lit splint.
Q7 · Difficulty 2/3
Reactivity of the halogens (Group 7) decreases as you go:
- up the group
- across the period
- in no pattern
- down the group
Show answer & explanation
✓ Answer: D — down the group
Halogen reactivity decreases down the group.
Q8 · Difficulty 1/3
The unit for the amount of a substance in chemistry is the:
- gram
- litre
- newton
- mole
Show answer & explanation
✓ Answer: D — mole
Amount of substance is measured in moles.
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OCR GCSE Chemistry FAQ
What does the OCR GCSE Chemistry exam look like?
The OCR GCSE Chemistry exam is structured across 3 components. Paper 1: Approximately 1 hour 30 minutes, ~70-100 marks. Covers Topics 1-4 of the specification. Paper 2: Approximately 1 hour 30 minutes, ~70-100 marks. Covers Topics 5-8 of the specification. Paper 3: Where applicable — e.g. Combined Science, Languages. Includes synoptic and applied questions. Total exam time: ~3 hours across two or three papers.
Can I download a free OCR GCSE Chemistry past paper?
Real OCR past papers are published directly by OCR 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 OCR GCSE Chemistry graded?
Grades: 9 (highest) to 1 (lowest), with U (ungraded). A grade of 4 is a standard pass; 5 is a strong pass. 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.