Free OCR GCSE Chemistry A (Gateway) (J248) Exam Questions and Answers
OCR GCSE Chemistry A (Gateway) (J248) is OCR's GCSE Chemistry A (Gateway) qualification, specification J248, taken in England. It is sat at Foundation or Higher tier. The questions here come from OCR's published question papers from June 2018 to June 2025, plus its specimen papers, with answers and marking guidance taken from OCR's own mark schemes. Written-answer questions let you work out your answer and then reveal what the mark scheme accepts; diagrams, graphs and source material appear with the questions that use them.
Looking for OCR GCSE Chemistry A (Gateway) (J248) exam dumps or ExamTopics questions? These practice questions cover the same ground with verified answers and explanations, a downloadable PDF and a full practice test, kept current as OCR updates the exam.
Last updated: October 15, 2026
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Question #1
Which of these pH values shows the pH of a strong acid?
Correct answer: A
Explanation
Correct answer: A.
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Question #2
Which of these general properties correctly describes a metal?
Correct answer: A
Explanation
Correct answer: A.
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Question #3
A number of scientists contributed to the development of the atomic model. Which of these scientists discovered the electron?
Correct answer: D
Explanation
Correct answer: D.
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Question #4
This is a section of the Periodic Table. In which section of the Periodic Table would you find non-metals?
Correct answer: D
Explanation
Correct answer: D.
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Question #5
What is the typical size of the radius of an atom?
Correct answer: C
Explanation
Correct answer: C.
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Question #6
Lead nitrate contains lead ions, Pb²⁺, and nitrate ions, NO₃⁻. What is the formula for lead nitrate?
Correct answer: B
Explanation
Correct answer: B.
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Question #7
Look at the equation. CH₄ + 2O₂ → CO₂ + 2H₂O Which substance is oxidised in this reaction?
Correct answer: A
Explanation
Correct answer: A.
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Question #8
Look at the equation. CH₄ + 2O₂ → CO₂ + 2H₂O Which substance is the oxidising agent in this reaction?
Correct answer: D
Explanation
Correct answer: D.
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Question #9
Which statement about covalent bonding is true?
Correct answer: C
Explanation
Correct answer: C.
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Question #10
The electronic structure of an atom of an element is 2.8.8.2. In which period of the Periodic Table is this element found?
Correct answer: C
Explanation
Correct answer: C.
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