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OCR 2023 GCSE Combined Science Chemistry A Gateway Science J250/09: Paper 9 (Higher Tier) Question Paper & Mark Scheme (Merged)
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2 © OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which substance is described as pure by a scientist? A A solution of sodium chloride B An alloy C Dilute sulfuric acid D Distilled water Your answer ...
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