Oxford Cambridge and RSA - Monday 29 November 2021 - Morning GCSE (9–1) Chemistry A (Gateway Science) J248/04 Paper 4 (Higher Tier)

Sep 5, 2026

GCSE (9–1) Chemistry A (Gateway Science) Paper 4 (Higher Tier) from Oxford Cambridge and RSA sets out exam instructions, marking information and guidance for answering. Section A contains multiple-choice questions covering key chemistry topics including hydrocarbons and intermolecular forces, reaction rate factors, early Earth atmosphere gases, the Haber process conditions, percentage yield, rusting reactions, solution concentration and conversions, functional groups, redox half-equations, metal extraction methods, and polymer/ester formation and equilibrium catalysts. It also includes a question comparing batch and continuous fertiliser production processes.

LanguageEnglish

CategoryExam

FormatPDF

Pages32

Reading Time1 h 21 min

AccessFree to download

Section A: Answer all the questions

Multiple-choice questions (1–15)

Oxford Cambridge and RSA Monday 29 November 2021 – Morning GCSE (9–1) Chemistry A (Gateway Science) J248/04 Paper 4 (Higher Tier) Time allowed: 1 hour 45 minutes H *8341157300* You must have: • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Chemistry A (inside this document) You can use: • a scientific or graphical calculator • an HB pencil | Please write clearly in black ink. Do not write in the barcodes. | | | | | --- | --- | --- | --- | | Centre number | | Candidate number | | | First name(s)
Last name | | | | INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for a correct method, even if the answer is wrong. INFORMATION • The total mark for this paper is 90. • The marks for each question are shown in brackets [ ] . • Quality of extended response will be assessed in questions marked with an asterisk (*) . • This document has 32 pages. ADVICE • Read each question carefully before you start your answer. © OCR 2021 [601/8663/X] DC (ST/CB) 300823/8 OCR is an exempt Charity Turn over 2 SECTION A Answer all the questions. You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. 1 Butane is a hydrocarbon molecule with a low boiling point. Which statement about butane is correct? A Butane is a large molecule and has strong intermolecular forces. B Butane is a large molecule and has weak intermolecular forces. C Butane is a small molecule and has strong intermolecular forces. D Butane is a small molecule and has weak intermolecular forces. Your answer [1] 2 Lumps of zinc react with dilute sulfuric acid. What change would decrease the rate of this reaction? A Further diluting the sulfuric acid with water. B Using a larger volume of sulfuric acid. C Using warmer sulfuric acid. D Using zinc powder instead of zinc lumps. Your answer [1] 3 3 The Earth’s early atmosphere formed 4.5 billion years ago. Which process produced the gases in the Earth’s early atmosphere? A Combustion B Condensation C Photosynthesis D Volcanic activity Your answer [1] 4 What are the conditions usually used for the production of ammonia in the Haber process? N2 + 3H2 2NH3 A 200 °C, 450 atmospheres pressure and an iron catalyst B 450 °C, 2 atmospheres pressure and a vanadium(V) oxide catalyst C 450 °C, 200 atmospheres pressure and an iron catalyst D 450 °C, 200 atmospheres pressure and a nickel catalyst Your answer [1] 5 A scientist predicts that they should make 96 tonnes of product in a reaction. They only actually make 81 tonnes of product. What is the percentage yield? A 15% B 19% C 84% D 119% Your answer [1] © OCR 2021 Turn over 4 6 When iron rusts it forms hydrated iron(III) oxide. 4Fe + 3O2 2Fe2O3 What happens to iron in this reaction? A Iron is decomposed. B Iron is neutralised. C Iron is oxidised. D Iron is reduced. Your answer [1] 7 The concentration of a solution of sodium hydroxide, NaOH, is 0.725 mol / dm3. What is the concentration of this solution in g / dm3? (The relative atomic mass, Ar , of H is 1.0, of Na is 23.0 and of O is 16.0) . A 0.018 g / dm3 B 29.0 g / dm3 C 55.2 g / dm3 D 725.0 g / dm3 Your answer [1] 8 What is the formula of the functional group in carboxylic acids? A –C=C– B –COOH C –CO2 D –OH Your answer [1] 5 9 What is the balanced half equation for the formation of bromine from bromide ions? A Br– – e– Br B Br– Br – e– C 2Br– – 2e– Br2 D 2Br– Br2 – 2e– Your answer [1] 10 Metals can be extracted by biological methods. Plan

FAQs

What documents and equipment are required for this chemistry exam paper?

You must have a ruler (cm/mm) and the Data Sheet for GCSE (9–1) Chemistry A. You may use a scientific or graphical calculator and an HB pencil for graphs and diagrams.

How long should students spend on Section A?

A maximum of 30 minutes should be spent on Section A.

What is the total mark and how are marks awarded on the paper?

The total mark for the paper is 90. Marks for each question are shown in brackets, and working may receive marks even if the final answer is wrong.

Sep 5, 2026

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