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OCR 2024 GCSE Combined Science A (Gateway Science) J250/10 Chemistry (Higher Tier) With Marking Scheme Merged
OCR 2024 GCSE Combined Science A (Gateway Science) J250/10 Chemistry (Higher Tier) With Marking Scheme Merged COMBINED SCIENCE A Oxford Cambridge and RSA Tuesday 11 June 2024 – Morning GCSE (9–1) Combined Science A (Gateway Science) J250/10 Chemistry (Higher Tier) Time allowed: 1 hour 10 minutes You must have: H • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Combined Science A (Chemistry) (inside this document) You can use: • a scientific or graphical calculator • an HB pencil * J 2 5 0 1 0 * Please write clearly in black ink. Do not write in the barcodes. Centre number First name(s) Last name INSTRUCTIONS Candidate number • 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 using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 60. • 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 20 pages. ADVICE • Read each question carefully before you start your answer. 2 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Carbon reacts with copper oxide to produce copper. copper oxide + carbon copper + carbon dioxide What is the role of the carbon? A It is a catalyst. B It neutralises the copper oxide. C It oxidises the copper oxide. D It reduces the copper oxide. Your answer 2 A teacher investigates some reactions of chlorine. Why is it important that the teacher does not breathe in chlorine? A Chlorine is highly flammable. B Chlorine is inert. C Chlorine is strongly alkaline. D Chlorine is toxic. Your answer 3 Where do scientists think that the oxygen in the Earth’s atmosphere came from? A Earthquakes B Green plants C Thunderstorms D Volcanic activity Your answer [1] [1] [1] © OCR 2024 3 4 Which of the catalysts is an example of an enzyme?
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medical and dental admission test past papers biology, physics, chemistry and english compiled
£62.50 Preview RemoveOCR AS Chemistry Quick Revision Cards
Quick and Concise notes for the OCR Chemistry AS Spectrum, good for testing and general revision
£2.50 Preview RemoveThread of Life OCR B A2 F334
These are detailed notes produced for the OCR B chemistry A2 salters course. These notes work through each specification point in detail using storyline, chemical ideas and the revision guide, answering each question and giving diagrams and explanations on how to carry out necessary calculations. The breadth of these notes makes them suitable for students at any grade in A2.
£3.13 Preview RemoveWorksheet for learning Pyruvate Dehydrogenase Process
Notes are designed for a student in an advanced biochemistry course who is trying to learn the Pyruvate Dehydrogenase Complex in detail. This Worksheet has a fill in the blank format for structures and words.
£1.25 Preview RemovePharmaceutical Organic Chemistry
Pharmaceutical Organic Chemistry Questions and answers helpful for reviews and board exams.
£33.75 Preview RemoveIV. Mutagenesis
BIOCHEMISTRY (2nd year) This covers mutagenesis, broken into two parts Part A covers point mutation (spontaneous DNA damage, base mispairing, UV irradiation, chemical mutagens, alkylating agents) and Part B covers insertion or deletions related to MCB2021F This is a biochemistry course taught at UCT follows the textbook - Biochemistry, Garrett & Grisham
£1.50 Preview RemoveGCSE Biology B1 Paper 1 Notes Summarised
GCSE AQA Biology Paper 1 Revision Notes. These are the notes that took me from a 4(C) to a 7(A) in less than two months. I’ve summarised the textbook version into just a paragraph for each chapter/section. Use these notes and turn them into revision cards or a mind map. They’re handwritten and I suggest when revising you hand write the things because that’s what really helped me. They cover everything you need to know in Topics 1-5 in a simplified version. The contents are the poster and also handwritten notes (24 pages) Condition is New. I’ve scanned them as documents so I’ll be able to email as soon as you’ve purchased :)
£3.74 Preview RemoveEthers Brief Questions and Answers
The word ether is derived from Greek word aither meaning the clear sky or air; it represents the airy or volatile nature of typical compounds of this class. Ethers are the compounds having the general formula R – O – R. They can be regarded as the dialkyl derivatives of water or monoalkyl derivatives of alcohols.
£2.50 Preview RemoveChemistry WJEC A level
Notes that cover the syllabus for WJEC chemistry 3 and 4.
£1.50 Preview RemoveStructural isomerism
Brief explanatory point wise notes with examples. Compact notes Types of structure isomerism Priority order How to check isomerism
£1.50 Preview RemoveMetal Complex Equilibria
Highlights - Complexation Reactions - Ligands - Coordination Number - Chelate - Soluble Complexes - Distribution of Metal Among Several Complexes - Conditional Metal-Ligand Formation Constants - Conditional or Effective Formation Constants - Competition with other ligands - Complexation Titrations - Titrations with EDTA - Indicator for EDTA Totrations - EDTA Titration Techniques - Solubility Equilibrium/Precipitation Reactions - Factors Affecting Solubility - Precipitation Titration
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The fundamental concepts of inorganic chemistry including the physical and chemical properties of matter, atomic structure, chemical bonding, stoichiometry, the gas laws, solutions, acids and bases, redox reactions, and chemical equilibria. The laboratory includes an experimental study of the chemical principles
£3.75 Preview RemoveValence Bond Theory and Molecular Orbital Theory
Second year university organic chemistry explanation of the difference between valence bond theory and molecular orbital theory. An explanation of which one is better for which cases, and why one is better than the next.
£1.00 Preview RemoveConjunctivitis- OSCE/EXAM material
Excellent set of notes to help you get a first for OSCE's during your pharmacy degree. OSCE's are worth many marks and a good set of notes are essential. Why waste time making your own?
£6.25 Preview RemoveEntropy and free energy or enthalpy
Entropy and free energy or enthalpy and their relationship
£2.50 Preview RemoveSOLUTIONS (CONC TERMS + COLLIGATIVE PROPERTY) ONE PAGE NOTES
a handwritten one-page last-minute revision notes document on the Solutions chapter, focusing on concentration terms and colligative properties. This document likely includes key concepts such as molarity, molality, mole fraction, and detailed explanations of colligative properties like boiling point elevation, freezing point depression, osmotic pressure, and vapor pressure lowering. Packed with tricks and mnemonic devices for quick recall, this concise guide is designed to make complex topics easier to understand. With its clear structure and practical tips, it's a valuable resource, definitely worth the money for those seeking efficient revision.
£2.50 Preview RemoveFarmacocinetica
Actividad de los medicamentos en el cuerpo durante un período de tiempo
£12.50 Preview RemoveEnzyme inhibition and regulation
These are very good notes on enzymes for anyone pursuing a Bachelor's Degree in Biochemistry or Biology. I use these notes to lecture Biochemistry at the University of Zambia
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Once you read me you understand everything. The shorter I am the more informative I could br
£12.50 Preview RemoveENZYMES
These notes give detail explanations about Enzymes The notes are very enriching and are very good for sciences students at the undergraduate and graduate levels and also good for medical students
£4.38 Preview RemoveThermodynamics (Biological Chemistry)
Used for 1st year exam at University of Liverpool (Life Sciences dept). Includes enthalpy, heat capacity, entropy, free energy, and equilibria and chemical reactions.
£2.50 Preview RemoveBasic concept of organic chemistry by shani
In these notes there is a brief discussion of organic chemistry
£0.50 Preview RemoveIntroduction to Neuroscience
Cells of the Nervous System, Neuroglial Cells, Neural Circuits, Organization of the Human Nervous System
£3.75 Preview RemoveBasics of naming chemical compounds
This notes covers all the basics of naming chemical compound. I hope you will learn a lot from it.
£6.25 Preview RemoveDeck of organic reactions
List of organic reactions and mechanisms suitable for A-level Chemistry. The deck covers chapter alkene, alcohol, benzene, haloalkane, amines and carbonyl compound
£3.75 Preview Removescience notes
Science is the systematic study of the natural world through observation and experimentation. It has revolutionized human life by providing solutions to countless problems and enhancing our understanding of the universe. From the discovery of gravity by Newton to the theory of relativity by Einstein, science has opened doors to new possibilities and technologies. One of the greatest contributions of science is in the field of medicine. It has helped in diagnosing and curing diseases, improving health care, and increasing life expectancy. In communication, scientific advancements have made the world a global village through the internet, smartphones, and satellites. Transportation has become faster and safer due to scientific inventions like cars, trains, and airplanes. Science also plays a vital role in agriculture by increasing crop yield, improving irrigation, and developing pest-resistant seeds. Moreover, it helps us understand and tackle environmental issues such as climate change and pollution. However, science must be used responsibly. While it offers great benefits, misuse can lead to destruction, such as nuclear weapons and environmental harm. In conclusion, science is a powerful tool that, when used wisely, can lead to a better and more advanced world for future generations.
£12.50 Preview RemoveCarbohydrate notes
essential carbohydrate study notes used for first year bachelor of Biomedical science at Queensland University of Technology. Basic foundation for anyone studying or wanting to study biology or medicine at university.
£2.50 Preview RemoveGROUP 18 NOBLE GASES ONE PAGE NOTES FOR LAST MIN REVISION
Group 18 Elements - One-Page Revision Notes This concise document provides a quick and comprehensive summary of the Group 18 elements (Noble Gases) from the periodic table, ideal for last-minute revision. It covers essential information including their electronic configuration, physical and chemical properties, occurrence, uses, and trends in reactivity. The notes are structured for easy understanding and memorization, making them perfect for NEET aspirants and chemistry students looking for an efficient review tool.
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