This document contains a chemistry exam paper with multiple questions about fuels and hydrocarbons. The questions cover topics such as combustion reactions of hydrocarbons, cracking of alkanes, acid rain formation from fossil fuel combustion, homologous series of hydrocarbons and carboxylic acids, and the formation of fossil fuels. The document tests understanding of fundamental organic chemistry concepts as well as the environmental impacts of burning fossil fuels.
This document contains information about alkenes from multiple chemistry question papers. It discusses topics such as:
- Industrial processes used to produce alkenes from petroleum.
- Polymerization of ethene and propene to form polymers.
- Reactions of alkenes to form esters, alcohols, and other products.
- Cracking of alkanes to produce alkenes.
- Addition reactions of alkenes and their use in making pesticides, polymers, and other compounds.
- Oxidation of alkenes to form carboxylic acids.
The document contains chemistry questions and problems relating to alkene structures, reactions, and properties over
This document contains a 5-question stoichiometry exam with multiple parts to each question. The exam covers topics such as the law of constant composition, reduction and oxidation reactions, empirical and molecular formulas, limiting reagents, and balanced chemical equations. Students are asked to perform stoichiometric calculations, identify limiting reagents, write balanced equations, and determine empirical formulas from percentage compositions.
This document is a chemistry exam paper assessing knowledge of acids, bases and salts. It contains multiple choice and written response questions testing understanding of:
- Preparing soluble salts from insoluble bases and acids
- Properties of strong and weak acids
- Reactions of acids with metals, bases, carbonates and other salts
- Acid-base theories including proton transfer and pH
- Methods of salt preparation and properties of common oxides
This document contains information about acids, bases and salts. It includes questions about determining the reactivity series of metals through displacement reactions and measuring cell voltages. It also discusses properties of specific acids like malonic acid and sulfuric acid, and preparation of salts through various methods like precipitation, neutralization and titration. Example reactions provided include the reaction of magnesium with acids, and the reaction of ethylamine with iron(III) chloride that forms a brown precipitate.
The document is a chemistry exam paper testing students' ability to identify ions and gases through laboratory tests. It describes tests carried out on various solid and liquid samples and asks students to identify the substances, describe observations, and draw conclusions. The paper tests knowledge of common chemical tests including flame tests, reactions of salts with acids and bases, and precipitation reactions to identify anion groups present. Students must analyze the provided data and apply their understanding of chemical reactions and properties to deduce the identities and nature of the unknown samples.
This document consists of exam questions for a chemistry International General Certificate of Secondary Education covering topics such as laboratory equipment, the periodic table, chemical reactions, and organic compounds. Students are to answer questions that involve labelling diagrams, completing equations, describing observations, calculating values, and explaining chemical concepts. The exam is designed to test students' understanding of essential chemistry principles and their ability to apply that knowledge.
This document provides instructions and questions for an International General Certificate of Secondary Education chemistry exam, including diagrams of laboratory glassware, questions about chemical reactions and compounds, and a periodic table. Students are to answer multiple choice and short answer questions testing their knowledge of chemistry concepts and complete calculations. The exam covers topics such as laboratory equipment, properties of metals, acid-base reactions, and hydrocarbon fuels.
The document is a chemistry exam paper containing multiple questions on topics related to electricity and chemistry. It includes questions about the extraction of zinc from zinc blende, the purification of zinc by electrolysis, corrosion of steel and its prevention, the extraction of iron in the blast furnace, and catalysts in chemical reactions. The questions require students to write word and ionic equations, explain observations, complete descriptions, and suggest explanations.
This document contains information about alkenes from multiple chemistry question papers. It discusses topics such as:
- Industrial processes used to produce alkenes from petroleum.
- Polymerization of ethene and propene to form polymers.
- Reactions of alkenes to form esters, alcohols, and other products.
- Cracking of alkanes to produce alkenes.
- Addition reactions of alkenes and their use in making pesticides, polymers, and other compounds.
- Oxidation of alkenes to form carboxylic acids.
The document contains chemistry questions and problems relating to alkene structures, reactions, and properties over
This document contains a 5-question stoichiometry exam with multiple parts to each question. The exam covers topics such as the law of constant composition, reduction and oxidation reactions, empirical and molecular formulas, limiting reagents, and balanced chemical equations. Students are asked to perform stoichiometric calculations, identify limiting reagents, write balanced equations, and determine empirical formulas from percentage compositions.
This document is a chemistry exam paper assessing knowledge of acids, bases and salts. It contains multiple choice and written response questions testing understanding of:
- Preparing soluble salts from insoluble bases and acids
- Properties of strong and weak acids
- Reactions of acids with metals, bases, carbonates and other salts
- Acid-base theories including proton transfer and pH
- Methods of salt preparation and properties of common oxides
This document contains information about acids, bases and salts. It includes questions about determining the reactivity series of metals through displacement reactions and measuring cell voltages. It also discusses properties of specific acids like malonic acid and sulfuric acid, and preparation of salts through various methods like precipitation, neutralization and titration. Example reactions provided include the reaction of magnesium with acids, and the reaction of ethylamine with iron(III) chloride that forms a brown precipitate.
The document is a chemistry exam paper testing students' ability to identify ions and gases through laboratory tests. It describes tests carried out on various solid and liquid samples and asks students to identify the substances, describe observations, and draw conclusions. The paper tests knowledge of common chemical tests including flame tests, reactions of salts with acids and bases, and precipitation reactions to identify anion groups present. Students must analyze the provided data and apply their understanding of chemical reactions and properties to deduce the identities and nature of the unknown samples.
This document consists of exam questions for a chemistry International General Certificate of Secondary Education covering topics such as laboratory equipment, the periodic table, chemical reactions, and organic compounds. Students are to answer questions that involve labelling diagrams, completing equations, describing observations, calculating values, and explaining chemical concepts. The exam is designed to test students' understanding of essential chemistry principles and their ability to apply that knowledge.
This document provides instructions and questions for an International General Certificate of Secondary Education chemistry exam, including diagrams of laboratory glassware, questions about chemical reactions and compounds, and a periodic table. Students are to answer multiple choice and short answer questions testing their knowledge of chemistry concepts and complete calculations. The exam covers topics such as laboratory equipment, properties of metals, acid-base reactions, and hydrocarbon fuels.
The document is a chemistry exam paper containing multiple questions on topics related to electricity and chemistry. It includes questions about the extraction of zinc from zinc blende, the purification of zinc by electrolysis, corrosion of steel and its prevention, the extraction of iron in the blast furnace, and catalysts in chemical reactions. The questions require students to write word and ionic equations, explain observations, complete descriptions, and suggest explanations.
This document contains a 6-part stoichiometry exam with multiple choice and written response questions. The exam covers topics such as the law of constant composition, balancing chemical equations, empirical and molecular formulas, limiting reagents, percentage yield calculations, and methods for preparing different types of salts.
This document is a chemistry exam paper containing multiple choice and short answer questions testing knowledge of stoichiometry, organic chemistry, acid-base reactions, and periodicity. The paper contains 9 questions with a total of 69 marks. It tests key chemistry concepts like mole calculations, empirical and molecular formula determination, acid-base and redox reactions, and periodic trends.
This document is an exam paper for the International General Certificate of Secondary Education (IGCSE) Chemistry exam. It consists of 5 questions testing knowledge of chemistry concepts and calculations. The first question covers topics related to iron production and properties of iron and steel. The second question covers essential minerals and properties of elements like boron. The third question covers alkene hydrocarbons and their reactions. The fourth question covers nitrogen dioxide and oxides of nitrogen. The final question covers properties of elements in Period 6 of the periodic table.
The document is a chemistry exam paper that covers several topics:
1. Electroplating steel objects involves coating them first with copper then nickel then silver in a 3-step process.
2. Chemical reactions are always accompanied by an energy change. Aluminum extraction and determining metal reactivity use electrolysis.
3. Zinc production from its ore and uses in alloys and batteries are discussed. Dry cells use zinc and manganese oxide with an ammonium chloride electrolyte.
1. Alcohols form a homologous series with characteristics including similar functional groups, incremental formula differences of CH2, and a linear structure. Two alcohols shown are isomers because they have the same molecular formula but different structural formulas. Butanol can be oxidized by copper(II) oxide to form an acid in the carboxylic acid series.
2. Ethanol can be produced by yeast fermentation of glucose, which is an exothermic reaction that produces carbon dioxide. The reaction rate initially increases as yeast converts glucose but eventually decreases as reactants are depleted.
3. Esters contain the ester linkage and can be formed from alcohols and carboxylic acids
- The document is a chemistry exam paper assessing knowledge of particulate nature of matter including diffusion, Brownian motion, and properties of solids, liquids, and gases.
- It contains 5 multi-part questions testing understanding of acid-base reactions, properties of halogens, uses of selenium and sulfur, bonding in covalent compounds, and properties of ethanoic acid.
- Students must demonstrate knowledge of key concepts through written explanations, diagrams, equations, and interpreting provided data in the form of a graph.
The document is a chemistry question paper that covers several topics related to stoichiometry and the preparation and properties of salts and metals. It contains multiple questions involving calculations related to reactions between calcium carbonate and hydrochloric acid, the preparation of nickel(II) chloride and potassium chloride salts, and the isolation of titanium from its ore. The questions assess understanding of reaction rates and stoichiometry, acid-base reactions, precipitation reactions, and the properties and uses of transition metals.
The document contains a 9 question exam paper assessing knowledge of the periodic table and properties of group 1 metals, transition metals such as vanadium, and elements in period 2 such as carbon, nitrogen, fluorine and neon. Questions cover trends in physical and chemical properties, electronic configurations, oxidation states, bonding and structures.
The document is a chemistry exam paper containing multiple questions about nitrogen, fertilizers, and the Haber process. It includes:
- Questions about distinguishing between ammonium phosphate and calcium dihydrogenphosphate fertilizers through a chemical test.
- A question requiring a description of how ammonia is made through the Haber process, including the essential conditions and reaction equation.
- Further questions about the raw materials, catalyst, and uses of ammonia in the Haber process, and how changing temperature and pressure affects the reaction equilibrium.
This document consists of a 12-page chemistry exam for the International General Certificate of Secondary Education. The exam contains multiple choice and short answer questions testing knowledge of topics including the isolation of iron, alkene reactions, nitrogen dioxide, properties of Group 1 and 2 metals on the periodic table, and alkene polymerization. Diagrams and equations are included. A periodic table is provided on the final page.
This document consists of a 12-page chemistry exam for the International General Certificate of Secondary Education. The exam contains multiple choice and short answer questions testing knowledge of concepts including the isolation of iron, production of steel, properties and reactions of alkenes and alkynes, nitrogen dioxide, group 1 and 2 metals on the periodic table, and more. Diagrams, equations, and explanations are required to fully answer the questions.
This document is a 12-page exam for the International General Certificate of Secondary Education in Chemistry. It contains multiple choice and free response questions covering topics like iron production, calcium and mineral supplements, alkene reactions, and nitrogen dioxide. Students are instructed to write their identifying information, show all work, and answer all questions in the spaces provided on the exam pages.
This document consists of a chemistry exam paper with multiple choice and short answer questions testing knowledge of chemistry concepts and principles. It includes questions on the periodic table, chemical reactions, states of matter, chemical bonding, and properties and reactions of various elements and compounds. The paper provides context for summarizing key chemistry ideas assessed on the exam.
This document contains a chemistry question paper with multiple parts testing knowledge of stoichiometry, thermochemical reactions, properties of elements and compounds, and reactions of sulfur compounds. The paper includes questions involving mole calculations, identifying products of reactions when substances are heated, describing physical properties and structures of macromolecular substances, writing balanced equations and describing conditions for industrial reactions.
This document provides instructions for a chemistry exam. It outlines that candidates have 1 hour and 15 minutes to complete the exam. They should write their identifying information in the spaces provided. The exam consists of 12 printed pages and candidates should answer all questions in the spaces on the paper. No additional materials are allowed.
This document appears to be an exam for the subject of chemistry, consisting of multiple choice and short answer questions covering various topics in chemistry including the periodic table, chemical reactions, states of matter, and properties of metals. The exam provides a periodic table, questions to be answered on the exam paper provided, and is 16 pages in length.
This document appears to be an exam paper for chemistry. It consists of multiple choice and short answer questions testing knowledge of chemistry concepts including the periodic table, chemical reactions, states of matter, and experimental procedures. The questions cover topics such as identifying elements on the periodic table, writing balanced chemical equations, describing phase changes and molecular motion, naming compounds, and explaining laboratory techniques.
This document appears to be an exam paper for chemistry. It consists of multiple choice and short answer questions testing knowledge of chemistry concepts including the periodic table, chemical reactions, states of matter, and experimental procedures. The questions cover topics such as identifying elements on the periodic table, writing balanced chemical equations, describing phase changes and molecular motion, naming compounds, and explaining laboratory techniques.
AQA AS Chemistry Atomic Structure QuestionsGodschild24
This document contains sample chemistry problems and questions regarding various topics:
1) Using the ideal gas equation to calculate the volume of ethanol vapor under certain pressure and temperature conditions.
2) Balancing a chemical equation and calculating moles of a substance produced.
3) Calculating the maximum mass of a product formed from a given mass of a reactant over two reaction stages.
4) Stating the relative charge and mass of an electron, identifying properties of chromium isotopes, and explaining mass spectrometry.
5) Calculating an empirical formula from elemental composition percentages.
This document is a 17-page chemistry exam consisting of multiple choice and short answer questions covering topics like purification methods, petroleum fractions, limestone thermal decomposition, bromine extraction, and aluminum electrolysis. It includes a 3-page periodic table and some blank pages. Students are to answer all questions directly on the exam paper using a dark pen or pencil and without other materials.
This document contains information about four experiments conducted to investigate the rate of reaction between solutions J and K and sulfuric acid at different temperatures. The key details are:
- Experiment 1 was conducted at room temperature and used as the baseline. Experiments 2-4 heated the mixture to increasing temperatures before adding solution K.
- The time taken for the mixtures to turn pale yellow was recorded.
- A line graph of time vs average temperature showed the rate of reaction increased with increasing temperature.
- Extrapolating the graph indicated a temperature of 60°C would yield a reaction time of around 15 seconds.
This document is a chemistry exam question paper that tests students' knowledge of types of oxides. It contains 16 multiple choice questions about classifying elements based on whether their oxides are acidic or basic, identifying properties of acidic and basic oxides, and predicting reactions of oxides with acids and bases. The questions cover topics like the positions of elements in the periodic table that relate to the acidity or basicity of their oxides, and common reactions of oxides like neutralization. The document also provides the grade boundaries for scoring the exam.
This document contains a 6-part stoichiometry exam with multiple choice and written response questions. The exam covers topics such as the law of constant composition, balancing chemical equations, empirical and molecular formulas, limiting reagents, percentage yield calculations, and methods for preparing different types of salts.
This document is a chemistry exam paper containing multiple choice and short answer questions testing knowledge of stoichiometry, organic chemistry, acid-base reactions, and periodicity. The paper contains 9 questions with a total of 69 marks. It tests key chemistry concepts like mole calculations, empirical and molecular formula determination, acid-base and redox reactions, and periodic trends.
This document is an exam paper for the International General Certificate of Secondary Education (IGCSE) Chemistry exam. It consists of 5 questions testing knowledge of chemistry concepts and calculations. The first question covers topics related to iron production and properties of iron and steel. The second question covers essential minerals and properties of elements like boron. The third question covers alkene hydrocarbons and their reactions. The fourth question covers nitrogen dioxide and oxides of nitrogen. The final question covers properties of elements in Period 6 of the periodic table.
The document is a chemistry exam paper that covers several topics:
1. Electroplating steel objects involves coating them first with copper then nickel then silver in a 3-step process.
2. Chemical reactions are always accompanied by an energy change. Aluminum extraction and determining metal reactivity use electrolysis.
3. Zinc production from its ore and uses in alloys and batteries are discussed. Dry cells use zinc and manganese oxide with an ammonium chloride electrolyte.
1. Alcohols form a homologous series with characteristics including similar functional groups, incremental formula differences of CH2, and a linear structure. Two alcohols shown are isomers because they have the same molecular formula but different structural formulas. Butanol can be oxidized by copper(II) oxide to form an acid in the carboxylic acid series.
2. Ethanol can be produced by yeast fermentation of glucose, which is an exothermic reaction that produces carbon dioxide. The reaction rate initially increases as yeast converts glucose but eventually decreases as reactants are depleted.
3. Esters contain the ester linkage and can be formed from alcohols and carboxylic acids
- The document is a chemistry exam paper assessing knowledge of particulate nature of matter including diffusion, Brownian motion, and properties of solids, liquids, and gases.
- It contains 5 multi-part questions testing understanding of acid-base reactions, properties of halogens, uses of selenium and sulfur, bonding in covalent compounds, and properties of ethanoic acid.
- Students must demonstrate knowledge of key concepts through written explanations, diagrams, equations, and interpreting provided data in the form of a graph.
The document is a chemistry question paper that covers several topics related to stoichiometry and the preparation and properties of salts and metals. It contains multiple questions involving calculations related to reactions between calcium carbonate and hydrochloric acid, the preparation of nickel(II) chloride and potassium chloride salts, and the isolation of titanium from its ore. The questions assess understanding of reaction rates and stoichiometry, acid-base reactions, precipitation reactions, and the properties and uses of transition metals.
The document contains a 9 question exam paper assessing knowledge of the periodic table and properties of group 1 metals, transition metals such as vanadium, and elements in period 2 such as carbon, nitrogen, fluorine and neon. Questions cover trends in physical and chemical properties, electronic configurations, oxidation states, bonding and structures.
The document is a chemistry exam paper containing multiple questions about nitrogen, fertilizers, and the Haber process. It includes:
- Questions about distinguishing between ammonium phosphate and calcium dihydrogenphosphate fertilizers through a chemical test.
- A question requiring a description of how ammonia is made through the Haber process, including the essential conditions and reaction equation.
- Further questions about the raw materials, catalyst, and uses of ammonia in the Haber process, and how changing temperature and pressure affects the reaction equilibrium.
This document consists of a 12-page chemistry exam for the International General Certificate of Secondary Education. The exam contains multiple choice and short answer questions testing knowledge of topics including the isolation of iron, alkene reactions, nitrogen dioxide, properties of Group 1 and 2 metals on the periodic table, and alkene polymerization. Diagrams and equations are included. A periodic table is provided on the final page.
This document consists of a 12-page chemistry exam for the International General Certificate of Secondary Education. The exam contains multiple choice and short answer questions testing knowledge of concepts including the isolation of iron, production of steel, properties and reactions of alkenes and alkynes, nitrogen dioxide, group 1 and 2 metals on the periodic table, and more. Diagrams, equations, and explanations are required to fully answer the questions.
This document is a 12-page exam for the International General Certificate of Secondary Education in Chemistry. It contains multiple choice and free response questions covering topics like iron production, calcium and mineral supplements, alkene reactions, and nitrogen dioxide. Students are instructed to write their identifying information, show all work, and answer all questions in the spaces provided on the exam pages.
This document consists of a chemistry exam paper with multiple choice and short answer questions testing knowledge of chemistry concepts and principles. It includes questions on the periodic table, chemical reactions, states of matter, chemical bonding, and properties and reactions of various elements and compounds. The paper provides context for summarizing key chemistry ideas assessed on the exam.
This document contains a chemistry question paper with multiple parts testing knowledge of stoichiometry, thermochemical reactions, properties of elements and compounds, and reactions of sulfur compounds. The paper includes questions involving mole calculations, identifying products of reactions when substances are heated, describing physical properties and structures of macromolecular substances, writing balanced equations and describing conditions for industrial reactions.
This document provides instructions for a chemistry exam. It outlines that candidates have 1 hour and 15 minutes to complete the exam. They should write their identifying information in the spaces provided. The exam consists of 12 printed pages and candidates should answer all questions in the spaces on the paper. No additional materials are allowed.
This document appears to be an exam for the subject of chemistry, consisting of multiple choice and short answer questions covering various topics in chemistry including the periodic table, chemical reactions, states of matter, and properties of metals. The exam provides a periodic table, questions to be answered on the exam paper provided, and is 16 pages in length.
This document appears to be an exam paper for chemistry. It consists of multiple choice and short answer questions testing knowledge of chemistry concepts including the periodic table, chemical reactions, states of matter, and experimental procedures. The questions cover topics such as identifying elements on the periodic table, writing balanced chemical equations, describing phase changes and molecular motion, naming compounds, and explaining laboratory techniques.
This document appears to be an exam paper for chemistry. It consists of multiple choice and short answer questions testing knowledge of chemistry concepts including the periodic table, chemical reactions, states of matter, and experimental procedures. The questions cover topics such as identifying elements on the periodic table, writing balanced chemical equations, describing phase changes and molecular motion, naming compounds, and explaining laboratory techniques.
AQA AS Chemistry Atomic Structure QuestionsGodschild24
This document contains sample chemistry problems and questions regarding various topics:
1) Using the ideal gas equation to calculate the volume of ethanol vapor under certain pressure and temperature conditions.
2) Balancing a chemical equation and calculating moles of a substance produced.
3) Calculating the maximum mass of a product formed from a given mass of a reactant over two reaction stages.
4) Stating the relative charge and mass of an electron, identifying properties of chromium isotopes, and explaining mass spectrometry.
5) Calculating an empirical formula from elemental composition percentages.
This document is a 17-page chemistry exam consisting of multiple choice and short answer questions covering topics like purification methods, petroleum fractions, limestone thermal decomposition, bromine extraction, and aluminum electrolysis. It includes a 3-page periodic table and some blank pages. Students are to answer all questions directly on the exam paper using a dark pen or pencil and without other materials.
This document contains information about four experiments conducted to investigate the rate of reaction between solutions J and K and sulfuric acid at different temperatures. The key details are:
- Experiment 1 was conducted at room temperature and used as the baseline. Experiments 2-4 heated the mixture to increasing temperatures before adding solution K.
- The time taken for the mixtures to turn pale yellow was recorded.
- A line graph of time vs average temperature showed the rate of reaction increased with increasing temperature.
- Extrapolating the graph indicated a temperature of 60°C would yield a reaction time of around 15 seconds.
This document is a chemistry exam question paper that tests students' knowledge of types of oxides. It contains 16 multiple choice questions about classifying elements based on whether their oxides are acidic or basic, identifying properties of acidic and basic oxides, and predicting reactions of oxides with acids and bases. The questions cover topics like the positions of elements in the periodic table that relate to the acidity or basicity of their oxides, and common reactions of oxides like neutralization. The document also provides the grade boundaries for scoring the exam.
This document provides a chemistry exam on acids, bases and salts from the Cambridge International Examinations board. It contains 21 multiple choice questions testing understanding of concepts such as the preparation of salts from reactions between acids and bases or metal oxides. Students are asked about the purpose of steps in salt preparation procedures, the products and reagents of different salt forming reactions, and the equipment used. The document also provides the grade boundaries for the exam.
1. The document is a biology exam paper covering the topic of coordination and response. It contains 50 multiple choice questions testing students' understanding of topics like reflex arcs, hormones, homeostasis, and plant tropisms.
2. The questions cover a range of concepts in human physiology and plant biology including the eye, skin, circulatory and nervous systems, temperature regulation, tropic responses, and hormonal coordination.
3. Additional resources for students can be found at the website savemyexams.co.uk which provides GCSE and A level materials across multiple subjects.
1. The document is an exam paper on acids and bases for IGCSE Chemistry. It contains 31 multiple choice questions testing knowledge of acid-base reactions and properties.
2. The questions cover topics like the characteristic properties of acids and bases, pH scales, acid-base indicators, and reactions like neutralization and those that produce carbon dioxide or ammonia gas.
3. Sample questions identify acids and bases, interpret acid-base titration curves, and write balanced equations for acid-base reactions.
This document contains a 25 question biology exam on coordination and response. It tests students' understanding of topics like reflexes, homeostasis, the nervous and endocrine systems, plant tropisms, and human physiology. Diagrams of biological structures like the eye, neurons, and plant shoots accompany several questions. The exam is scored out of 25 marks and is designed to take 30 minutes to complete.
This document contains an excerpt from a biology exam on coordination and response. It includes several multiple choice and short answer questions testing understanding of topics like the nervous system, reflexes, plant tropisms, homeostasis, and glucose regulation. Diagrams are provided of biological systems like the mammalian nervous system, a reflex arc, seedling growth responses, human skin response to cold, the liver and associated blood vessels, and control of blood glucose concentration. Students are asked to label parts, describe processes, explain concepts, and perform basic calculations.
This document contains a biology exam paper on coordination and response. It includes multiple choice and short answer questions testing understanding of topics like sensitivity, voluntary vs involuntary actions, reflex arcs, hormones, and how the nervous and endocrine systems coordinate organs and responses in the body. The exam is for IGCSE level and contains 58 minutes worth of content divided into 4 sections with a total possible score of 48 marks.
The students use a starting pistol, stopwatch, and measuring tape to measure the speed of sound. One student fires the starting pistol while the other times how long it takes the sound to travel a known distance measured with the tape. They calculate the speed of sound by dividing the distance traveled by the time taken.
The document contains multiple choice questions about sound waves and ultrasound. It covers topics like the range of human hearing, properties that determine the loudness and pitch of sounds, how echoes are produced, and using the speed of sound to calculate distances.
Ultrasound cannot be heard by humans because its frequency is too high. The range of audible sound frequencies for humans is typically 20 Hz to 20 kHz. A louder or higher pitched sound will have a greater amplitude and higher frequency respectively. Sound is a longitudinal wave that requires a medium, such as air or water, to travel through and be heard.
This document provides the mark scheme for an International General Certificate of Secondary Education (IGCSE) chemistry exam from May/June 2010. It shows teachers how to award marks to exam answers and serves as guidance, though alternative answers may be acceptable. The mark scheme details the requirements for each question on the exam paper and provides sample answers with marks allocated. CIE will not discuss or justify the mark scheme further.
This document is the mark scheme for the May/June 2010 International General Certificate of Secondary Education (IGCSE) Chemistry exam. It provides guidance to teachers on how to award marks for exam questions. The mark scheme indicates the requirements to receive marks and shows the basis on which examiners were instructed to award marks. It does not discuss the examiners' meetings before marking began. CIE will not enter into discussions about the mark schemes. CIE is publishing mark schemes for most IGCSE, GCE Advanced Level, and Advanced Subsidiary Level exams from May/June 2010.
This document consists of 16 pages related to a chemistry exam, including:
1. 15 multiple choice questions on chemistry topics
2. 1 blank page
3. Instructions for exam takers on how to fill out the multiple choice answer sheet.
This document provides instructions for a chemistry exam. It consists of 16 printed pages and covers topics like gases, hydrogen compounds, cobalt chloride, seawater compounds, fertilizers, metals and extraction, petroleum, and conductivity. Students are instructed to write their identification details on the paper and answer all questions in dark blue or black pen, using a pencil for diagrams. They should not use staples or correction fluid. The exam is 1 hour and 15 minutes long.
This document provides instructions for a chemistry exam. It tells students to write their identification information at the top, use dark ink or pencil for diagrams, and do not use staples or correction fluid. It lists the number of marks for each question. The exam contains 15 printed pages and 1 blank page. A periodic table is provided on page 16. Students should answer all questions and fasten their work together at the end.
This document provides the mark scheme for the May/June 2011 International General Certificate of Secondary Education (IGCSE) Chemistry exam. It lists the correct answers for the 40 multiple choice questions on the exam paper and is intended to guide teachers in marking the exam. The document also notes that Cambridge will not enter into discussions about the mark schemes and that they are publishing mark schemes for most IGCSE and other exam papers from May/June 2011.
This document contains a mark scheme for an International General Certificate of Secondary Education (IGCSE) chemistry exam. It provides guidance for teachers on how to award marks for students' answers. The mark scheme shows the requirements for earning marks, but does not discuss alternative answers that may also be acceptable. It should be read along with the exam question papers and exam report. Cambridge will not enter into discussions about the mark scheme. The mark scheme then provides details on how marks were allocated to sample questions and student responses for various concepts in chemistry.
This document consists of 16 printed pages containing a chemistry exam with multiple choice questions. The exam tests knowledge of chemistry concepts including the periodic table, chemical reactions, and properties of substances. It provides answer choices for students to select during the exam.
This document provides instructions for a chemistry exam. It tells students to write their identification on all work, use blue or black pen with pencil for diagrams, and not to use staples, paper clips, etc. It lists the number of marks for each question. It provides a periodic table and instructions to fasten all work together at the end. It consists of 11 printed pages and 1 blank page for working.
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
Temple of Asclepius in Thrace. Excavation resultsKrassimira Luka
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
-------------------------------------------------------------------------------
Find out more about ISO training and certification services
Training: ISO/IEC 27001 Information Security Management System - EN | PECB
ISO/IEC 42001 Artificial Intelligence Management System - EN | PECB
General Data Protection Regulation (GDPR) - Training Courses - EN | PECB
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
-------------------------------------------------------------------------------
For more information about PECB:
Website: https://pecb.com/
LinkedIn: https://www.linkedin.com/company/pecb/
Facebook: https://www.facebook.com/PECBInternational/
Slideshare: http://www.slideshare.net/PECBCERTIFICATION
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
1. Fuels & Alkanes
Question Paper 1
Level IGCSE
ExamBoard CIE
Topic Organic Chemistry
Sub-Topic Fuels & Alkanes
Paper (Extended) Theory
Booklet Question Paper 1
90 minutes
/75
TimeAllowed
: Score:
Percentage: /100
Subject Chemistry
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
2. 1 (a) Hydrocarbons are compounds which contain hydrogen and carbon only.
• 10cm3
of a gaseous hydrocarbon, CxHy, are burned in 100cm3
of oxygen, which is an
excess of oxygen.
• After cooling to room temperature and pressure, there is 25cm3
of unreacted oxygen,
50cm3
of carbon dioxide and some liquid water.
All volumes are measured under the same conditions of temperature and pressure.
(i) What is meant by an excess of oxygen?
....................................................................................................................................... [1]
(ii) What was the volume of oxygen that reacted with the hydrocarbon?
....................................................................................................................................... [1]
(iii) Complete the table below to express the smallest whole number ratio of
volume of
hydrocarbon reacted
:
volume of
oxygen reacted
:
volume of
carbon dioxide
produced
volume of
hydrocarbon reacted
volume of
oxygen reacted
volume of
carbon dioxide
produced
smallest whole
number ratio of
volumes
[1]
(iv) Use your answer to (a)(iii) to find the mole ratio in the equation below. Complete the
equation and deduce the formula of the hydrocarbon.
.........CxHy(g) + .........O2(g) → .........CO2(g) + .........H2O(l)
formula of hydrocarbon = ...........................................
[2]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
3. (b) Cracking is used to convert long chain alkanes into shorter chain alkanes and alkenes. Alkenes
are unsaturated compounds.
Decane, C10H22, can be cracked to give propene and one other product.
(i) Complete the chemical equation.
C10H22 → C3H6 + ...............
[1]
(ii) What is meant by the term unsaturated?
....................................................................................................................................... [1]
(iii) Describe a test to show that propene is an unsaturated compound.
test ......................................................................................................................................
result ...................................................................................................................................
[2]
(c) Propene can be polymerised. The only product is polypropene. The equation for the
polymerisation is:
n
C
H
CH3
C
H
H
nC3H6
(i) Name the type of polymerisation that occurs.
....................................................................................................................................... [1]
(ii) Deduce the maximum mass of polypropene that could be produced from 1kg of propene.
............... kg [1]
(iii) Give the empirical formula of
propene, .............................................................................................................................
polypropene. .......................................................................................................................
[2]
[Total: 13]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
4. 2 Two homologous series of hydrocarbons are the alkanes and the alkenes.
(a)a) One general characteristic of a homologous series is that the physical properties vary in a
predictable way.
State three other general characteristics of a homologous series.
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
(ii) How can the molecular formula of a hydrocarbon show whether it is an alkane
or an alkene?
.............................................................................................................................................
....................................................................................................................................... [2]
(iii) How do alkanes and alkenes differ in their molecular structures?
.............................................................................................................................................
....................................................................................................................................... [2]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
5. (b) Cracking is the thermal decomposition of alkanes into smaller hydrocarbons and
possibly hydrogen.
(i) State two conditions required for the cracking of an alkane.
....................................................................................................................................... [2]
(ii) One type of cracking produces an alkane and an alkene.
Complete an equation for the cracking of heptane into an alkane and an alkene.
7H16 oC ................ + ................
[1]
(iii) Complete an equation for the cracking of heptane into hydrogen and two other
products.
7H16 oC ................ + ................ + H2
[1]
(iv) Suggest one reason why cracking is important.
....................................................................................................................................... [1]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
6. (c) Hydrocarbons burn in excess oxygen to form carbon dioxide and water. 20cm3 of a gaseous
hydrocarbon burned in an excess of oxygen, 200cm3. After cooling, the volume of the residual
gas at r.t.p. was 150cm3, 50cm3 of which was oxygen.
(i) Determine the volume of the oxygen used.
....................................................................................................................................... [1]
(ii) Determine the volume of the carbon dioxide formed.
....................................................................................................................................... [1]
(iii) The hydrocarbon was an alkane.
Determine the formula of the hydrocarbon.
[1]
[Total: 15]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
7. 3 (a) Coal is a solid fossil fuel.
Name two other fossil fuels.
.............................................................................................................................................. [2]
(b) Two of the elements present in a sample of coal are carbon and sulfur.
A sample of coal was heated in the absence of air and the products included water, ammonia
and hydrocarbons.
Name three other elements present in this sample of coal.
.............................................................................................................................................. [2]
(c) Sulfur, present in coal, is one major cause of acid rain. Sulfur burns to form sulfur dioxide which
reacts with rain water to form sulfuric acid.
(i) Describe how the high temperatures in vehicle engines are another cause of acid rain.
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
(ii) Give two harmful effects of acid rain.
.............................................................................................................................................
....................................................................................................................................... [2]
(d) In 2010, a large coal-burning power station in the UK was converted to burn both coal and
wood.
Explain why the combustion of wood rather than coal can reduce the effect of the emissions
from this power station on the level of carbon dioxide in the atmosphere.
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
.............................................................................................................................................. [3]
[Total: 12]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
8. 4 (a) (i) Coal is a solid fossil fuel. Name another fossil fuel.
....................................................................................................................................... [1]
(ii) Explain what is meant by the term fossil fuel.
.............................................................................................................................................
....................................................................................................................................... [2]
(b) The burning of fossil fuels is largely responsible for the formation of acid rain.
Two of the acids in acid rain are sulfuric acid and nitric acid.
(i) Explain how the combustion of coal can form sulfuric acid.
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
9. (ii) High temperatures generated by the combustion of fossil fuels can lead to the
formationof nitric acid. Explain.
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
(iii) Nitric acid contains nitrate ions.
Describe a test for nitrate ions.
.............................................................................................................................................
....................................................................................................................................... [2]
(iv) Explain how you could determine which one of two samples of acid rain had the
higher concentration of hydrogen ions.
.............................................................................................................................................
....................................................................................................................................... [2]
[Total: 13]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
10. 5 Butane is oxidised to a mixture of carboxylic acids by oxygen in the presence of a catalyst.
The acids formed are methanoic acid, ethanoic acid and propanoic acid – the first three members
of the carboxylic acid homologous series.
(a)a) Give the name and structural formula of the fourth member of this series.
name ...................................................................................................................................
structural formula showing all the atoms and bonds
[3]
(ii) State three characteristics of a homologous series.
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
(iii) All members of this series are weak acids.
What is meant by the term weak acid?
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [3]
(b) Carboxylic acids react with alcohols to form esters. Ethanol reacts with ethanoic acid to form
the ester ethyl ethanoate, CH3COOCH2CH3.
(i) Give the name and formula of the ester which is formed from methanol and propanoic
acid.
name ...................................................................................................................................
formula ................................................................................................................................
[2]
(ii) What is the name of the ester which has the formula CH3COOCH3?
....................................................................................................................................... [1]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
11. (c)c) Complete the equation for the oxidation of butane to propanoic acid.
3C4H10 + .........O2 → 4C2H5COOH + .......H2O
[1]
(ii) Name another compound which can be oxidised to propanoic acid.
....................................................................................................................................... [1]
[Total: 14]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/
12. 6 (a) Natural gas, which is mainly methane, is a fossil fuel.
(i) What is meant by the term fuel?
.............................................................................................................................................
....................................................................................................................................... [1]
(ii) Name two other fossil fuels.
....................................................................................................................................... [2]
(iii) Name a solid fuel which is not a fossil fuel.
....................................................................................................................................... [1]
(b) Fossil fuels are formed by the anaerobic decomposition of organic matter. Anaerobic means in
the absence of oxygen.
(i) The organic matter contains hydrogen and carbon. Suggest the products that would be
formed if the decomposition occurred in the presence of oxygen.
....................................................................................................................................... [2]
(ii) What are the two main disadvantages in the widespread use of fossil fuels?
.............................................................................................................................................
.............................................................................................................................................
....................................................................................................................................... [2]
[Total: 8]
Save My Exams! – The Home of Revision
For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/