This chemistry worksheet discusses manufactured substances in industry. It provides information on the manufacturing processes of sulphuric acid, ammonia, steel, and other substances. Students are asked questions to test their understanding of industrial chemistry concepts like chemical reactions, catalysts, and the properties and uses of manufactured materials. Diagrams of industrial processes and molecular structures are included to help explain key ideas.
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.
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 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 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 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.
The document contains questions and explanations about corrosion and rusting of metals. It discusses the conditions required for rusting of iron, the meaning of corrosion, and half reactions involved. It explains why iron rusts faster near the sea and why gold does not corrode easily compared to magnesium. The document also describes the electrochemical series and processes involved in rusting like oxidation, reduction, and formation of a voltaic cell. Different methods to control rusting like using protective coatings, sacrificial protection, and alloying are also discussed.
Samples of Competitive Examination Questions: Part XXXXXXIIIAli I. Al-Mosawi
كتاب (نماذج أسئلة الإمتحان التنافسي/ إعداد علي إبراهيم الموسوي)
الجزء الثالث والستون:
ماجستير إرشاد تربوي قسم الإرشاد النفسي والتوجيه التربوي كلية التربية للعلوم الإنسانية جامعة البصرة ... ماجستير تأريخ حديث ومعاصر كلية التربية جامعة المثنى ... دكتوراه إنتاج ومعادن/ هندسة الإنتاج قسم الإنتاج والمعادن الجامعة التكنولوجية ... دكتوراه إنتاج ومعادن/ هندسة المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... دكتوراه إنتاج ومعادن/ هندسة صناعية قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة الإنتاج قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة إستخلاص المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير هندسة إنتاج، معادن، مواد هندسية ... ماجستير طرائق تدريس العلوم كلية التربية الأساسية الجامعة المستنصرية.
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.
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.
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 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 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 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.
The document contains questions and explanations about corrosion and rusting of metals. It discusses the conditions required for rusting of iron, the meaning of corrosion, and half reactions involved. It explains why iron rusts faster near the sea and why gold does not corrode easily compared to magnesium. The document also describes the electrochemical series and processes involved in rusting like oxidation, reduction, and formation of a voltaic cell. Different methods to control rusting like using protective coatings, sacrificial protection, and alloying are also discussed.
Samples of Competitive Examination Questions: Part XXXXXXIIIAli I. Al-Mosawi
كتاب (نماذج أسئلة الإمتحان التنافسي/ إعداد علي إبراهيم الموسوي)
الجزء الثالث والستون:
ماجستير إرشاد تربوي قسم الإرشاد النفسي والتوجيه التربوي كلية التربية للعلوم الإنسانية جامعة البصرة ... ماجستير تأريخ حديث ومعاصر كلية التربية جامعة المثنى ... دكتوراه إنتاج ومعادن/ هندسة الإنتاج قسم الإنتاج والمعادن الجامعة التكنولوجية ... دكتوراه إنتاج ومعادن/ هندسة المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... دكتوراه إنتاج ومعادن/ هندسة صناعية قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة الإنتاج قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير إنتاج ومعادن/ هندسة إستخلاص المعادن قسم الإنتاج والمعادن الجامعة التكنولوجية ... ماجستير هندسة إنتاج، معادن، مواد هندسية ... ماجستير طرائق تدريس العلوم كلية التربية الأساسية الجامعة المستنصرية.
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.
This lecture describes the function and design of all parts of the running and gating systems used in the production of castings. The students will be able to tackle the design of a simple running system in a systematic manner. Basic knowledge of foundry processes and basic mathematics is assumed.
Effect of Milling Time on Al-Fe-Cr-20 Wt. % Al2O3composite Prepared Through B...IJERA Editor
One of the main challenges towards achieving a homogeneous distribution of the ceramic phase in the metal matrix composites is agglomeration of the reinforcement particles. Mechanical alloying is among the most important processing techniques used for manufacturing of metal matrix composites (MMCs).An attempt was made to synthesize Al-Fe-Cr-Al2O3composites synthesized through mechanical alloying. Al2O3 is used as reinforcement. Ethanol (5 wt. %) has been used as a process control agent (PCA). Mechanical alloying is carried out in a conventional ball mill using stainless steel grinding media at 115 rpm in the argon environment for 5h, 10h and 15h. The ball to powder weight ratio was maintained at 20:1. The characterization of the ball milled powder was followed by scanning electron microscopy (SEM). Showed the formation of a homogeneous phase for all compositions after milling for 15 h. XRD patterns were recorded for the milled powders, and analyzed using Williamson–Hall method and Scherrer’s equation to determine the lattice strain and grain size.EDX is performed to check the contamination of composites during the mechanical alloying.XRD is used to study structural evolution of synthesized aluminium composite. Effect of milling time is investigated on synthesized Al-Fe-Cr-20 wt. % Al2O3 composites.
This document contains a physics module with 6 sections covering various topics:
1) Springs and their properties like spring constant.
2) Measurement of atmospheric pressure using a barometer.
3) Forces acting on objects in motion and examples of Newton's laws.
4) Forces acting on wheelbarrows on muddy surfaces.
5) Design considerations for submarines operating on the surface and underwater.
6) Investigation of the relationship between gas pressure and volume through an experiment.
Corrosion costs billions annually to replace failed infrastructure like bridges and pipelines. It also reduces efficiency and results in production shutdowns, lost product, and contamination. Corrosion is caused by various mechanisms and affected by environmental factors. This handbook provides information on corrosion mechanisms, forms of corrosion like uniform and pitting corrosion, factors influencing corrosion, and material properties to help designers prevent corrosion failures and economic losses.
The document discusses casting processes and properties of cast materials. It includes figures and tables about temperature and density changes during solidification of pure metals and alloys, phase diagrams, cast microstructures, mold features, temperature distributions during casting, shrinkage rates of metals, mechanical properties of various cast alloys, and a table comparing characteristics of different casting processes. The figures and tables provide data on material properties and process characteristics.
This lecture provides an introduction to factors affecting the quality of molten aluminium. Basic knowledge of foundry practice is assumed. The student should be able to appreciate the differences between good and bad melting practices in a foundry.
This document consists of chemistry exam questions covering various topics including the structure of atoms and ions, properties of metals and alloys, industrial chemical processes such as the Haber process and polymerization, oxidation states and the periodic table, and the carbon cycle. It contains multiple choice and short answer questions testing understanding of concepts as well as calculations. A periodic table is provided for reference.
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 contains figures and tables from the textbook "Manufacturing Processes for Engineering Materials" describing various manufacturing processes and properties of materials at the atomic level. It discusses the crystal structures of metals, defects in crystal lattices, grain formation during solidification, plastic deformation through slip and twinning, strengthening via reducing grain size, and different types of material failure including brittle fracture and ductile shear. The document serves as a reference for understanding materials behavior at the microscopic scale.
The document discusses various polymer properties including:
- A table listing the tensile strength, elastic modulus, elongation, and Poisson's ratio ranges for various engineering plastics.
- Descriptions of polymer molecular structures, the relationship between molecular weight and properties, and how crystallinity and cross-linking affect properties.
- Explanations of glass transition temperature, the various modes of polymer deformation, and how temperature impacts properties like stress-strain behavior and impact strength.
- Information on viscosity for melted polymers and how it is affected by temperature and shear rate.
2012 deep research report on china special steel industrysmarter2011
This document provides a 182-page research report on China's special steel industry in 2012. It analyzes special steel definitions, classifications, manufacturing processes, product structures, applications and consumption trends. It also examines the productions, capacities, market shares and financial performances of China's 32 major special steel manufacturers as well as 11 other manufacturers. Key findings include that automotive and machinery industries are the largest consumers of special steel, and special steel production has been growing steadily in China with rising demand. The report aims to provide an in-depth analysis of the special steel industry in China.
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 discusses corrosion in desalination plants, focusing on multi-stage flash distillation plants. Severe corrosion occurs due to the operating environment of seawater, gases, and fast moving liquids. Flash chambers experience high corrosion rates due to violent brine flashing, high chloride content, and high copper in recirculating brine. Material selection is important to prevent corrosion and achieve long design lives of 40-50 years for desalination plants. Both historical experience and emerging technologies like multi-effect distillation must be considered to optimize materials.
The document summarizes research characterizing the forming behavior of aluminum alloy AA5754 at elevated temperatures. Key findings from tensile and forming tests are:
1) Yield strength, strain hardening exponent, and flow stress decrease with increasing temperature, while elongation increases.
2) Warm forming from 100-250°C improves formability over room temperature forming.
3) A test setup was developed to evaluate forming limits at elevated temperatures up to 250°C.
This document discusses machining processes and metal cutting. It begins with an overview of common machining processes like turning and milling. It then covers topics such as orthogonal cutting, chip formation, different chip types, cutting forces, temperatures in cutting, tool geometry and wear. Diagrams illustrate cutting tool geometry, forces acting on tools, chip formation mechanisms, and experimental data on cutting parameters for different materials. The document provides information on machining processes and metal cutting for engineering materials.
The document discusses powder metallurgy manufacturing processes. It describes how metal powders of different shapes and sizes are produced through various methods like atomization. The powders are then compacted through pressing and sintered to form final parts. Compaction increases density which improves mechanical properties. Hot isostatic pressing allows for full density. Sintering bonds powder particles through diffusion and reduces porosity. Processes like powder rolling and spray forming offer alternatives to produce net-shape parts. Final properties depend on factors like density, temperature, and time applied during sintering.
The document contains 10 multiple choice questions about chemical reaction rates. The questions cover topics like factors that affect reaction rates such as concentration, temperature, catalysts and surface area. They also ask about interpreting graphs of reaction rates over time and calculating average rates of reaction from data provided.
Ancient Egypt had fertile land along the Nile River which supported agriculture. Desert protected Egypt's borders and also contained tombs and pyramids. Villages used mudbrick homes and temples were made of stone. Important structures included temples, pyramids containing tombs, and roads connecting cities. Lakes like the Nile River and Victoria were also part of Egypt's geography. Major cities included Giza in northern Egypt and Thebes in central Egypt.
The document is a personal essay describing the author's experience in a two-week filmmaking summer camp. It discusses how the author learned to write a movie script and make a film by directing scenes and editing footage. Though initially unsure of their abilities, the author found the process enjoyable thanks to support from teachers and peers. By watching other students' films and working behind the scenes, the author gained a deeper understanding and appreciation of filmmaking. While their own film had some flaws, the overall experience left the author with a continued interest in storytelling and film.
This document contains a list of students divided into 5 groups, with each group assigned a topic related to the impacts of climate change. Group 1 is discussing loss of biomass, group 2 loss in biodiversity, group 3 changes in nutrient cycle, group 4 changes in quantity of water, and group 5 changes in quality of water. The final group, group 6, is discussing air pollution. Each student is assigned to a single group and topic for discussion.
Problems caused by deforestation in kalimantanMdm Wendy Lim
Deforestation in Kalimantan has led to several problems:
1. Loss of biomass has reduced the ability of the rainforests to support plant and animal life as it has disrupted the food chain.
2. Biodiversity has declined as deforestation has contributed to the extinction of plant and animal species.
3. Changes to the nutrient cycle have made the soil infertile as leaf litter and roots that absorb rainwater have been removed.
This Mathematics Instructor Grading Rubric assesses students on specific skills and key components necessary to memorize and complete in the unit circle.
This lecture describes the function and design of all parts of the running and gating systems used in the production of castings. The students will be able to tackle the design of a simple running system in a systematic manner. Basic knowledge of foundry processes and basic mathematics is assumed.
Effect of Milling Time on Al-Fe-Cr-20 Wt. % Al2O3composite Prepared Through B...IJERA Editor
One of the main challenges towards achieving a homogeneous distribution of the ceramic phase in the metal matrix composites is agglomeration of the reinforcement particles. Mechanical alloying is among the most important processing techniques used for manufacturing of metal matrix composites (MMCs).An attempt was made to synthesize Al-Fe-Cr-Al2O3composites synthesized through mechanical alloying. Al2O3 is used as reinforcement. Ethanol (5 wt. %) has been used as a process control agent (PCA). Mechanical alloying is carried out in a conventional ball mill using stainless steel grinding media at 115 rpm in the argon environment for 5h, 10h and 15h. The ball to powder weight ratio was maintained at 20:1. The characterization of the ball milled powder was followed by scanning electron microscopy (SEM). Showed the formation of a homogeneous phase for all compositions after milling for 15 h. XRD patterns were recorded for the milled powders, and analyzed using Williamson–Hall method and Scherrer’s equation to determine the lattice strain and grain size.EDX is performed to check the contamination of composites during the mechanical alloying.XRD is used to study structural evolution of synthesized aluminium composite. Effect of milling time is investigated on synthesized Al-Fe-Cr-20 wt. % Al2O3 composites.
This document contains a physics module with 6 sections covering various topics:
1) Springs and their properties like spring constant.
2) Measurement of atmospheric pressure using a barometer.
3) Forces acting on objects in motion and examples of Newton's laws.
4) Forces acting on wheelbarrows on muddy surfaces.
5) Design considerations for submarines operating on the surface and underwater.
6) Investigation of the relationship between gas pressure and volume through an experiment.
Corrosion costs billions annually to replace failed infrastructure like bridges and pipelines. It also reduces efficiency and results in production shutdowns, lost product, and contamination. Corrosion is caused by various mechanisms and affected by environmental factors. This handbook provides information on corrosion mechanisms, forms of corrosion like uniform and pitting corrosion, factors influencing corrosion, and material properties to help designers prevent corrosion failures and economic losses.
The document discusses casting processes and properties of cast materials. It includes figures and tables about temperature and density changes during solidification of pure metals and alloys, phase diagrams, cast microstructures, mold features, temperature distributions during casting, shrinkage rates of metals, mechanical properties of various cast alloys, and a table comparing characteristics of different casting processes. The figures and tables provide data on material properties and process characteristics.
This lecture provides an introduction to factors affecting the quality of molten aluminium. Basic knowledge of foundry practice is assumed. The student should be able to appreciate the differences between good and bad melting practices in a foundry.
This document consists of chemistry exam questions covering various topics including the structure of atoms and ions, properties of metals and alloys, industrial chemical processes such as the Haber process and polymerization, oxidation states and the periodic table, and the carbon cycle. It contains multiple choice and short answer questions testing understanding of concepts as well as calculations. A periodic table is provided for reference.
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 contains figures and tables from the textbook "Manufacturing Processes for Engineering Materials" describing various manufacturing processes and properties of materials at the atomic level. It discusses the crystal structures of metals, defects in crystal lattices, grain formation during solidification, plastic deformation through slip and twinning, strengthening via reducing grain size, and different types of material failure including brittle fracture and ductile shear. The document serves as a reference for understanding materials behavior at the microscopic scale.
The document discusses various polymer properties including:
- A table listing the tensile strength, elastic modulus, elongation, and Poisson's ratio ranges for various engineering plastics.
- Descriptions of polymer molecular structures, the relationship between molecular weight and properties, and how crystallinity and cross-linking affect properties.
- Explanations of glass transition temperature, the various modes of polymer deformation, and how temperature impacts properties like stress-strain behavior and impact strength.
- Information on viscosity for melted polymers and how it is affected by temperature and shear rate.
2012 deep research report on china special steel industrysmarter2011
This document provides a 182-page research report on China's special steel industry in 2012. It analyzes special steel definitions, classifications, manufacturing processes, product structures, applications and consumption trends. It also examines the productions, capacities, market shares and financial performances of China's 32 major special steel manufacturers as well as 11 other manufacturers. Key findings include that automotive and machinery industries are the largest consumers of special steel, and special steel production has been growing steadily in China with rising demand. The report aims to provide an in-depth analysis of the special steel industry in China.
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 discusses corrosion in desalination plants, focusing on multi-stage flash distillation plants. Severe corrosion occurs due to the operating environment of seawater, gases, and fast moving liquids. Flash chambers experience high corrosion rates due to violent brine flashing, high chloride content, and high copper in recirculating brine. Material selection is important to prevent corrosion and achieve long design lives of 40-50 years for desalination plants. Both historical experience and emerging technologies like multi-effect distillation must be considered to optimize materials.
The document summarizes research characterizing the forming behavior of aluminum alloy AA5754 at elevated temperatures. Key findings from tensile and forming tests are:
1) Yield strength, strain hardening exponent, and flow stress decrease with increasing temperature, while elongation increases.
2) Warm forming from 100-250°C improves formability over room temperature forming.
3) A test setup was developed to evaluate forming limits at elevated temperatures up to 250°C.
This document discusses machining processes and metal cutting. It begins with an overview of common machining processes like turning and milling. It then covers topics such as orthogonal cutting, chip formation, different chip types, cutting forces, temperatures in cutting, tool geometry and wear. Diagrams illustrate cutting tool geometry, forces acting on tools, chip formation mechanisms, and experimental data on cutting parameters for different materials. The document provides information on machining processes and metal cutting for engineering materials.
The document discusses powder metallurgy manufacturing processes. It describes how metal powders of different shapes and sizes are produced through various methods like atomization. The powders are then compacted through pressing and sintered to form final parts. Compaction increases density which improves mechanical properties. Hot isostatic pressing allows for full density. Sintering bonds powder particles through diffusion and reduces porosity. Processes like powder rolling and spray forming offer alternatives to produce net-shape parts. Final properties depend on factors like density, temperature, and time applied during sintering.
The document contains 10 multiple choice questions about chemical reaction rates. The questions cover topics like factors that affect reaction rates such as concentration, temperature, catalysts and surface area. They also ask about interpreting graphs of reaction rates over time and calculating average rates of reaction from data provided.
Ancient Egypt had fertile land along the Nile River which supported agriculture. Desert protected Egypt's borders and also contained tombs and pyramids. Villages used mudbrick homes and temples were made of stone. Important structures included temples, pyramids containing tombs, and roads connecting cities. Lakes like the Nile River and Victoria were also part of Egypt's geography. Major cities included Giza in northern Egypt and Thebes in central Egypt.
The document is a personal essay describing the author's experience in a two-week filmmaking summer camp. It discusses how the author learned to write a movie script and make a film by directing scenes and editing footage. Though initially unsure of their abilities, the author found the process enjoyable thanks to support from teachers and peers. By watching other students' films and working behind the scenes, the author gained a deeper understanding and appreciation of filmmaking. While their own film had some flaws, the overall experience left the author with a continued interest in storytelling and film.
This document contains a list of students divided into 5 groups, with each group assigned a topic related to the impacts of climate change. Group 1 is discussing loss of biomass, group 2 loss in biodiversity, group 3 changes in nutrient cycle, group 4 changes in quantity of water, and group 5 changes in quality of water. The final group, group 6, is discussing air pollution. Each student is assigned to a single group and topic for discussion.
Problems caused by deforestation in kalimantanMdm Wendy Lim
Deforestation in Kalimantan has led to several problems:
1. Loss of biomass has reduced the ability of the rainforests to support plant and animal life as it has disrupted the food chain.
2. Biodiversity has declined as deforestation has contributed to the extinction of plant and animal species.
3. Changes to the nutrient cycle have made the soil infertile as leaf litter and roots that absorb rainwater have been removed.
This Mathematics Instructor Grading Rubric assesses students on specific skills and key components necessary to memorize and complete in the unit circle.
This document discusses how land is a limited resource through an activity where students stand on a sheet of newspaper representing land. As more students join, the space becomes crowded showing how adding people stresses available land. Some key points made are:
1) The newspaper/land becomes packed as more people stand on it, showing land is limited.
2) Reasons for rising land demand include population growth, more housing and industry needs, and increased farming.
3) When more people use a fixed area of land, it will become overcrowded and exceed its carrying capacity, putting pressure on land resources.
Floods occur when land is submerged by excessive water, such as from heavy rainfall, snow melt, high tides, or overflowing rivers and lakes. They have natural causes like storms, rainfall, snow melt, and atmospheric processes; and human causes involving deforestation, urban development, and greenhouse gas emissions. Deforestation reduces vegetation that intercepts rainfall, increasing surface runoff. Urbanization clears land and replaces vegetation with impermeable surfaces, also boosting surface runoff. Greenhouse gases cause global warming which increases heavy rainfall and raises sea levels. Human activities have contributed to more frequent and severe flooding.
1) The document is a geography worksheet about rivers that contains 3 questions.
2) The first question discusses the formation of a gorge through river erosion over long periods of time cutting down through resistant rock.
3) The second question addresses how waterfalls can form from differences in rock resistance leading to changes in river gradient, or from faulting and displacement of rocks.
4) The third question notes that floodplains and deltas both involve deposition, but floodplains only receive sediments during floods while deltas extend into seas and are constantly fed materials transported by rivers.
1. The document discusses mixed landuse projects, which combine different uses like shopping malls, offices, houses, and hotels in a small urban area linked by walkways and escalators. This allows for more efficient use of limited urban land.
2. The main advantages of mixed landuse projects are convenience for residents to have homes, jobs, and services nearby, as well as accommodating more users in the same land area.
3. The document also discusses high density urban development, noting that it maximizes land use, frees up land for other uses like green spaces, and reduces development of remaining green areas, though it can increase stress levels due to crowding.
The document provides information about geological and weathering concepts. It includes 4 multiple choice questions about soil particles being transported sediments, the least influential factor on rock weathering being the number of fossils, and streams' increased ability to carry sediment with higher gradients. It also discusses physical weathering examples and resistant rock layers in sedimentary outcrops.
This document contains a summary of Chapters 9 and 10 from an unknown text. It includes:
- A multiple choice quiz with 11 questions about various topics relating to pollution, its causes and effects, as well as individual and governmental efforts to reduce pollution.
- A section with basic data analysis questions about a graph showing forest fire hotspots in Sumatra.
- A section with structured questions analyzing a photograph showing coastal water pollution, extracts from a poem about noise pollution on a highway, and questions about the Kyoto Protocol and Singapore's efforts to reduce emissions.
The document tests the reader's understanding of pollution issues through different question formats requiring identification, analysis, and explanations. It covers various types of pollution
The document describes three different hot climates: equatorial, tropical, and desert. The equatorial climate has constant high temperatures and heavy rainfall throughout the year with no seasons. Tropical climates are located between the tropics and have distinct wet and dry seasons with temperatures always remaining high. Desert climates are very dry with little rainfall, high daytime temperatures but cool nights, and sparse vegetation adapted to irregular rain.
This document summarizes three main methods of land reclamation - landfill, reclaiming derelict land, and empoldering. It discusses that Singapore uses landfill methods to reclaim land but faces limitations of depth and reserving sea space. The document also includes a fact sheet and map of Country Y, asking questions about reclaiming an abandoned mine area for human use based on Country Y's population density, economic activities, and future plans like increasing water supply. Developments in areas A and B could affect the environment by losing natural habitats and damaging coral reefs.
The document is a worksheet for Class VIII science students about pollution of air and water. It contains questions about water purity, ozone gas, causes of dead zones in lakes, industrial water treatment processes, impacts of different pollutants on health, statements about pollution, reverse osmosis, eutrophication, identifying odd metals, and ozone depletion/hole formation. The key provided answers all the questions in the worksheet.
This document contains information about chapters 7 and 8 from a textbook. It includes multiple choice questions about land reclamation, land and water scarcity issues in Singapore, and methods used to overcome land and water constraints. Diagrams and a photograph are included to illustrate topics like reservoir locations, countries with high rates of land clearing, and a housing estate built on reclaimed land. The document tests understanding of concepts covered and requires analysis of diagrams and a photograph to answer questions.
This document is a chemistry exam paper from Maktab Rendah Sains Mara in September 2009. It contains information for students taking the trial SPM examination, including instructions, the exam code and sections. Section A contains 6 chemistry questions worth a total of 60 marks. The questions cover topics such as food ingredients, medicines, soap and water hardness, atomic structure, gas diffusion and heating curves.
This document is a specimen paper for the Cambridge Checkpoint Mathematics exam. It consists of 12 multiple choice and short answer questions testing a range of mathematical skills including: calculations with decimals, percentages and fractions; geometry; graphs; statistics; algebra; and number properties. The paper is designed to be completed in 1 hour without the use of a calculator.
This document is the Periodic Table of the Elements data sheet. It provides information about the elements including:
- The element's atomic number and symbol
- The element's relative atomic mass
- Which group and period the element is in
- Some key properties of each element
- The volume of one mole of any gas at room temperature and pressure
- Notes about the lanthanoid and actinoid series
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.
The document describes several experiments related to chemistry concepts:
1) An experiment to determine the empirical formula of copper(II) oxide by calculating mass changes before and after combustion.
2) Properties of elements in Period 3 of the periodic table such as electron configuration and reactivity.
3) The components and reactions occurring in a chemical cell using copper and zinc plates.
4) Characteristics and reactions of common salts like sodium carbonate and zinc nitrate.
5) The industrial process for producing ammonia through catalytic hydrogenation of nitrogen.
This document consists of exam questions for International GCSE Chemistry. It includes 11 pages of multiple choice and structured questions testing students' knowledge of topics including the periodic table, polymers, fertilizers, corrosion, and photochemical reactions. Students are instructed to answer all questions in dark blue or black pen without using staples or correction fluid. Their work will be collected and fastened together at the end of the exam.
This 12-page document consists of chemistry exam questions covering topics such as electron configurations, fossil fuels, plant growth and fertilizers, carboxylic acids, carbon monoxide production, electrolysis, scandium properties, and salt preparation and identification. The questions include multiple choice, short answer, drawing structures, explaining observations, and calculations.
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 contains instructions and questions for a chemistry exam. It includes 4 sections with multiple choice and structured questions about empirical formulas, the periodic table, industrial processes, and organic chemistry experiments. Students are asked to define terms, perform calculations, write equations, label diagrams, and describe chemical reactions and processes. The time suggested to complete the exam is 90 minutes.
This document contains sample questions from past science exams on various topics:
1. An experiment on the electrical conductivity of lead bromide, measuring the current through an ammeter.
2. An experiment using a concave lens to form an image.
3. An experiment culturing bacteria to study the relationship between colony growth and time.
4. An experiment comparing the elasticity of natural rubber and processed rubber.
It also provides multi-part questions testing the ability to form hypotheses, design experiments, analyze data, and apply science concepts. Questions cover topics like food processing, polymer properties, and classifying materials as conductors, insulators and thermoplastics/thermosets.
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 instructs students to answer all questions and notes that a periodic table is provided on page 12. It reminds students to fasten all work together at the end and lists the number of marks for each question or part.
This document provides instructions for a chemistry exam. It specifies that students should write their identification on all work, use dark blue or black pen with pencil allowed for diagrams, and not use staples, paper clips, or correction fluid. It notes the exam contains multiple choice and written answer questions and that calculators and a periodic table are permitted. It reminds students to show working and use appropriate units, and to fasten all work together at the end.
This document is a specimen paper for the Cambridge International General Certificate of Secondary Education Design and Technology exam. It consists of two sections, with Section A containing multiple choice and short answer questions testing core skills and knowledge, and Section B requiring longer answers to one question regarding design and manufacture considerations for a children's library table. Key topics covered include woodworking joints and tools, plastics manufacturing processes, health and safety procedures, and choosing appropriate materials.
This document is a specimen paper for the Cambridge International General Certificate of Secondary Education Design and Technology exam. It consists of two sections, with Section A containing multiple choice and short answer questions testing knowledge of materials and manufacturing processes. Section B contains a longer question asking students to discuss the design and manufacture of a children's library table. Key details include recommended materials, suitable manufacturing methods, and safety considerations.
This 3 sentence summary provides the key information from the document:
The document consists of instructions for a chemistry exam, outlining that students should write their identification details on all work, use blue or black pen with pencil for diagrams, and answer all questions. It details the format of the exam, including the use of calculators and showing working, and instructs students to fasten their work together at the end. The exam consists of 6 questions investigating various chemistry concepts and reactions through experiments and analysis.
The document provides information about electrolysis experiments using different electrolyte solutions and electrodes. In the first experiment, a sodium sulfate solution is electrolyzed using carbon electrodes. Ions move to the electrodes and gases are produced. Hydrogen gas is collected at one electrode. In the second experiment, dilute sodium chloride solution is electrolyzed and chlorine gas is collected at one electrode.
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.
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Revision form 4_topic_-_manufactured_substances_in_industry
1. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
Name : ....................................................................................
Form : ...........................
1 Figure 1 shows the flow chart for the industrial manufacture of sulphuric acid.
FIGURE 1
(a) Name the process of manufacturing sulphuric acid.
……………………………………………………………………………………...................
[1 mark]
(b) Name the substance W
…………………………………………………………………………………….. ................
[1 mark]
(c) State the temperature, pressure and catalyst for the reaction in process II
Temperature :………………………….........
Pressure : ……………………………....
Catalyst : ………………………………
[3 marks]
(d) Write the chemical equation for the reaction in process III
……………………………………………………………………………………...................
[1 mark]
(e) Give two uses of sulphuric acid.
……………………………………………………………………………………...................
[2 marks]
(f)
(i) What element does fibreglass consist of?
……………………………………………………………………………..................
(ii) What property makes it suitable for the above purpose?
……………………………………………………………………………..................
[2 marks]
1
S W SO3 H2S2O7 H2SO4
Process
I
Process
II
Process
III
Process
IV
Fibreglass is used in the making of helmets
2. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
2. The flow chart ini Figure 2 shows the manufacture of ammonia and its uses
Process I
Figure 2
(a) Name gas A and gas B
Gas A : ....................................................... Gas B : ...............................................................
[2 marks]
(b) Name Process I
......................................................................................................................................................
[1 mark]
(c) Write a balance chemical equation for Process I
......................................................................................................................................................
[1 mark]
(d) Ammonium fertilizers can be prepared by reactions between ammonia solutian
and acids.
(i) Write the chemical equation for the preparation of ammonium sulphate
fertilizer.
..............................................................................................................................................
.
[1 mark]
(ii) Urea, CO(NH2)2 is another example of ammonium fertilizers. Between urea
and ammonium sulphate, which one is more suitable for the growth of
plants? Prove it.
[Relative atomic mass: H,1; C,12; N,14; O,16; S,32]
2
Gas A
Gas B
Ammonia Ammonium Salt
3. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
3 A bicycle is made up of various parts, as shown in Diagram 2
(a) The frame of the bicycle is made of steel. What elements does steel consist of?
………………………………………………………………………………………………
[1 mark]
(b) Draw the arrangement of atoms in steel.
[2 marks]
(ii) Steel is strong but is not suitable to be used for the wheel rim of a racing bicycle. Why?
…………………….………………………………………………………………………...
[1 mark]
3
Wheel rim/
Rim tayar
Frame/
DIAGRAM 3
4. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
4 Diagram 3 shows the result of the diameter of dent that obtained in an experiment to
compare the hardness of iron and its alloy.
DIAGRAM 4
The results are shown in Table 4
Reading
1 2
Average
Diameter of dent on iron block (cm)
0.25 0.27
Diameter of dent on iron alloy block (cm) 0.15 0.13
TABLE 3
(a) Name one alloy that contains iron metal.
……………………………………………………………………………………………
[1 mark]
(b) Complete Table 4 by calculates the average of dent for both experiments.
……………………………………………………………………………………………
[1 mark]
(c)( i) What can be conclude from the results of the experiments?
……..…………………………………………………………………………………
[1 mark]
( ii) Explain your answer in (c)(i)
……….………………………………………………………………………………….
[2 marks]
(a) Draw the arrangement of atom in
4
Iron block or
alloy blockDiameter of dent
5. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
Iron metal Iron alloy
[2 marks]
5 Diagram 5 shows parts of a car made up of manufactured substances in industry.
(a) The car seat is covered with polyvinyl chloride, PVC a synthetic polymer. Name the monomer
of polyvinyl chloride.
…………………….………………………………………………………………………...
[1 mark]
(b) Explain how the usage of a synthetic polymers like PVC can give rise to enviromental
pollution problem.
…………………….………………………………………………………………………...
…………………….………………………………………………………………………...
[2 marks]
(c) The windscreen of the car is made of glass. There are four types of glass been used in our daily
lives. Complete the table below with the type of glass and its uses.
Type of glass Uses
Laboratory glassware
Lenses
Telescope mirrors
Optical fibres
Electrical bulb
Mirrors
Most kinds of glass container
Finest tableware
Art objects
Borosilicate glass
Cookware
Laboratory glassware
Automobile headlights
Glass pipelines
[2 marks]
(d) Borosilicate glass is excellent for cookware and laboratory glassware like boiling tube, beaker
and conical flask. State one special property of borosilicate glass.
5
PVC seat cover
Glass windscreen
DIAGRAM .5
6. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
…………………….………………………………………………………………………...
[1 mark]
6 Table 6 shows the particulars of four different types of manufactured substances
in industry.
Types Examples Components
Glass Borosilicate Silicon dioxide, sodium oxide, calcium oxide and X
Polymer Z Vinyl chloride
Alloy Bronze Copper and Y
Composite
material
W
Concrete (cement, sand and small pebbles) and
steel
TABLE 6
(a) X is a part of the borosilicate glass. What is X?
......................................................................................................................................................
.
[1 mark]
(b) (i) Identify Y.
..............................................................................................................................................
[1 mark]
(ii) Bronze is harder than pure copper. Explain why.
..............................................................................................................................................
..............................................................................................................................................
[2 marks]
(c) The following diagram shows a part of molecular structure of a compound Z.
H Cl H Cl H Cl
C C C C C C
H H H H H H
(i) Draw the structure of its monomer.
[1 mark]
(ii) Compound Z is often used as a water pipe. State one advantage of this type
of pipe as compared to metal pipes.
..............................................................................................................................................
[1mark]
(d) W can withstand high pressure and can support very heavy loads.
6
7. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
What is W?
.....................................................................................................................................................
[1mark]
7 (a) Glass and ceramic are widely used in our daily life.
(i) Name a chemical of the main component of glass and ceramic
…………………………………………………………………………….........................................
[1 mark]
(ii) State a reason why glass is used as laboratory apparatus instead of metal.
…………………………………………………………………………….........................................
[1 mark]
(b)
Test tube Beaker Combustion tube
DIAGRAM 7
State the type of glass that used in making the apparatus in Diagram 6
……………………………………………………………………………..................
[1 mark]
(c) Photo chromic glass is a composite material.
(i) What is composite material?
……………………………………………………………………………..................
[1 mark]
(ii) Name one of the component in photo chromic glass?
……………………………………………………………………………..................
[1 mark]
(iii) State one of the characteristic of lenses made from photo chromic glass.
……………………………………………………………………………..................
[1 mark]
7
8. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
8 Figure 8 shows an industrial preparation of sulphuric acid by the Contact Process.
Figure 8
(a) Write the chemical equation for the reaction in stage III and write the
name of the catalyst in this process.
[3 marks]
(b) Sulphur trioxide at stage three cannot directly adding water to produce sulphuric
acid in industry , explain why
[4 marks].
(c) Sulphur dioxide is one of the by-products of the Contact Process and also are
release from the burning of fossil fuels. Explain how sulphur dioxide causes
environmental pollution.
[9 marks]
9 (a) Aeroplane is made from an alloy of aluminium.
What is the name of this alloy? Explain why the low density aluminium is not
suitable for building aeroplane.
[3 marks]
(b) Bronze is an alloy of copper. Diagram 9 shows the arrangement of atoms in pure
copper and bronze.
Diagram 9
(i) Name the atom X.
[ 1 mark]
8
Copper atom Atom X
Stage I Stage II Stage III Stage IV
S SO2 SO3 H2S2O7 H2SO4
Oxygen Oxygen Concentrated Water
Sulphuric acid
9. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
(ii) Explain why bronze is harder than pure copper.
[6 marks]
ANSWER
1 (a) Contact process 1
(b) Sulphur dioxide, SO2 1
(c) Temperature: 450o
C 1
Pressure; 1 atm 1
Catalyst: Vanadium(V) oxide 1
(d) SO3 + H2SO4 H2S2O7 1
(e) Fertilisers/ paint/ detergents/ fibres/ electrolytes 2
(f) (i) glass fibres and plastic 1
(ii) high tensile strength 1..10
9
10. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
3 (a) (i) Iron and carbon
1
(ii)
[ Suitable diagram ] 1
[ Label iron & carbon atom] 1……….. 2
(iii) heavy 1
4 (a) steel, stainless steel 1
(b) 0.26, 0.14 1
(c) (i) iron alloy is harder than iron metal 1
(ii) The presence of foreign atom in iron alloy
will reduce the layer of atom from sliding on each other.
1
1
(d)
At least 3 layers of atoms contain 3 atoms each layer
2
10
Iron atom
Carbon
atom
11. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
5 (i) Chloroethene // Vinylchloride 1
(ii) Not easily biodegradable 1
Cause blockage of drainage systems / flash floods 1
OR
Give out harmfull / poisonous / toxic gases 1
Cause air pollution 1 ………….2
(iii)
Type of glass Uses
Fused glass
Soda-lime glass
Lead crystal glass
[ All correct 2 marks
2 correct 1 mark
1 correct 0 mark ]
2
(iv) Low thermal expension coefficient // High heat-resistant 1
11
12. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
6 (a)
(b) (i)
(ii)
(c) (i)
(ii)
(d)
(e) (i)
(ii)
Boron oxide
Tin
1. The presence of tin atoms of different size from the atoms of
copper distrupts the orderly arrangements of copper atoms
2. This prevents the layers of atoms from sliding over one another
easily
H Cl
| |
C == C
| |
H H
Does not corrode
Reinforced concrete
2NH3 + H2SO4 → (NH4)2SO4//
2NH4OH + H2SO4 → (NH4)2SO4 + 2H2O
% N in CO(NH2)2 = %67.46%100
60
)14(2
=×
% N in (NH4)2SO4 = %21.21100
132
)14(2
=×
Urea has higher percentage of nitrogen so it is more suitable for the
growth of plants
1
1
1
1
1
1
1
1
1
1
1…11
12
13. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
7 (b) (i) silicon dioxide 1
(ii) inert towards chemicals 1
(iii) Borosilicate glass 1
(c) (i) Structural material that is formed by combining two or more
different subtances. 1
(ii) silver bromide / Copper(I) chloride 1
(iii) darken when exposed to sunlight
8 (c) SO3 + H2SO4 → H2S2O7
reactant - 1m
product – 1m 2m
Vanadium (V) oxide 1m
(d) Reacts too violently with water 1m
produce a lot of heat 1m
Produce a large cloud of sulphuric acid mist 1m
The mist will pollutes the air / corrosive 1m
(e)Sulphur dioxide gas is soluble in rain water and forms acid rain 1m
Acid rain corrodes buildings and metal structures 1m
Acid rain flows into lakes and river 1m
Lakes and river become acidic 1m
Fish and other aquatic organisms die 1m
pH of soils decreases 1m
Plants die of malnutrition 1m
Acid rain destroys trees 1m
Sulphur dioxide causes respiratory problems in human 1m
13
14. Chemistry Worksheet – Revision on Form 4 Topic : Manufactured Substances in Industry
9 (a) Duralumin
Aluminium is soft /easily dented / cannot withstands pressure
(Any two correct answers)
1
2 3
7(b)(i)
(ii)
Tin
In pure copper,
• atoms are of the same size
• atoms are orderly arranged in layers
• the layers of atoms can slide over each one another when a force is
apply
In bronze,
• atoms of tin and copper have different size
• the presence of tin atoms disrupt the orderly arrangement of the
copper atoms.
• The layers of copper atoms are prevented from sliding over each
other easily.
1
1
1
1
1
1
1 7
14