This document consists of a chemistry exam paper with multiple choice questions testing knowledge of chemistry concepts and principles. The 18 page document includes 40 multiple choice questions testing topics such as the structure of atoms, chemical bonding, periodic table properties, reactions and equations. It also provides instructions for candidates on how to complete the exam and includes a periodic table for reference.
The document discusses key concepts relating to species, populations, and ecological niches. It defines a species and explains factors that influence populations like biotic and abiotic interactions. Population growth is described using S-curve and J-curve models, showing exponential then limited growth as carrying capacity is approached. Ecological niches are influenced by both fundamental and realized factors, and examples of population interactions like competition and predation are provided.
Science is a way of learning about the natural world through observation and questioning. It uses theories and laws to explain patterns seen in nature. Theories can change as new evidence is discovered, while laws simply describe patterns that never fail. Science is divided into life science, earth science, and physical science, each studying different natural systems and their interactions. Technology applies scientific knowledge for practical uses.
There are three main processes of heat transfer: conduction, convection, and radiation. Conduction involves the transfer of heat through direct contact of particles. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the transfer of heat by electromagnetic waves and does not require a medium. Good conductors allow for rapid conduction, while insulators inhibit conduction. Convection currents transfer heat in fluids and gases. Radiation occurs through the emission and absorption of infrared waves and is affected by surface properties.
1) Evaporation occurs when molecules near the surface of a liquid gain enough kinetic energy to escape, reaching an equilibrium when an equal number return. The boiling point of a liquid is reached when its vapor pressure equals atmospheric pressure.
2) The boiling point of water is 100°C at sea level but varies with altitude and pressure. Raising or lowering pressure by 28 mmHg changes the boiling point 1°C.
3) Thermal expansion causes the volumes of materials to increase with temperature. The degree of expansion varies between materials like brass and steel.
The document discusses key concepts relating to species, populations, and ecological niches. It defines a species and explains factors that influence populations like biotic and abiotic interactions. Population growth is described using S-curve and J-curve models, showing exponential then limited growth as carrying capacity is approached. Ecological niches are influenced by both fundamental and realized factors, and examples of population interactions like competition and predation are provided.
Science is a way of learning about the natural world through observation and questioning. It uses theories and laws to explain patterns seen in nature. Theories can change as new evidence is discovered, while laws simply describe patterns that never fail. Science is divided into life science, earth science, and physical science, each studying different natural systems and their interactions. Technology applies scientific knowledge for practical uses.
There are three main processes of heat transfer: conduction, convection, and radiation. Conduction involves the transfer of heat through direct contact of particles. Convection involves the transfer of heat by the circulation of fluids like gases and liquids. Radiation involves the transfer of heat by electromagnetic waves and does not require a medium. Good conductors allow for rapid conduction, while insulators inhibit conduction. Convection currents transfer heat in fluids and gases. Radiation occurs through the emission and absorption of infrared waves and is affected by surface properties.
1) Evaporation occurs when molecules near the surface of a liquid gain enough kinetic energy to escape, reaching an equilibrium when an equal number return. The boiling point of a liquid is reached when its vapor pressure equals atmospheric pressure.
2) The boiling point of water is 100°C at sea level but varies with altitude and pressure. Raising or lowering pressure by 28 mmHg changes the boiling point 1°C.
3) Thermal expansion causes the volumes of materials to increase with temperature. The degree of expansion varies between materials like brass and steel.
This document discusses structures and engineering concepts. It will teach the reader to identify different types of structures, explain why structure designs change over time and why structures fail. It will also explain what civil engineers do and describe the different forces that act on structures. The document discusses strengthening beams, joining solid structures, stability, and designing an arch bridge model.
- The first geologic time scale was proposed in 1913 by British geologist Arthur Holmes, estimating Earth's age at around 4 billion years old, much older than previously believed.
- Geologists have divided Earth's history into time intervals of varying lengths marked by significant geological or biological events, such as mass extinctions.
- The time scale includes eons like the Phanerozoic Eon which are hundreds of millions of years long and divided into eras like the Cenozoic, Mesozoic and Paleozoic marked by very significant events. Eras are further divided into periods which are also defined by boundary events.
The document outlines the geological time scale which is used to describe the 4.6 billion year history of Earth. It is divided into eons, eras, periods, and epochs based on studying rock layers and fossil records. The current eon is the Phanerozoic which began over 541 million years ago and is divided into the Paleozoic, Mesozoic, and Cenozoic eras describing the rise of ancient life, age of reptiles, and modern life including mammals respectively. The document provides details on the major life forms and events of each period within these eras.
The document discusses different methods for generating electricity, including fossil fuels, nuclear, renewable sources, and their advantages and disadvantages. It also describes the key components and functioning of the national power grid, including how electricity is distributed from power stations to consumers via transformers which increase or decrease voltage to reduce energy losses during transmission.
Department Of Computer Application- Energy and its Form
Types of Energy
Forms of Energy
Radiant Energy
Electrical
Chemical
Sound
Thermal
Nuclear
Mechanical
Magnetic
Potential Energy
Law of Conservation of Energy
Here are the steps Jake can take to find the density of the book using the tools he has:
1. Use the balance to measure the mass of the book. Let's say it's 1,000 grams.
2. Use the ruler to measure the dimensions of the book - its length, width, and height.
3. Calculate the volume of the book by multiplying its length by its width by its height. For example, if the book is 20 cm long, 10 cm wide, and 2 cm thick, its volume would be 20 cm x 10 cm x 2 cm = 400 cm3.
4. Use the density formula: Density = Mass / Volume
5. Plug in the values:
Cambridge igcse biology ( 2016 2018) classification of living organismsMr Tarek Saad Ibrahim
This document discusses the key characteristics of living organisms and methods of biological classification. It describes the characteristics of movement, respiration, sensitivity, growth, reproduction, excretion and nutrition that define life. It also explains the concepts of classification, putting organisms into groups based on similarities, and the binomial naming system. Specific phyla and classes within the animal and plant kingdoms are outlined, along with the distinctive features of fungi, protoctista, prokaryotes, viruses and different types of plants and animals.
Here are the key points about the relationship between the lynx and snowshoe hare populations:
1. The populations move in opposite cycles - when one is high, the other is low, and vice versa. This is known as a predator-prey relationship.
2. The lynx population follows the hare population with a time lag. When hare numbers are high, there is plenty of food for lynx, so the lynx population grows. However, as lynx numbers increase, they consume more hares. Eventually hare numbers crash from overpredation, then the lynx population crashes due to lack of food.
3. The lynx are clearly the
Waves transfer energy from one place to another through a disturbance or vibration in a medium. There are different types of waves including transverse waves, longitudinal waves, and surface waves which move media in different directions relative to the wave propagation. Waves are classified based on how the medium moves as the wave passes through.
This document provides an overview of the scientific method process, including:
1) Observation and forming a testable question, which should have one variable and measurable outcomes.
2) Developing a hypothesis in an "if...then...because" format to make an educated guess about what will happen during the experiment.
3) Designing and performing an experiment to test the hypothesis by manipulating the variable and collecting objective data.
4) Analyzing the results to determine if the hypothesis was supported or needs revising, and drawing a conclusion.
This document defines key concepts related to heat and temperature. It explains that heat is the total energy of molecular motion in a substance, while temperature is a measure of the average energy of molecular motion. Temperature does not depend on size or type of object, unlike heat, which depends on speed, number and type of particles. While heat increases or decreases temperature, temperature is a measure of how fast molecules are moving on average - higher temperatures mean faster movement. The document also defines atoms, molecules, elements and compounds.
Thermodynamics deals with energy transfer between systems and states of matter. The first law of thermodynamics states that energy is conserved, while the second law introduces entropy and establishes that the entropy of the universe increases over time. Thermodynamics can determine if a reaction will proceed spontaneously based on the energy change and entropy change between reactants and products. A reaction is spontaneous if the change in internal energy is negative and the change in entropy is positive.
1) Temperature is defined as the average kinetic energy of air molecules, with higher temperatures indicating faster moving molecules. Different temperature scales are discussed, including Fahrenheit, Celsius, and Kelvin.
2) Heat is the transfer of energy that changes an object's temperature, with specific heat referring to the amount of heat needed to change an object's temperature. Water has a specific heat of 1.0.
3) Latent heat is the energy required for phase changes between solid, liquid, and gas, such as melting or evaporation. Latent heat drives thunderstorms and hurricanes.
AP Biology Animal Form and Function Ch. 33Stephanie Beck
The document describes the basics of animal form and function. It discusses how physical laws and the environment constrain animal size and shape. It also explains how organisms maintain homeostasis through various mechanisms at the cellular, tissue, organ, and organ system levels. Animals obtain energy from food which is processed through ingestion, digestion, absorption, and elimination in the digestive system. Homeostatic mechanisms regulate nutrients and energy usage.
This document contains the mark scheme for the May/June 2008 International General Certificate of Secondary Education (IGCSE) Chemistry exam. It lists the questions from the multiple choice exam paper and provides the key or correct answer for each question. There are 40 questions total and the correct answers are identified by letters A-D. The mark scheme is published by the University of Cambridge International Examinations to aid in evaluating student responses on the multiple choice exam.
This document consists of a biology exam with multiple choice questions. It provides instructions for exam takers, including writing in soft pencil, bubbling answers on an answer sheet, and not using staples or correction fluid. The exam contains 40 multiple choice questions about biology topics like cells, plants, animals, ecology, and genetics.
This document is a 12-page chemistry exam consisting of multiple choice and free response questions. It tests knowledge of topics including carbon monoxide detection, photosynthesis, combustion of propane, extraction of metals like zinc and sulfur, and acid-base reactions. The exam provides space for students to write their answers and includes a periodic table as a reference. It instructs students to answer all questions and write their responses on the exam paper.
This document is a chemistry exam paper that consists of 7 questions testing knowledge of various chemistry concepts. It provides instructions for candidates on how to answer the questions, including writing in boxes provided and not writing in barred code or grey areas. It also lists the number of marks allocated for each question or part of a question. Finally, it states that the exam paper is made up of 14 printed pages and 2 blank pages.
1. This document is an exam paper for the International General Certificate of Secondary Education (IGCSE) Chemistry exam. It consists of 40 multiple choice questions about various chemistry concepts.
2. The questions cover topics such as the particulate nature of matter, atomic structure, bonding, energetics, kinetics, equilibria and organic chemistry. Experimental techniques such as chromatography, crystallization, titration and electrolysis are also assessed.
3. Students are asked to choose the correct answer from options A, B, C or D for each question based on their knowledge of chemistry fundamentals and practical skills. A copy of the periodic table is provided to aid answering questions involving elements.
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 discusses structures and engineering concepts. It will teach the reader to identify different types of structures, explain why structure designs change over time and why structures fail. It will also explain what civil engineers do and describe the different forces that act on structures. The document discusses strengthening beams, joining solid structures, stability, and designing an arch bridge model.
- The first geologic time scale was proposed in 1913 by British geologist Arthur Holmes, estimating Earth's age at around 4 billion years old, much older than previously believed.
- Geologists have divided Earth's history into time intervals of varying lengths marked by significant geological or biological events, such as mass extinctions.
- The time scale includes eons like the Phanerozoic Eon which are hundreds of millions of years long and divided into eras like the Cenozoic, Mesozoic and Paleozoic marked by very significant events. Eras are further divided into periods which are also defined by boundary events.
The document outlines the geological time scale which is used to describe the 4.6 billion year history of Earth. It is divided into eons, eras, periods, and epochs based on studying rock layers and fossil records. The current eon is the Phanerozoic which began over 541 million years ago and is divided into the Paleozoic, Mesozoic, and Cenozoic eras describing the rise of ancient life, age of reptiles, and modern life including mammals respectively. The document provides details on the major life forms and events of each period within these eras.
The document discusses different methods for generating electricity, including fossil fuels, nuclear, renewable sources, and their advantages and disadvantages. It also describes the key components and functioning of the national power grid, including how electricity is distributed from power stations to consumers via transformers which increase or decrease voltage to reduce energy losses during transmission.
Department Of Computer Application- Energy and its Form
Types of Energy
Forms of Energy
Radiant Energy
Electrical
Chemical
Sound
Thermal
Nuclear
Mechanical
Magnetic
Potential Energy
Law of Conservation of Energy
Here are the steps Jake can take to find the density of the book using the tools he has:
1. Use the balance to measure the mass of the book. Let's say it's 1,000 grams.
2. Use the ruler to measure the dimensions of the book - its length, width, and height.
3. Calculate the volume of the book by multiplying its length by its width by its height. For example, if the book is 20 cm long, 10 cm wide, and 2 cm thick, its volume would be 20 cm x 10 cm x 2 cm = 400 cm3.
4. Use the density formula: Density = Mass / Volume
5. Plug in the values:
Cambridge igcse biology ( 2016 2018) classification of living organismsMr Tarek Saad Ibrahim
This document discusses the key characteristics of living organisms and methods of biological classification. It describes the characteristics of movement, respiration, sensitivity, growth, reproduction, excretion and nutrition that define life. It also explains the concepts of classification, putting organisms into groups based on similarities, and the binomial naming system. Specific phyla and classes within the animal and plant kingdoms are outlined, along with the distinctive features of fungi, protoctista, prokaryotes, viruses and different types of plants and animals.
Here are the key points about the relationship between the lynx and snowshoe hare populations:
1. The populations move in opposite cycles - when one is high, the other is low, and vice versa. This is known as a predator-prey relationship.
2. The lynx population follows the hare population with a time lag. When hare numbers are high, there is plenty of food for lynx, so the lynx population grows. However, as lynx numbers increase, they consume more hares. Eventually hare numbers crash from overpredation, then the lynx population crashes due to lack of food.
3. The lynx are clearly the
Waves transfer energy from one place to another through a disturbance or vibration in a medium. There are different types of waves including transverse waves, longitudinal waves, and surface waves which move media in different directions relative to the wave propagation. Waves are classified based on how the medium moves as the wave passes through.
This document provides an overview of the scientific method process, including:
1) Observation and forming a testable question, which should have one variable and measurable outcomes.
2) Developing a hypothesis in an "if...then...because" format to make an educated guess about what will happen during the experiment.
3) Designing and performing an experiment to test the hypothesis by manipulating the variable and collecting objective data.
4) Analyzing the results to determine if the hypothesis was supported or needs revising, and drawing a conclusion.
This document defines key concepts related to heat and temperature. It explains that heat is the total energy of molecular motion in a substance, while temperature is a measure of the average energy of molecular motion. Temperature does not depend on size or type of object, unlike heat, which depends on speed, number and type of particles. While heat increases or decreases temperature, temperature is a measure of how fast molecules are moving on average - higher temperatures mean faster movement. The document also defines atoms, molecules, elements and compounds.
Thermodynamics deals with energy transfer between systems and states of matter. The first law of thermodynamics states that energy is conserved, while the second law introduces entropy and establishes that the entropy of the universe increases over time. Thermodynamics can determine if a reaction will proceed spontaneously based on the energy change and entropy change between reactants and products. A reaction is spontaneous if the change in internal energy is negative and the change in entropy is positive.
1) Temperature is defined as the average kinetic energy of air molecules, with higher temperatures indicating faster moving molecules. Different temperature scales are discussed, including Fahrenheit, Celsius, and Kelvin.
2) Heat is the transfer of energy that changes an object's temperature, with specific heat referring to the amount of heat needed to change an object's temperature. Water has a specific heat of 1.0.
3) Latent heat is the energy required for phase changes between solid, liquid, and gas, such as melting or evaporation. Latent heat drives thunderstorms and hurricanes.
AP Biology Animal Form and Function Ch. 33Stephanie Beck
The document describes the basics of animal form and function. It discusses how physical laws and the environment constrain animal size and shape. It also explains how organisms maintain homeostasis through various mechanisms at the cellular, tissue, organ, and organ system levels. Animals obtain energy from food which is processed through ingestion, digestion, absorption, and elimination in the digestive system. Homeostatic mechanisms regulate nutrients and energy usage.
This document contains the mark scheme for the May/June 2008 International General Certificate of Secondary Education (IGCSE) Chemistry exam. It lists the questions from the multiple choice exam paper and provides the key or correct answer for each question. There are 40 questions total and the correct answers are identified by letters A-D. The mark scheme is published by the University of Cambridge International Examinations to aid in evaluating student responses on the multiple choice exam.
This document consists of a biology exam with multiple choice questions. It provides instructions for exam takers, including writing in soft pencil, bubbling answers on an answer sheet, and not using staples or correction fluid. The exam contains 40 multiple choice questions about biology topics like cells, plants, animals, ecology, and genetics.
This document is a 12-page chemistry exam consisting of multiple choice and free response questions. It tests knowledge of topics including carbon monoxide detection, photosynthesis, combustion of propane, extraction of metals like zinc and sulfur, and acid-base reactions. The exam provides space for students to write their answers and includes a periodic table as a reference. It instructs students to answer all questions and write their responses on the exam paper.
This document is a chemistry exam paper that consists of 7 questions testing knowledge of various chemistry concepts. It provides instructions for candidates on how to answer the questions, including writing in boxes provided and not writing in barred code or grey areas. It also lists the number of marks allocated for each question or part of a question. Finally, it states that the exam paper is made up of 14 printed pages and 2 blank pages.
1. This document is an exam paper for the International General Certificate of Secondary Education (IGCSE) Chemistry exam. It consists of 40 multiple choice questions about various chemistry concepts.
2. The questions cover topics such as the particulate nature of matter, atomic structure, bonding, energetics, kinetics, equilibria and organic chemistry. Experimental techniques such as chromatography, crystallization, titration and electrolysis are also assessed.
3. Students are asked to choose the correct answer from options A, B, C or D for each question based on their knowledge of chemistry fundamentals and practical skills. A copy of the periodic table is provided to aid answering questions involving elements.
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.
The document discusses the use of variant question papers for some of CIE's most popular assessments. It explains that CIE uses two closely related variants of some question papers to provide more past examination material to students. For each variant, there is a corresponding mark scheme and examiner's report. The document contains both variants of the materials so that all centers have access to them. It provides guidance on how to identify which variant a particular paper belongs to based on labels at the top of the page. Anyone with additional questions should contact CIE's customer service team.
The document discusses the properties and reactivity of metals. It describes experiments to determine the reactivity series of metals by observing their reactions with water, steam, and dilute acids. Metals react differently in each test based on their positions in the reactivity series, from most reactive to least reactive. The reactivity series allows prediction of other reactions like reduction of metal oxides and decomposition of metal carbonates.
This document consists of a chemistry exam for the International General Certificate of Secondary Education. The exam contains 40 multiple choice questions covering various topics in chemistry including elements, compounds, chemical reactions, and experimental procedures. It also includes a periodic table of elements printed on page 20 for reference during the exam. The exam is 45 minutes long and students are to record their answers on an answer sheet provided.
This document consists of 15 printed pages and 1 blank page related to a chemistry exam. The exam covers topics such as the periodic table, chemical formulas and equations, and chemical reactions. It provides multiple choice questions to test understanding of these chemistry concepts.
This document consists of 15 printed pages and 1 blank page related to a chemistry exam. The exam covers topics such as the periodic table, chemical equations, and chemical reactions. It provides multiple choice questions to test understanding of these chemistry concepts.
This 15-page document appears to be part of an exam for the International General Certificate of Secondary Education in Chemistry. The exam contains 40 multiple choice questions covering various topics in chemistry such as the periodic table, chemical bonding, electrolysis, and chemical reactions. It includes a copy of the periodic table on page 16 for reference.
This document is a 19-page chemistry exam consisting of multiple choice questions. It includes a periodic table and instructions to answer 40 questions in 45 minutes by choosing the correct answer and recording it on an answer sheet. The exam covers topics like chemical reactions, properties of elements, acids and bases, and organic chemistry.
This 16-page document appears to be part of an exam for the International General Certificate of Secondary Education in Chemistry. It contains 40 multiple choice questions testing concepts in chemistry such as the periodic table, chemical bonding, acids and bases, and chemical reactions. It also includes a periodic table as a reference.
This document consists of a multiple choice chemistry exam with 40 questions testing knowledge of chemistry concepts and principles. It provides the exam instructions, questions, answer choices, and a periodic table for reference. The exam covers topics including properties of gases and liquids, chemical equations, acid-base reactions, electrolysis, and the extraction and uses of metals.
This document provides information about an International General Certificate of Secondary Education (IGCSE) chemistry exam, including instructions for the multiple choice exam, details about the exam format and timing, and a reminder that the periodic table is provided. The exam consists of 40 multiple choice questions testing students' knowledge of chemistry concepts ranging from chemical bonding to acid-base reactions to the reactivity series. Calculators are permitted and rough work should be done in the exam booklet.
Ba
137
Strontium
38
Rb
Rubidium
44
Sr
88
Potassium
19
K
39
Magnesium
12
Mg
24
Calcium
20
Ca
40
This document consists of (1) a chemistry exam with multiple choice questions testing knowledge of concepts such as electrolysis, chemical reactions, and the periodic table and (2) a periodic table. The exam tests understanding of fundamental chemistry concepts through 40 multiple choice questions.
Ba
137
Strontium
38
Rb
Rubidium
44
Sr
88
Potassium
19
K
39
Magnesium
12
Mg
24
Calcium
20
Ca
40
This document consists of (1) a chemistry exam with multiple choice questions testing knowledge of chemistry concepts and principles, (2) a periodic table, and (3) printed information about the exam.
1. The document is a 15-page syllabus approved for use in teaching chemistry in several countries.
2. It includes information such as the document page count and reference codes.
3. The blank page is likely included for notes.
1. The document is an exam for the International General Certificate of Secondary Education in Chemistry. It consists of 40 multiple choice questions testing students' knowledge of chemistry concepts and experiments.
2. The questions cover topics like chemical reactions, compounds, elements, acids and bases, the periodic table, and industrial processes. Students are asked to identify apparatus, interpret chemical equations and diagrams, and apply their understanding of chemistry principles.
3. To earn marks, students must choose the single best answer for each question, recording their responses on an answer sheet within the allotted 45 minutes. Working through the exam tests students' comprehension of fundamental chemistry ideas and their ability to apply critical thinking to multiple choice questions.
1. The document is an exam for the International General Certificate of Secondary Education in Chemistry. It consists of 40 multiple choice questions testing students' knowledge of chemistry concepts and experiments.
2. The questions cover topics like chemical reactions, compounds, acids and bases, the periodic table, and industrial processes. Students are asked to identify apparatus, interpret chemical equations and diagrams, and apply their understanding of chemistry principles.
3. The exam provides a periodic table for reference and allows the use of a calculator. It aims to comprehensively assess students' mastery of introductory chemistry concepts and skills.
The document provides a multiple choice chemistry exam with 40 questions covering topics like the periodic table, chemical bonding, acids and bases, redox reactions, and organic chemistry. It includes a periodic table as a reference. Students are instructed to choose the single best answer for each question and record their responses on an answer sheet within 45 minutes.
This 15-page document appears to be part of an exam for the International General Certificate of Secondary Education in Chemistry. It contains 40 multiple choice questions about various chemistry concepts. The questions cover topics like chemical reactions, compounds, elements, acids and bases, and industrial processes.
This document consists of a chemistry exam with multiple choice questions covering various topics in chemistry including the periodic table, chemical bonding, reactions, and organic chemistry. It provides instructions for students to answer 40 multiple choice questions in 45 minutes by choosing the correct answer and recording it on an answer sheet. A copy of the periodic table is provided for reference.
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 is an exam for the International General Certificate of Secondary Education in Chemistry. It consists of 40 multiple choice questions testing students' knowledge of chemistry concepts. The exam covers topics including the particle nature of matter, acids and bases, redox reactions, organic chemistry, and the periodic table. It provides context for summarizing key chemistry ideas assessed on the exam.
The document contains a chemistry exam with 40 multiple choice questions covering topics such as the periodic table, chemical bonding, acids and bases, redox reactions and organic chemistry. Students are provided with a periodic table and instructed to choose the single best answer for each question, recording their responses on an answer sheet. The exam is designed to test students' understanding of fundamental chemistry concepts.
This document is a 17-page exam for the International General Certificate of Secondary Education in Chemistry. It contains 40 multiple choice questions testing various concepts in chemistry. The exam includes questions about the periodic table, chemical reactions, acids and bases, metals and alloys, air pollution, and more. Students have 45 minutes to complete the exam.
Deserts are expanding across large parts of the world due to various human and environmental factors. Overgrazing of livestock and deforestation have degraded soils, reducing their ability to retain water. Climate change has exacerbated droughts in many regions, reducing rainfall and causing desertification. As deserts expand, they threaten the livelihoods of those living in increasingly arid lands and could contribute to conflicts if populations are forced to migrate. Understanding and addressing the root causes, such as sustainable land management practices and reducing greenhouse gas emissions, is essential to slow the spread of deserts.
This friendship is rare and special. The friends have laughed together, cried together, and helped each other through difficult times. They share secrets without shame and tell each other the truth, even when at fault. The thought of the friendship ending makes one sad, but they take comfort in their memories. Though distance may separate them, their close bond of friendship remains in their hearts.
This friendship is rare and special. The friends have laughed together, cried together, and helped each other through difficult times. They share secrets without shame and tell each other the truth, even when at fault. The thought of the friendship ending makes one sad, but they take comfort in their memories. Though distance may separate them, their close bond of friendship remains in their hearts.
This document contains the same URL, www.communication4all.co.uk, repeated six times without any other text or context. The URL www.communication4all.co.uk is mentioned six consecutive times in the document.
This document contains the same URL, www.communication4all.co.uk, repeated six times without any other text or context. The URL www.communication4all.co.uk is mentioned six consecutive times in the document.
This document is a 13-page exam for the International General Certificate of Secondary Education in Biology. It contains 7 multiple choice questions testing knowledge of topics including food webs, human nutrition, plant and animal physiology, environmental issues, and genetics. The exam is designed to be completed in 1 hour and 15 minutes by writing answers directly on the question paper, with no additional materials allowed.
This document provides instructions for candidates taking the International General Certificate of Secondary Education Biology exam. It specifies that candidates should write their identification information on all work, use blue or black pen or pencil for diagrams, not use staples or correction fluid, answer all questions, and fasten all work together at the end. The exam consists of 13 printed pages, 3 blank pages, and 6 questions testing knowledge of biology topics including tissues, classification of organisms, response and control systems in humans and plants, hormones and disease, and population ecology.
This document is a 16-page exam for the International General Certificate of Secondary Education in Chemistry. It contains 7 multi-part chemistry questions testing knowledge of topics including the periodic table, atmospheric pollutants, acid-base reactions, extraction of metals, combustion reactions, organic compounds, and properties of group 1 and transition metals. It also includes a copy of the periodic table.
This document consists of a chemistry exam paper containing multiple choice and short answer questions testing knowledge of chemical apparatus, reactions, and experimental procedures. The questions cover topics such as identifying experimental set ups, describing chemical reactions and tests, planning investigations, analyzing results, and drawing conclusions from experiments.
This document consists of a 14 page chemistry exam with multiple choice and free response questions covering topics like the halogens, redox reactions, organic chemistry, acid-base reactions, and metals/alloys. It includes diagrams of lab setups and reagents/products. The exam provides space for students to show their work and includes a periodic table reference.
This document consists of three paragraphs summarizing the content of a 16-page biology exam. The exam contains multiple choice and short answer questions about fungi reproduction, acid rain, and sensitivity. It provides context about classifying fungi species, the effects of acid rain, and defining voluntary vs involuntary actions. Tables and figures are referenced to support analyzing trends in sulfur dioxide and sulfur concentrations over time.
This document consists of instructions and questions for a biology exam. It contains 12 pages, with the first 9 pages consisting of exam questions and the last 3 pages being blank. The exam has two sections - Section A contains short answer questions and Section B requires longer answers to two out of three essay questions. The questions cover topics in biology such as human reproduction, cell structure, genetics, the water cycle, osmosis, nutrition, and plant growth.
This document is a 19-page exam for the International General Certificate of Secondary Education (IGCSE) Biology exam. It contains 10 multiple choice and short answer questions covering topics like the respiratory system, photosynthesis, nutrient cycling, food webs, cell structure, genetics, and inherited conditions. Students are instructed to answer all questions directly on the exam paper and work is to be completed in 1 hour and 15 minutes.
1. This document consists of 17 printed pages and 3 blank pages for the Cambridge International Level 1/2 Certificate in Physics.
2. The document is approved for use in England, Wales and Northern Ireland and contains a multiple choice exam from October/November 2014 with 40 questions on topics related to physics.
3. Students are instructed to choose the correct answer for each question and record their choice on an answer sheet within 45 minutes, with each correct answer scoring one mark.
This document consists of a 16 page multiple choice exam for physics. It contains 40 multiple choice questions testing various concepts in physics such as motion, forces, energy, electricity, waves, and nuclear physics. The questions are accompanied by diagrams, graphs, and short paragraphs of information as context for the questions.
This document is a multiple choice exam for physics that contains 40 questions. It covers topics like mechanics, energy, waves, electricity, atomic physics, and more. The questions require analyzing diagrams, graphs, and scenarios to choose the best answer from four options (A, B, C, or D).
This document consists of a 20-page exam for the International General Certificate of Secondary Education in Physics. The exam contains 40 multiple choice questions testing various concepts in physics, including kinematics, forces, energy, waves, electricity, and radioactivity. The questions are presented over two columns on each page with answer choices A, B, C, or D provided.
This document is a 20 page exam for the International General Certificate of Secondary Education Physics exam. It contains 40 multiple choice questions testing various concepts in physics. The questions cover topics such as measurement, motion, forces, energy, electricity, waves, and radioactivity. Students have 45 minutes to complete the exam.
1. This document consists of 18 printed pages and 2 blank pages for a Cambridge International Level 1/Level 2 Certificate in Physics.
2. The document contains a multiple choice exam with 40 questions on topics related to physics. For each question there are four possible answers (A, B, C, D) and students must choose the one they consider correct.
3. The exam covers various concepts in physics including measurement, motion, energy, electricity, magnetism, waves, and radioactivity. Diagrams and tables are provided with some questions.
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdfMalak Abu Hammad
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
HCL Notes and Domino License Cost Reduction in the World of DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-and-domino-license-cost-reduction-in-the-world-of-dlau/
The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
- Reducing license cost by finding and fixing misconfigurations and superfluous accounts
- How do CCB and CCX licenses really work?
- Understanding the DLAU tool and how to best utilize it
- Tips for common problem areas, like team mailboxes, functional/test users, etc
- Practical examples and best practices to implement right away
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slackshyamraj55
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
Best 20 SEO Techniques To Improve Website Visibility In SERPPixlogix Infotech
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
Programming Foundation Models with DSPy - Meetup SlidesZilliz
Prompting language models is hard, while programming language models is easy. In this talk, I will discuss the state-of-the-art framework DSPy for programming foundation models with its powerful optimizers and runtime constraint system.
2. 2
1
The diagram shows how to obtain pure water from seawater.
Where do water molecules lose energy?
C
water out
water in
B
seawater
pure water
A
2
D
Bunsen flame
A solid metal is heated until it turns to vapour.
The graph shows the temperature of the metal during this process.
Which part of the graph shows the melting of the metal?
2200
D
temperature/°C
C
500
B
A
25
3
time
Some chemical compounds are purified by recrystallisation.
What can be used to test the purity of the crystals?
A
melting point
B
colour of crystals
C
size of crystals
D
solubility
0620/01/M/J/03
3. 3
4
What could be the melting point and boiling point of water containing a dissolved impurity?
melting point / oC
A
+3
96
B
+3
104
C
–3
96
D
5
boiling point / oC
–3
104
Which number in the table is –1?
particle
relative mass
electron
A
B
neutron
C
1
proton
6
charge
D
1
What is the electronic structure of an atom with a proton number 5 and a nucleon number 11?
A
7
1, 8, 2
B
2, 8, 1
C
D
3, 2
What changes when an ion is made from an atom?
A
the number of electrons only
B
the number of neutrons only
C
the number of protons only
D
8
2, 3
the number both of protons and of neutrons
Strontium, Sr, is a metal that forms an ionic chloride SrCl2.
Sulphur, S, is a non-metal that forms a covalent chloride SCl2.
Which compound is likely to have the higher melting point (m.p.) and which is more soluble in
water?
higher m.p.
more soluble
in water
A
SrCl2
SrCl2
B
SrCl2
SCl2
C
SCl2
SrCl2
D
SCl2
SCl2
0620/01/M/J/03
[Turn over
4. 4
9
The relative atomic mass of oxygen is 16 and that of hydrogen is 1.
This means that … (i) … of oxygen has the same mass as … (ii) … of hydrogen.
Which words correctly complete the gaps?
gap (i)
gap (ii)
A
an atom
thirty-two molecules
B
an atom
eight molecules
C
a molecule
sixteen atoms
D
a molecule
eight atoms
10 The diagram shows a model of a molecule containing carbon, hydrogen and oxygen.
How many atoms of each element are in the molecule?
carbon
hydrogen
oxygen
A
1
6
2
B
2
5
1
C
2
6
1
D
6
2
1
11 Water is formed when 48 g of oxygen combine with 6 g of hydrogen.
What mass of oxygen combines with 2 g of hydrogen?
A
12 g
B
16 g
C
0620/01/M/J/03
96 g
D
144 g
5. 5
12 The diagram shows how aluminium is manufactured by electrolysis.
anode (+ve)
cathode (–ve)
aluminium
oxide
dissolved in
cryolite
molten aluminium
What are the anode and cathode made of?
anode
cathode
A
aluminium
aluminium
B
aluminium
graphite
C
graphite
aluminium
D
graphite
graphite
13 A student sets up the apparatus shown. The bulb does not light.
bulb
electrode
water
After the student adds substance X to the water, the bulb lights.
What is X?
A
calcium carbonate
B
carbon
C
copper(II) sulphate
D
ethanol
0620/01/M/J/03
[Turn over
6. 6
14 The following elements have radioactive isotopes.
Which element is used as a source of energy because of its radioactivity?
A
carbon
B
hydrogen
C
iodine
D
uranium
15 When hydrogen is passed over a heated metal oxide, the metal and steam are formed.
metal oxide
excess of
hydrogen
burning
hydrogen
heat
What happens to the hydrogen and to the metal oxide?
hydrogen
metal oxide
A
oxidised
oxidised
B
oxidised
reduced
C
reduced
oxidised
D
reduced
reduced
0620/01/M/J/03
7. 7
16 When hydrated copper(II) sulphate is heated in the apparatus shown, solid X and liquid Y are
produced.
hydrated
copper(II) sulphate
heat
cold water
liquid Y
Which changes are noticed when liquid Y is added to cold solid X?
colour change
heat change
A
blue to white
heat given out
B
blue to white
heat taken in
C
white to blue
heat given out
D
white to blue
heat taken in
0620/01/M/J/03
[Turn over
8. 8
17 A solution of hydrogen peroxide releases oxygen slowly at room temperature.
hydrogen peroxide → water + oxygen
The diagrams show the effect of adding blood to the solution.
blood
bubbles
produced
rapidly
bubbles
produced
slowly
before adding blood
after adding blood
What could be the reason for the observed change?
A
Blood contains an enzyme.
B
Blood contains water.
C
The hydrogen peroxide becomes more concentrated.
D
The hydrogen peroxide is neutralised by blood.
0620/01/M/J/03
9. 9
18 A liquid X reacts with solid Y to form a gas.
Which two diagrams show suitable methods for investigating the speed of the reaction?
1
2
stopper
cotton wool
X
X
Y
Y
balance
balance
3
4
stopper
X
1 and 4
C
2 and 3
D
Y
1 and 3
B
X
Y
A
cotton wool
2 and 4
19 Which substance does not form copper(II) sulphate with warm, dilute sulphuric acid?
A
copper
B
copper(II) carbonate
C
copper(II) hydroxide
D
copper(II) oxide
0620/01/M/J/03
[Turn over
10. 10
20 Which test method and gas are correctly linked?
test method
gas
A
a lighted splint
oxygen
B
a glowing splint
hydrogen
C
damp litmus paper
chlorine
D
limewater
ammonia
21 Water is added to a test-tube containing dilute sulphuric acid of pH 4.
What could be the pH of the resulting solution?
A
8
B
6
C
4
D
2
22 Magnesium, on the left of Period Two of the Periodic Table, is more metallic than chlorine on the
right of this Period.
Why is this?
Magnesium has
A
fewer electrons.
B
fewer protons.
C
fewer full shells of electrons.
D
fewer outermost electrons.
23 An inert gas X is used to fill weather balloons.
Which descriptions of X are correct?
number of outer
electrons in atoms of X
structure of gas X
A
2
single atoms
B
2
diatomic molecules
C
8
single atoms
D
8
diatomic molecules
0620/01/M/J/03
11. 11
24 A student is asked to complete two sentences.
Metallic and non-metallic elements are classified in the … (i) … This can be used to … (ii) … the
properties of elements.
Which words correctly complete the gaps?
gap (i)
gap (ii)
A
Periodic Table
measure
B
Periodic Table
predict
C
reactivity series
measure
D
reactivity series
predict
25 Which material is an alloy that contains a non-metallic element?
A
brass
B
haematite
C
manganese
D
steel
26 The table gives information about the reactivity of three metals P, Q and R.
metal
reaction with air
reaction with steam reaction with dilute
hydrochloric acid
P
burns with sparks
forms an oxide
forms hydrogen
Q
slowly forms an oxide
no reaction
no reaction
R
slowly forms an oxide
no reaction
forms hydrogen
What is the order of reactivity of P, Q and R?
most reactive
→
least reactive
A
P
Q
R
B
P
R
Q
C
Q
R
P
D
R
Q
P
0620/01/M/J/03
[Turn over
12. 12
27 The bodies of aircraft are often made using aluminium.
Which two properties of aluminium make it suitable for this purpose?
property 1
property 2
A
good conductor of electricity
good conductor of heat
B
good conductor of electricity
strong
C
good conductor of heat
low density
D
strong
low density
28 Which raw materials are used in the manufacture of iron?
A
bauxite and lime
B
bauxite and limestone
C
haematite and lime
D
haematite and limestone
29 In a car industry, approximately 45 000 litres of water are required to produce a single car.
This water does not need to be very pure.
Which purification methods would be suitable and economic to use?
chlorinated
distilled
A
✓
✓
B
✓
✗
C
✗
✓
D
✗
✗
0620/01/M/J/03
13. 13
30 The pie-chart shows the composition of air.
3
2
1
What are the gases in parts 1, 2 and 3 of the pie-chart?
1
2
3
A
nitrogen
other gases
oxygen
B
nitrogen
oxygen
other gases
C
oxygen
other gases
nitrogen
D
oxygen
nitrogen
other gases
31 A steel works and a chemical works are built near to a city. The limestone buildings in the city
begin to crumble.
Which gas is most likely to cause this damage?
A
carbon dioxide
B
carbon monoxide
C
oxygen
D
sulphur dioxide
0620/01/M/J/03
[Turn over
14. 14
32 Which methods can be used to prevent the rusting of an iron girder of a bridge?
coat it with grease
electroplate it
paint it
A
✓
✓
✓
B
✓
✓
✗
C
✗
✓
✓
D
✗
✗
✓
33 A student heats a mixture of ammonium chloride and calcium hydroxide. She tests the gas given
off with damp red litmus paper.
What is the name of the gas and the final colour of the litmus paper?
gas
colour
A
ammonia
blue
B
ammonia
red
C
chlorine
red
D
chlorine
white
34 A newspaper article claims that carbon dioxide is formed as follows.
1
during respiration
2
when calcium carbonate reacts with hydrochloric acid
3
when methane burns in air
Which statements are correct?
A
1, 2 and 3
B
1 and 2 only
C
1 and 3 only
D
2 and 3 only
0620/01/M/J/03
15. 15
35 The diagram shows how the pH of an industrial waste changes when substance X is added to it.
7
pH
before X
is added
after X
is added
What is substance X?
A
coal
B
lime
C
salt
D
water
36 The diagram shows a model of an organic compound.
key
carbon atom
hydrogen atom
What is the name of this compound?
A
ethane
B
ethanoic acid
C
ethanol
D
ethene
0620/01/M/J/03
[Turn over
16. 16
37 Bitumen is a substance obtained from the fractional distillation of petroleum.
What are the boiling points and the sizes of the molecules in bitumen?
boiling points
sizes of molecules
A
high
large
B
high
small
C
low
large
D
low
small
38 Which hydrocarbons in the table are members of the same homologous series?
hydrocarbon
1
2
3
4
state at room
temperature
gas
gas
liquid
liquid
reaction with oxygen
burns
burns
burns
burns
aqueous reaction
with bromine
decolourises
bromine
no reaction
decolourises
bromine
no reaction
A
1 and 2
B
1 and 3
C
3 and 4
D
1, 2, 3 and 4
0620/01/M/J/03
17. 17
39 Which of the molecules shown can be polymerised?
H
A
H
C
H
H
H
C
H
C
H
H
H
C
H
B
H
H
C
C
H
H
C
H
H
H
D
H
C
O
C
H
O
H
40 Which conditions are necessary to ferment sugar into ethanol?
yeast
temperature/ °C
A
absent
30
B
absent
70
C
present
30
D
present
70
0620/01/M/J/03
20. 24
40
Sodium
Calcium
88
0620/01/M/J/03
Radium
45
89
Key
b
a
X
*
89
227
Actinium
Ac
b = proton (atomic) number
X = atomic symbol
a = relative atomic mass
†
72
Hafnium
Lanthanum
57
Hf
La
40
Zirconium
Zr
91
Titanium
178
Yttrium
Y
22
48
Ti
139
39
21
Scandium
Sc
*58-71 Lanthanoid series
†90-103 Actinoid series
88
Francium
87
Ra
226
Caesium
56
Barium
Cs
Fr
55
137
Ba
133
Strontium
Rubidium
38
Rb
37
Sr
85
20
Potassium
19
Ca
39
Magnesium
Na
12
Mg
23
Beryllium
4
Lithium
K
11
3
9
Be
7
II
Li
I
51
93
Ta
181
Niobium
Nb
90
58
73
52
96
Mo
W
184
141
Pa
Thorium
55
Tc
186
Re
144
Nd
92
60
Uranium
U
238
Neodymium
75
Rhenium
43
Technetium
25
Manganese
Mn
29
30
65
8
9
VII
2
0
Ru
101
Iron
190
Pm
Osmium
Os
Np
93
Neptunium
61
Promethium
76
44
Ruthenium
26
56
Fe
Sm
150
Iridium
Pu
94
Plutonium
62
Am
95
Americium
63
Europium
Eu
152
Platinum
Pt
78
195
Ir
46
Palladium
Pd
106
Nickel
Ni
192
Samarium
77
45
Rhodium
Rh
103
Cobalt
Co
Gd
157
Gold
Au
197
Silver
96
64
Curium
Cm
Gadolinium
79
47
Ag
108
Copper
Cu
201
Bk
Terbium
Tb
159
Mercury
Hg
97
Berkelium
65
80
48
Cadmium
Cd
112
Zinc
Zn
11
70
Dy
162
Thallium
Tl
204
Indium
Cf
98
Californium
66
Es
Holmium
Ho
165
Lead
Pb
207
Tin
99
Einsteinium
67
82
50
119
Sn
In
32
Germanium
Ge
73
Silicon
115
Gallium
Ga
Dysprosium
81
49
31
13
Aluminium
Si
Al
14
28
Carbon
27
Boron
12
C
14
75
Sb
122
Arsenic
As
Bi
209
Fermium
Fm
Erbium
Er
167
Bismuth
100
68
83
51
Antimony
33
15
Phosphorus
P
31
Nitrogen
N
Se
79
Sulphur
S
32
Oxygen
Po
169
Md
Thulium
Tm
101
Mendelevium
69
84
Polonium
52
Tellurium
Te
128
Selenium
34
16
16
O
Yb
173
Astatine
At
Iodine
I
127
Bromine
Br
80
Chlorine
No
102
Nobelium
70
Ytterbium
85
53
35
17
Cl
35.5
Fluorine
F
19
Lr
Lutetium
Lu
175
Radon
Rn
Xenon
Xe
131
Krypton
Kr
84
Argon
Ar
40
Neon
103
Lawrencium
71
86
54
36
18
10
Ne
20
Helium
Hydrogen
B
4
28
64
7
VI
He
27
59
6
V
H
59
5
IV
The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).
91
Protactinium
Th
232
Praseodymium
Cerium
59
Pr
Ce
74
Tungsten
42
Molybdenum
24
Chromium
Cr
140
Tantalum
41
23
Vanadium
V
1
III
1
Group
DATA SHEET
The Periodic Table of the Elements
20