The document discusses various topics related to metals and metallurgy. It begins by defining metals and metallurgical principles, then discusses alkali metals, alkaline earth metals, and their compounds. It also covers minerals, ores, concentration processes, smelting, electrolytic reduction, and refining of metals. Key concentration methods described are magnetic separation, gravity separation, froth flotation, and leaching. The document also differentiates between minerals and ores, discusses alloys, amalgams, and existence of metals. It provides an overview of metallurgy and the steps involved in the metallurgical process.
Chemical properties of p block elements .Momina Faheem
The document discusses the chemical properties of various p-block elements. It describes how elements within the groups react with substances like oxygen, hydrogen, halogens and metals. For example, it notes that aluminum burns in air if powdered, reacts with chlorine, and does not react with alkalis like sodium hydroxide at moderate temperatures. It also summarizes the reactions of group 13 (boron forms trihalides), group 14 (carbon remains unreactive with air), group 15 (nitrogen reacts with hydrogen to form ammonia), group 16 (oxygen readily forms compounds with most elements), group 17 (halogens react with hydrogen to form hydrogen halides) and group 18 elements (noble gases
The document contains 10 multiple choice questions about the hydrogen spectrum. It discusses that the essential condition to observe the hydrogen spectrum is high temperature and low pressure. The hydrogen spectrum appears as distinct lines, with the prominent line being red with a wavelength of 656 nm. It is an example of a line spectrum and can be recorded using a spectroscope. Robert Bunsen and Gustav Kirchhoff discovered the hydrogen spectrum and spectroscope, while Isaac Newton first discovered the word "spectrum".
The document provides information about grade 10 IGCSE chemistry content related to properties and reactions of metals. It discusses distinguishing metals from non-metals, reactivity series, extraction of metals like iron from ores, and uses of metals such as aluminum and zinc. It also describes physical and chemical properties of metals, structure and properties of alloys, and reactions of metals with water, steam, and acids to determine reactivity order.
This document provides an introduction to transition metal complexes. It discusses the aqueous chemistry of metal ions, including hydrolysis. Hexaaqua ions form when transition metals dissolve in water and are surrounded by six water molecules in an octahedral structure. Hydrolysis occurs when water molecules attack these complexes, removing protons and forming hydroxide ions. This makes the solution acidic. The document also discusses stability constants, which are equilibrium constants for the formation of complex ions from their constituent parts. Higher stability constants indicate more stable complexes.
- The document discusses various properties of metals such as aluminium being the most abundant metal, platinum being the most precious metal, and iron being the most usable metal. It also discusses properties of specific metals like lithium being the lightest metal and lead being the poorest conductor of heat.
- Metals are elements that form cations by losing electrons and exist as electropositive elements, except for hydrogen. Mercury is an example of a metal that exists in liquid form. Metal oxides are generally basic in nature.
- Alkali metals are the most reactive group of metals due to their large size and low ionization energy values. Properties like malleability, ductility and reactivity can also vary between
Le Châtelier's Principle states that if a stress is applied to a system at equilibrium, the system will adjust to partially counteract the stress and reach a new equilibrium position. Changes in concentration, pressure, volume, or temperature can act as stresses. For example, increasing the concentration of reactants will shift the equilibrium to the product side. A catalyst will speed the rate of both the forward and reverse reactions but will not change the equilibrium position or constant.
Metal complexes in therapeutic use of non chelated compoundssanjeevani kashyap
1. The document discusses various metal complexes that are used as therapeutic agents, including cisplatin, ruthenium complexes, and gold complexes which are used as anticancer agents.
2. Bismuth complexes are mentioned as being used as antimicrobial agents to treat conditions caused by H. pylori bacteria.
3. Early metal complexes mentioned include salvarsan, an arsenic-containing drug used to treat syphilis, and osmium tetraoxide which was used to treat rheumatoid arthritis.
Chemical bonds form between atoms through electrostatic forces of attraction. There are strong covalent and ionic bonds that involve electron sharing or transfer, as well as weaker dipole-dipole and London dispersion forces. Covalent bonds form between nonmetals by sharing electron pairs, while ionic bonds form between metals and nonmetals through the transfer of electrons. The type and strength of bonding between atoms determines the properties of the resulting chemical substances.
Chemical properties of p block elements .Momina Faheem
The document discusses the chemical properties of various p-block elements. It describes how elements within the groups react with substances like oxygen, hydrogen, halogens and metals. For example, it notes that aluminum burns in air if powdered, reacts with chlorine, and does not react with alkalis like sodium hydroxide at moderate temperatures. It also summarizes the reactions of group 13 (boron forms trihalides), group 14 (carbon remains unreactive with air), group 15 (nitrogen reacts with hydrogen to form ammonia), group 16 (oxygen readily forms compounds with most elements), group 17 (halogens react with hydrogen to form hydrogen halides) and group 18 elements (noble gases
The document contains 10 multiple choice questions about the hydrogen spectrum. It discusses that the essential condition to observe the hydrogen spectrum is high temperature and low pressure. The hydrogen spectrum appears as distinct lines, with the prominent line being red with a wavelength of 656 nm. It is an example of a line spectrum and can be recorded using a spectroscope. Robert Bunsen and Gustav Kirchhoff discovered the hydrogen spectrum and spectroscope, while Isaac Newton first discovered the word "spectrum".
The document provides information about grade 10 IGCSE chemistry content related to properties and reactions of metals. It discusses distinguishing metals from non-metals, reactivity series, extraction of metals like iron from ores, and uses of metals such as aluminum and zinc. It also describes physical and chemical properties of metals, structure and properties of alloys, and reactions of metals with water, steam, and acids to determine reactivity order.
This document provides an introduction to transition metal complexes. It discusses the aqueous chemistry of metal ions, including hydrolysis. Hexaaqua ions form when transition metals dissolve in water and are surrounded by six water molecules in an octahedral structure. Hydrolysis occurs when water molecules attack these complexes, removing protons and forming hydroxide ions. This makes the solution acidic. The document also discusses stability constants, which are equilibrium constants for the formation of complex ions from their constituent parts. Higher stability constants indicate more stable complexes.
- The document discusses various properties of metals such as aluminium being the most abundant metal, platinum being the most precious metal, and iron being the most usable metal. It also discusses properties of specific metals like lithium being the lightest metal and lead being the poorest conductor of heat.
- Metals are elements that form cations by losing electrons and exist as electropositive elements, except for hydrogen. Mercury is an example of a metal that exists in liquid form. Metal oxides are generally basic in nature.
- Alkali metals are the most reactive group of metals due to their large size and low ionization energy values. Properties like malleability, ductility and reactivity can also vary between
Le Châtelier's Principle states that if a stress is applied to a system at equilibrium, the system will adjust to partially counteract the stress and reach a new equilibrium position. Changes in concentration, pressure, volume, or temperature can act as stresses. For example, increasing the concentration of reactants will shift the equilibrium to the product side. A catalyst will speed the rate of both the forward and reverse reactions but will not change the equilibrium position or constant.
Metal complexes in therapeutic use of non chelated compoundssanjeevani kashyap
1. The document discusses various metal complexes that are used as therapeutic agents, including cisplatin, ruthenium complexes, and gold complexes which are used as anticancer agents.
2. Bismuth complexes are mentioned as being used as antimicrobial agents to treat conditions caused by H. pylori bacteria.
3. Early metal complexes mentioned include salvarsan, an arsenic-containing drug used to treat syphilis, and osmium tetraoxide which was used to treat rheumatoid arthritis.
Chemical bonds form between atoms through electrostatic forces of attraction. There are strong covalent and ionic bonds that involve electron sharing or transfer, as well as weaker dipole-dipole and London dispersion forces. Covalent bonds form between nonmetals by sharing electron pairs, while ionic bonds form between metals and nonmetals through the transfer of electrons. The type and strength of bonding between atoms determines the properties of the resulting chemical substances.
Organometallic Compounds_Notes.pdf sem 4jyothisaisri
Organometallic compounds contain direct bonds between carbon atoms in organic groups and metal atoms. They can be classified based on bond type as ionic, covalent, or pi-bonded. Metal carbonyls contain carbon monoxide ligands bonded to a metal. The 18-electron rule states that metal complexes are most stable when the metal has 18 electrons in its valence shell through contributions from its own electrons and electrons donated by ligands. Metal carbonyls can be analyzed using this rule by counting electrons donated by each ligand type to the metal.
This ppt explains basics of corrosion, its significance, Mechanism of electrochemical and chemical corrosion, Cathodic protection, Anodic protection, Sacrificial protection, Galvanization, Concentration Corrosion, Pitting Corrosion and also describe about the prevention and control of corrosion with respect to protective coatings and modification in design.
PPT on transition elements which includes properties, trends, oxidation states, color, and magnetic behavior and position of transition elements in the periodic table.
This document discusses transition series elements and their properties. It describes how transition elements have electrons that enter the (n-1)d orbitals, giving them variable oxidation states up to +8. Their atomic radii decrease across periods but increase down groups. Transition metals can conduct heat and electricity well and can be alloyed to improve strength. Some have magnetic properties depending on unpaired electrons. Their colored complexes are due to electron transitions between d orbitals. Common applications include stainless steel, bronze, and uses of copper and nickel in coins, batteries, and turbines.
Sodium hydroxide, also known as lye or caustic soda, is a highly caustic metallic base. It is a white crystalline solid that is odorless, highly soluble in water, and very corrosive. The three main industrial processes for manufacturing sodium hydroxide are the mercury cell process, Nelson diaphragm cell process, and membrane cell process, all of which involve the electrolysis of brine solutions. Sodium hydroxide has a wide variety of industrial uses including in soap making, as a cleaning agent, in aluminum production, and in the paper pulp industry. It can cause severe burns upon contact with skin or tissues due to its highly exothermic and caustic reactions.
This document provides information about important families of elements in the periodic table including halogens, noble gases, chalcogens, and alkali and alkaline earth metals. It also discusses the classes of elements, position and electronic configurations of transition metals, and trends in various properties like ionization energies, oxidation states, magnetic properties, and formation of colored ions and complex compounds. The document explains how transition metals exhibit a variety of properties due to their ability to adopt multiple oxidation states and form complexes through d-orbital involvement.
Ethers are a class of organic compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups. They have the general formula R–O–R′, where R and R′ represent the alkyl or aryl groups.
This document provides an overview of organic chemistry. It discusses the structural representation of organic compounds including Lewis structures, condensed formulas, and bond line drawings. It also describes three-dimensional representations using wedge and dash notation. Additionally, it covers the classification of organic compounds into acyclic, alicyclic, and aromatic groups. The document discusses IUPAC nomenclature rules and naming conventions for functional groups, hydrocarbons, and cyclic compounds. It also touches on isomerism, reaction mechanisms, and common purification methods like crystallization, distillation, and extraction.
The document discusses the Wagner-Meerwein rearrangement, a reaction first observed in 1899 where a carbocation is generated followed by a [1,2]-shift of an adjacent carbon-carbon bond to form a new carbocation. This reaction was not fully understood until 1922 when its ionic nature was revealed. The rearrangement involves the migration of hydrogen, alkyl, or aryl groups between carbocations and can involve multiple consecutive shifts. It can be initiated through various means to generate the initial carbocation and the migrating group retains its stereochemistry.
Coordinate covalent bonds involve one atom contributing both electrons to form a bond that cannot be distinguished from a regular covalent bond. Metallic bonds are depicted by the electron sea model where positive metal ions are immersed in a sea of delocalized and mobile electrons. Network covalent solids have atoms bonded covalently forming very hard, high melting point materials that are poor conductors such as diamond. Allotropes of carbon include diamond, graphite, amorphous carbon, fullerenes, carbon nanotubes, buckyballs, and lonsdaleite which each have different bonding structures and properties.
NCERT solutions for class 11th chemistrySrikanth KS
This document is an NCERT Chemistry Solution Manual that provides solutions to chapters 1-14 of an NCERT chemistry textbook. It includes headings for each chapter that are followed by multiple pages of solutions and explanations to problems and concepts within that chapter. The chapters cover topics like basic chemistry concepts, atomic structure, classification of elements, states of matter, thermodynamics, chemical equilibrium, redox reactions, hydrogen, s-block elements, p-block elements, organic chemistry basics, hydrocarbons, and environmental chemistry.
This document discusses molecular shape and polarity. It explains that a molecule's polarity depends on the presence of polar bonds and its overall shape. Polar bonds form when there is an unequal sharing of electrons between atoms. To determine a molecule's polarity, one must draw its Lewis structure, use VSEPR theory to predict its shape, determine if bonds are polar, then add bond dipoles. If dipoles cancel out, the molecule is nonpolar. If not, it is polar. Symmetry is also important - symmetrical molecules with identical bond polarities are nonpolar. Examples include the polar NH3 and nonpolar CO2 and symmetrical NF3.
Transition metal carbonyls form when carbon monoxide bonds to a transition metal through both sigma and pi bonding. This synergistic metal-ligand bonding strengthens the metal-carbon bond. Metal carbonyls can be classified based on the ligands present and the number/structure of metal atoms. They exhibit a variety of reactions including substitution, reactions with halogens, and disproportionation. Metal carbonyls display properties related to their toxicity, magnetic behavior, thermal stability, and thermodynamic instability.
Bioinorganic chemistry examines the roles of inorganic elements in biological processes. Metal ions can have structural or catalytic roles. The human body contains 11 essential elements that make up 99% of mass, including bulk metals like sodium, magnesium, and calcium. Transition metals like iron, copper, and zinc are also required in small amounts. Metalloenzymes utilize transition metals as catalytic centers, with iron, zinc, and copper appearing in oxygen-binding proteins, hydrolytic enzymes, and redox enzymes. Porphyrin complexes incorporate metals into their centers and are important in molecules like hemoglobin, myoglobin, and chlorophyll.
1) The document investigates the mechanism of crevice corrosion on duplex stainless steel UNS S32101 through experimental testing.
2) Potentiodynamic polarization curves and potentiostatic polarization experiments showed delayed and immediate crevice corrosion can be initiated at different applied potentials in NaCl solution.
3) In situ observations and ex situ analysis revealed diversity in crevice corrosion morphology due to relocation of active dissolution areas from corrosion product effects.
The document discusses the principles of metallurgy and metal extraction processes. It defines metals, non-metals and metalloids based on their properties. The processes involved in metal extraction include mining, crushing, concentration, roasting, reduction and refining. Concentration methods separate the metal ore from gangue using techniques like gravity separation, magnetic separation or froth flotation. Reduction converts the metal oxide into pure metal using carbon or aluminothermic processes. Refining further purifies the metal using techniques like liquation, distillation, electrolysis or poling. Overall, the document provides an overview of the key concepts and steps involved in extracting and processing metals from their ores.
1. The document discusses the extraction of metals from their ores. It describes the natural occurrence of metal ores, the concentration and purification processes, and specific methods for extracting tin, copper, and aluminum.
2. Key concentration methods mentioned include magnetic separation, froth flotation, and leaching. Thermal and electrolytic reduction are discussed as the main reduction techniques.
3. Tin is mainly extracted from the ore cassiterite, copper from copper pyrite and malachite/azurite, and aluminum from bauxite via the Bayer process.
Organometallic Compounds_Notes.pdf sem 4jyothisaisri
Organometallic compounds contain direct bonds between carbon atoms in organic groups and metal atoms. They can be classified based on bond type as ionic, covalent, or pi-bonded. Metal carbonyls contain carbon monoxide ligands bonded to a metal. The 18-electron rule states that metal complexes are most stable when the metal has 18 electrons in its valence shell through contributions from its own electrons and electrons donated by ligands. Metal carbonyls can be analyzed using this rule by counting electrons donated by each ligand type to the metal.
This ppt explains basics of corrosion, its significance, Mechanism of electrochemical and chemical corrosion, Cathodic protection, Anodic protection, Sacrificial protection, Galvanization, Concentration Corrosion, Pitting Corrosion and also describe about the prevention and control of corrosion with respect to protective coatings and modification in design.
PPT on transition elements which includes properties, trends, oxidation states, color, and magnetic behavior and position of transition elements in the periodic table.
This document discusses transition series elements and their properties. It describes how transition elements have electrons that enter the (n-1)d orbitals, giving them variable oxidation states up to +8. Their atomic radii decrease across periods but increase down groups. Transition metals can conduct heat and electricity well and can be alloyed to improve strength. Some have magnetic properties depending on unpaired electrons. Their colored complexes are due to electron transitions between d orbitals. Common applications include stainless steel, bronze, and uses of copper and nickel in coins, batteries, and turbines.
Sodium hydroxide, also known as lye or caustic soda, is a highly caustic metallic base. It is a white crystalline solid that is odorless, highly soluble in water, and very corrosive. The three main industrial processes for manufacturing sodium hydroxide are the mercury cell process, Nelson diaphragm cell process, and membrane cell process, all of which involve the electrolysis of brine solutions. Sodium hydroxide has a wide variety of industrial uses including in soap making, as a cleaning agent, in aluminum production, and in the paper pulp industry. It can cause severe burns upon contact with skin or tissues due to its highly exothermic and caustic reactions.
This document provides information about important families of elements in the periodic table including halogens, noble gases, chalcogens, and alkali and alkaline earth metals. It also discusses the classes of elements, position and electronic configurations of transition metals, and trends in various properties like ionization energies, oxidation states, magnetic properties, and formation of colored ions and complex compounds. The document explains how transition metals exhibit a variety of properties due to their ability to adopt multiple oxidation states and form complexes through d-orbital involvement.
Ethers are a class of organic compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups. They have the general formula R–O–R′, where R and R′ represent the alkyl or aryl groups.
This document provides an overview of organic chemistry. It discusses the structural representation of organic compounds including Lewis structures, condensed formulas, and bond line drawings. It also describes three-dimensional representations using wedge and dash notation. Additionally, it covers the classification of organic compounds into acyclic, alicyclic, and aromatic groups. The document discusses IUPAC nomenclature rules and naming conventions for functional groups, hydrocarbons, and cyclic compounds. It also touches on isomerism, reaction mechanisms, and common purification methods like crystallization, distillation, and extraction.
The document discusses the Wagner-Meerwein rearrangement, a reaction first observed in 1899 where a carbocation is generated followed by a [1,2]-shift of an adjacent carbon-carbon bond to form a new carbocation. This reaction was not fully understood until 1922 when its ionic nature was revealed. The rearrangement involves the migration of hydrogen, alkyl, or aryl groups between carbocations and can involve multiple consecutive shifts. It can be initiated through various means to generate the initial carbocation and the migrating group retains its stereochemistry.
Coordinate covalent bonds involve one atom contributing both electrons to form a bond that cannot be distinguished from a regular covalent bond. Metallic bonds are depicted by the electron sea model where positive metal ions are immersed in a sea of delocalized and mobile electrons. Network covalent solids have atoms bonded covalently forming very hard, high melting point materials that are poor conductors such as diamond. Allotropes of carbon include diamond, graphite, amorphous carbon, fullerenes, carbon nanotubes, buckyballs, and lonsdaleite which each have different bonding structures and properties.
NCERT solutions for class 11th chemistrySrikanth KS
This document is an NCERT Chemistry Solution Manual that provides solutions to chapters 1-14 of an NCERT chemistry textbook. It includes headings for each chapter that are followed by multiple pages of solutions and explanations to problems and concepts within that chapter. The chapters cover topics like basic chemistry concepts, atomic structure, classification of elements, states of matter, thermodynamics, chemical equilibrium, redox reactions, hydrogen, s-block elements, p-block elements, organic chemistry basics, hydrocarbons, and environmental chemistry.
This document discusses molecular shape and polarity. It explains that a molecule's polarity depends on the presence of polar bonds and its overall shape. Polar bonds form when there is an unequal sharing of electrons between atoms. To determine a molecule's polarity, one must draw its Lewis structure, use VSEPR theory to predict its shape, determine if bonds are polar, then add bond dipoles. If dipoles cancel out, the molecule is nonpolar. If not, it is polar. Symmetry is also important - symmetrical molecules with identical bond polarities are nonpolar. Examples include the polar NH3 and nonpolar CO2 and symmetrical NF3.
Transition metal carbonyls form when carbon monoxide bonds to a transition metal through both sigma and pi bonding. This synergistic metal-ligand bonding strengthens the metal-carbon bond. Metal carbonyls can be classified based on the ligands present and the number/structure of metal atoms. They exhibit a variety of reactions including substitution, reactions with halogens, and disproportionation. Metal carbonyls display properties related to their toxicity, magnetic behavior, thermal stability, and thermodynamic instability.
Bioinorganic chemistry examines the roles of inorganic elements in biological processes. Metal ions can have structural or catalytic roles. The human body contains 11 essential elements that make up 99% of mass, including bulk metals like sodium, magnesium, and calcium. Transition metals like iron, copper, and zinc are also required in small amounts. Metalloenzymes utilize transition metals as catalytic centers, with iron, zinc, and copper appearing in oxygen-binding proteins, hydrolytic enzymes, and redox enzymes. Porphyrin complexes incorporate metals into their centers and are important in molecules like hemoglobin, myoglobin, and chlorophyll.
1) The document investigates the mechanism of crevice corrosion on duplex stainless steel UNS S32101 through experimental testing.
2) Potentiodynamic polarization curves and potentiostatic polarization experiments showed delayed and immediate crevice corrosion can be initiated at different applied potentials in NaCl solution.
3) In situ observations and ex situ analysis revealed diversity in crevice corrosion morphology due to relocation of active dissolution areas from corrosion product effects.
The document discusses the principles of metallurgy and metal extraction processes. It defines metals, non-metals and metalloids based on their properties. The processes involved in metal extraction include mining, crushing, concentration, roasting, reduction and refining. Concentration methods separate the metal ore from gangue using techniques like gravity separation, magnetic separation or froth flotation. Reduction converts the metal oxide into pure metal using carbon or aluminothermic processes. Refining further purifies the metal using techniques like liquation, distillation, electrolysis or poling. Overall, the document provides an overview of the key concepts and steps involved in extracting and processing metals from their ores.
1. The document discusses the extraction of metals from their ores. It describes the natural occurrence of metal ores, the concentration and purification processes, and specific methods for extracting tin, copper, and aluminum.
2. Key concentration methods mentioned include magnetic separation, froth flotation, and leaching. Thermal and electrolytic reduction are discussed as the main reduction techniques.
3. Tin is mainly extracted from the ore cassiterite, copper from copper pyrite and malachite/azurite, and aluminum from bauxite via the Bayer process.
1. The document discusses the processes involved in isolating elements from minerals and ores, including concentration, extraction of crude metal, and reduction.
2. Concentration involves removing unwanted materials (gangue) from the ore using methods like hydraulic washing, magnetic separation, and froth flotation.
3. Extraction of crude metal involves converting the concentrated ore into an oxide through calcination or roasting, then reducing the metal oxide to extract the pure metal using a reducing agent like carbon.
General principles and processes of isolation of elementsMukul Kumar
The document discusses the extraction and purification processes of various metals like aluminum, copper, zinc, and iron. It explains that metals are usually found in earth's crust in the form of ores and have to be extracted through various metallurgical processes. These include steps like concentration, roasting, reduction of metal oxides, electrolysis, zone refining etc. It also provides examples of the uses of these purified metals in various applications and industries.
The document discusses the extraction and purification processes of various metals like aluminum, copper, zinc, and iron. It explains that metals are usually found in Earth's crust in the form of ores containing the metal combined with other elements. The extraction process involves steps like concentration, roasting, reduction with suitable reducing agents. Purification techniques mentioned include electrolysis, zone refining, and chromatography. The various uses of these metals in industries and daily life are also outlined.
The document discusses how metals occur in nature and the processes involved in extracting metals from ores. It makes the following key points:
1. Metals occur naturally in either a native state or combined state, depending on their chemical reactivity. The major steps to extract metals from ores include crushing, grinding, concentrating the ore, converting it to an oxide, extracting the crude metal, and refining the metal.
2. Concentrating the ore involves removing gangue and involves processes like magnetic separation, froth flotation, and electrostatic separation which separate materials based on differences in their physical properties.
3. Extractive metallurgy is the scientific process used to isolate metals from ores through various physical
The document discusses the various processes involved in metallurgy, which is the extraction of metals from ores and their purification. There are three main types of metallurgical processes - pyrometallurgy which uses high temperatures, hydrometallurgy which uses aqueous solutions, and electrometallurgy which uses electrolysis. Common steps in metal extraction include mining the ore, crushing and grinding it, concentrating the ore to remove impurities, roasting or calcining it, reducing the metal oxides to the pure metal, and finally refining the metal through processes like liquation, distillation, or electrolysis.
Metallurgy involves extracting metals from their ores in their pure state. Most reactive metals are found combined as sulfates, carbonates, or oxides, while less reactive metals occur naturally in their free metallic state. The process of metallurgy includes mining ores, concentrating the ores to remove impurities, oxidizing and reducing the ores, and refining the reduced metals. Electrolytic refining is used to remove soluble and insoluble impurities from reduced metals to produce pure metals.
General principles and processes of isolation of elementsniralipatil
The document discusses various principles and processes involved in the isolation of elements from their ores. It describes how ores are concentrated to remove gangue, then converted to oxides which are reduced to extract the pure metals. Specific processes are outlined for extracting important metals like iron, aluminium, and copper using techniques like calcination, roasting, electrolytic refining, and zone refining. Blast furnaces and Hall-Heroult cells are also summarized.
This document discusses various methods used to extract metals from their ores, including concentration, roasting/calcination, reduction, and refining. It describes several concentration methods like magnetic separation, hydraulic washing, and froth floatation to separate ores from gangue. Leaching is also discussed as a chemical separation process used to extract metals like aluminum, gold, silver, and low-grade copper ores. Overall, the document provides an overview of key terms and processes involved in the metallurgy of extracting pure metals from raw mineral ores.
General Principles and Processes of Isolation of Elements.pptxDamnScared
t is usually contaminated with earthly or undesired materials known as gangue. The extraction and isolation of metals from ores involves the following major steps: • Concentration of the ore, • Isolation of the metal from its concentrated ore, and • Purification of the metal.
The document discusses the extraction of three important metals - iron, aluminum, and copper. It describes how these metals are commonly found as ores and the multi-step processes required to extract the pure metals. Iron is extracted from its ore, hematite, using a blast furnace. Aluminum is extracted via electrolysis of aluminum oxide in molten cryolite. Copper is extracted through concentration, roasting, smelting and refining processes including bessemerization to produce blister copper from chalcopyrite ore.
The document discusses the process of extracting metals from ores. It explains that ores rarely contain only the desired metal and usually include unwanted materials called gangue. The extraction process involves three main steps - concentrating the ore, isolating the metal from the concentrated ore, and purifying the metal. It describes various concentration techniques used depending on the properties of the ore, including hydraulic washing, magnetic separation, and froth floatation. Leaching is also used to extract some metals by dissolving them in solvents like sodium cyanide solutions. The entire scientific process of extracting metals from ores is called metallurgy.
Metals and non-metals have unique properties. Sodium and potassium have low melting points while mercury is liquid. Most metals like gold and silver are malleable and ductile, allowing them to be formed into wires. Electric wires are coated in plastic to prevent electric shock from conduction. Non-metals like carbon exist in different allotropes with varying properties. Metals react with oxygen to form metal oxides, and react with water to form metal hydroxides and hydrogen gas. More reactive metals can displace less reactive metals from their salt solutions. Metals are extracted from ores through processes like enrichment, roasting, and electrolytic refining.
The document discusses metals, minerals, ores, and metallurgy. It describes how metals are found naturally, either in their free elemental state or combined as minerals and ores. Metallurgy is the process of extracting metals from ores and purifying them. Metals are categorized based on their reactivity, and extracted using different methods like electrolysis or heating with carbon or in air. The document also discusses alloying, corrosion, and methods to prevent corrosion like coating and alloying with other metals.
This document discusses the physical and chemical properties of metals and non-metals. It describes how metals are generally solid, malleable, and good conductors, while non-metals can be solid, liquid, or gas and are not malleable. It also explains how metals react with oxygen, water, and acids, forming ionic compounds. Common extraction methods are outlined, such as electrolysis for reactive metals and roasting/reduction for others. The document concludes by discussing corrosion prevention through methods like galvanization and alloying.
The document discusses the physical and chemical properties of metals and non-metals. It describes how metals are generally solids, malleable, good conductors of heat and electricity, and react with oxygen, water, acids, and displace less reactive metals. It also discusses how non-metals can be solids, liquids or gases, are not malleable, and are generally poor conductors. The document then explains the extraction of metals from ores through concentration, reduction, and refining processes.
Metallurgy is the process of extracting metals from ores and purifying them. It involves various physical and chemical steps. Key physical steps include crushing ores, concentrating them using processes like magnetic separation or flotation, and mechanically separating gangue from ores. Chemical steps include roasting or calcination to remove impurities, reduction of metal oxides using coke or other reducing agents, and electrolytic refining to obtain pure metals. The overall metallurgy process allows extraction of metals from ores on a commercial scale.
This document discusses the physical and chemical properties of metals and non-metals. It describes how metals react with oxygen, water, and acids. A reactivity series of metals is provided from most reactive to least. The document explains how ionic compounds form and their properties. The extraction of metals from ores is summarized including concentration, reduction, and refining steps. Common extraction methods are outlined for metals of high, medium, and low reactivity in the series.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Thinking of getting a dog? Be aware that breeds like Pit Bulls, Rottweilers, and German Shepherds can be loyal and dangerous. Proper training and socialization are crucial to preventing aggressive behaviors. Ensure safety by understanding their needs and always supervising interactions. Stay safe, and enjoy your furry friends!
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
How to Build a Module in Odoo 17 Using the Scaffold Method
Metallurgical process.pptx
1. Metal
Metals and metallurgical principle
Alkali metal and compounds
Alkaline earth metals and compounds
By Govinda pathak
2.
3. Metals and metallurgical principle:
NEB syllabus
Characteristics of metals, non metals and metalloids.
Minerals and ores
Important minerals deposit in Nepal
Different processes involved in metallurgical process.
Concentration
Calcination and roasting
Smelting (carbon reduction)
Thermite process
Electrochemical reduction
Refining of metals ( Poling, electrochemical refining etc.)
4. Comparative study of metal non metal and metalloid
Metal Non-metal Metalloid
1. They are usually solid in
nature.
Exception: mercury is liquid at
room temperature
1. They do exist usually in all
three states
1. Those elements which can
show some properties of
metals and some properties of
nonmetals.
2. They are good conductor of
heat and electricity.
2. They are poor conductor of
heat and electricity
Exception: Graphite
conducts electricity
2. These are also called border
line elements because they lie
in between metal and non-
metal in the periodic table. E.g.
Arsenic (As), Sb, Ge, etc.
3. They generally have high
density.
3. They generally have low
density.
3. They can form acidic oxides
like non-metals and can
conduct heat and electricity
like metals.
4. They are malleable and
ductile in nature. 4. They are brittle in nature.
4.They are neither malleable
nor ductile but sometimes
5. 5. They contain less number of
electrons in outermost shell so
they can easily loose electron
and become electropositive.
5. Non-metals contains more
electron in their outermost
shell so they easily gain
electron and become
electronegative.
6 Metals can easily get oxidized.
6 Non-metals can easily be
reduced.
5.They are oxidized by nitric
acid .
7 They are reducing agent. 7 They are oxidizing agent.
8. They form basic oxide.
Exception: ZnO and Al2O3 are
amphoteric in nature.
8. They form the acidic oxide.
6.They form hydrides with
hydrogens like AsH3 , SbH3 and
these are gases.
9. During electrolysis, they
deposit at Cathode.
9. During electrolysis, they
deposit at the anode.
6. Minerals and ores:
• The naturally occurring substances which contain metal in it are known as
minerals.
• Example: Al2O3SiO2.2H2O (Clay)
• The minerals from which we can extract the metal in economical as well as
convenient way are known as ores.
• Example: Bauxite Al2O3.2H2O
Note: from Bauxite (Al2O3. 2H2O) metal Aluminum can be extracted
economically because it only contains Aluminum. So, it is an ore.
But clay (Al2O3. 2SiO2. 2H2O) also contains the Aluminium but there is less
presence of Aluminium in it. So, we cannot extract Aluminium from it
economically. So, it is a mineral.
1) Differentiate between mineral and ore?
2) All ores are minerals but the reverse may not be truth. Justify with
7. Alloy
They are the homogeneous mixture of metals with metals or metals with
non-metals. The homogeneous mixture of non-metal and non-metal is not
called alloy. Basically, alloys are of two types and they are:
Ferrous Alloys.
Non- Ferrous Alloys.
Ferrous alloys:
Those alloys which contain Iron in it are called ferrous alloys.
E.g. Steel (Fe+ C), stainless steel (Fe+ Ni+ Cr+ C), etc.
Non- ferrous alloys:
Those alloys which do not contain Iron in it are known as non-ferrous
alloys.
E.g. Brass (Cu+ Zn), Bronze (Cu+ Sn)
8. Importance of Alloys:
They are less rusting in nature in comparison to the pure metals. So, using
alloys we can save the loss from rusting.
Alloys are stronger than metal i.e. by making alloys we can increase the
mechanical strength of metals.
Alloys are useful for making colorful utensils and materials i.e. we can import
color if we make the alloy.
Amalgam
The homogeneous mixture of Mercury with metal is known as amalgam.
Mercury is in liquid form so by dissolving metal on Mercury we can obtain
an Amalgam.
E.g. Hg+ Na, Na-Hg [Sodium amalgam],Na/Hg
Hg+Cu,Cu.Hg[Copper amalgam],Cu/Hg
Note: metals like Iron (Fe), Cobalt (Co) and Nickel(Ni) don’t form amalgam
because they do not dissolve in Mercury.
9. Uses of Amalgam:
Copper amalgam is used for filling the cavity in teeth.
Sodium amalgam (NaHg) is used as reducing agent instead of
Sodium (Na).
EXISTENCE OF METAL
Depending upon the reactivity of metal they can either exist in combined
state or in free State. Those metals which are highly reactive in nature
are located in top position of electrochemical series and non-reactive
metals are in bottom of the electrochemical series. Metals like Na, K, Ca
are most reactive and they combine with most reactive non-metals i.e.
halides. Similarly, metals like Fe, Mg, Al, etc. exits in oxides form. Similarly,
Cu, Zn, Pb, etc. exist in sulphide form and Au, Ag, Pt exist in Free State.
Why are metals generally not found in free(native) state? Give examples.
10. Metallurgy:
The branch of science that deals with the study of extraction and purification
of metal is known as Metallurgy. Occurrence of minerals in
Nepal(learn yourself)
Different steps involved in metallurgical process.
Metallurgical process involves following steps.
1. Mining
2. Crushing and pulverization
3. Concentration
4. Preliminary treatment (calcination or roasting)
5. Reduction
6. Purification or refining
11. 1. Mining
The collection of Ore from the mines is mining. It is 1st step of Metallurgy.
2. Crushing and Pulverization
The process of converting big lumps of ore into smaller pieces by using crush
mill is known as crushing. The process of changing crushed ore into a fine
powder by using ball mill is known as pulverization.
3. Concentration of the ore.
This is the method of removing impurities present in powder ore in order to
increase the extent of ore. Depending upon the nature of ore and impurities
present on given ore concentration can be carried out by following ways:
a. Magnetic separation:
If one of impurities or ore is magnetic and another is non-magnetic then such
types of ores can be concentrated by using electromagnetic separation. During
this process powdered ore is transferred into the rotating belt fitted with rotator or
wheel where one of the rotator is magnetic in nature.
12. On passing the ore in rotating belt magnetic particles will be attracted by
magnetic rotator collected near the rotator. Whereas non-magnetic particles
will be collected away from rotator. During concentration of tin stone (SnO2)
iron impurities present can be separated by this method.
Fig: Magnetic separation
Gangue or Matrix: Unwanted earthy impurities present in the powder ore.
13. a) :
b. Gravity separation:
If the density of the impurities and ore
is different than such types of
impurities can be separated out by
using gravity separation method.
During the separation given ore is
transferred into the vessel where
stream of water is passed from the
bottom. Inside the vessel lighter
impurities will be washed away with
water whereas heavier ore particles get
settled down at bottom. Generally,
oxide and hydroxide ore can be
concentrated by this method. E.g.
Bauxite ore of aluminum, Hematite or
Magnetite ore of Iron etc.
Fig: Gravity Separation
Differentiate between magnetic separation and Gravity
separation. (Yourself)
14. c. Froth flotation method:
This is the specific method for concentration of Sulphides ore like PbS (Galena),
ZnS (Zinc blend), CuFeS2 (copper pyrite), HgS (Cinnabar).
This method is based on the principle that solids have the different attraction
towards liquids.
In this method, powdered ore is mixed
with water along with little amount of oil
like a pine oil or Eucalyptus oil in a
vessel known as flotation. On passing a
compressed air inside a vessel
agitation takes place inside and
vigorous bubbling occurs. Sulphide ore
which get preferentially wetted with oil
forms bubbles and collected at a
surface as a scum or forth whereas
impurities which get preferentially
wetted with water get settled down at a
bottom of vessel from a forth one can Fig: Froth flotation
15. d. Leaching
This is a chemical method of concentration of ore.In this method powdered
ore is treated with suitable chemical (Acid or Base) so that metallic portion
present in given ore get dissolved with chemical but impurities don’t get
dissolve. By filtration impurities can be separated as a residue while a
filtrate will contain the metallic portion. From filtrate concentrated ore can
be recovered by suitable chemical technique like precipitation. Generally,
ores of Aluminum, gold and silver can be concentrated by leaching.
For example- Bauxite is treated with conc. NaOH solution, aluminium oxide
is dissolved leaving behind insoluble impurities which are removed by
filtration.
16. 4. Preliminary treatment:
The process of extraction of metal from the concentrated ore
depends upon the nature of the ore as well as the nature of
impurities present in the ore. Before the concentrated ore is
subjected to final metallurgical operations in order to get the metal
in the free state, the preliminary chemical treatment may be
necessary. The objective of this preliminary chemical treatment is:
(a) to get rid of impurities which would cause difficulties in the later
stages; and
(b) to convert the ore into oxide of the metal because it is easier to
reduce an oxide than the carbonate or sulphide.
The processes employed for preliminary treatment are calcination
and roasting.
17. Calcination:
It is the process of heating a concentrated ore in the absence or
little supply of air below the melting point of ore.
It is mainly carried out for hydroxides, carbonate and nitrates
ores.
Decomposition of ore may take place.
ZnCO3 → ZnO + CO2
During calcination following changes takes place.
a. Moisture gets removed.
b. Volatile impurities gets removed.
c. Water of crystallization gets removed
Al2O3.2H2O → Al2O3+ 2H2O
18. Roasting:
It is the process of heating a concentrated ore in the presence of air
below the melting point of ore.
It is mainly carried out for sulphide ores
Oxidation of ore takes place
2ZnS+ 3O2 → 2ZnO+ 2SO2
PbS+ O2 → PbO+ SO2
During roasting following changes take place
a. Moisture volatile impurities and organic matters get removed.
b. Elements like S, P, As etc. gets oxidized.
S+ O2 → SO2
4P+ 5O2 →2P2O5
As+ O2 → As2O3
19. Calcination and roasting is carried in reverberatory furnace.
Question : Differentiate between Calcination and Roasting. ( VVVVIMP)
20. 5) REDUCTION/ EXTRACTION OF METAL FROM METALLIC OXIDE
Metals can be extracted from metallic oxide removing oxygen present in them.
Such process of removal of oxygen with the help of suitable reducing agent is
known as reduction.
Depending upon the nature of metal, reduction can be carried out by chemical
method or electrolytic method.
There are different types of reduction which are:
a) Reduction with Carbon: (smelting) vvvimp
• Metals which lies in central or lower position in electrochemical series can be
extracted by using carbon as a reducing agent. In this method calcined or
roasted ore is mixed with Carbon (as a source of Carbon we can use coke, coal
or charcoal) along with suitable flux. On providing a sufficient heat, reduction
proceeds and metal is obtained in a molten state. So, this method is also
known as smelting. Flux combines with impurities(refractory impurities)
resulting a slag which also exist in molten state. Taking an advantage of
immiscibility of slag with metal, Slag can be removed easily and almost pure
metal is obtained.
What is reduction in metallurgy?
21. • Fe2O3+ C → Fe+ CO
• ZnO+ C→ Zn+ CO
• SnO2+ C→ Sn+ CO
Refractory impurities get removed with flux resulting a slag.
E.g. During extraction of Fe, an ore may contain CaO as a refractory impurity
so acidic flux like SiO2 is added for the removal of impurity.
CaO (RI)+ SiO2(flux)→ CaSiO3(slag)
Limitations:
Highly reactive metals like Na, K, Ca can not be extracted from this method.
Metal can’t be extracted from metallic oxide in which oxygen has the strong
affinity with metal than with Carbon.
22. b) Reduction with Aluminium (Aluminothermite process)
Metallic oxides in which Oxygen has strong affinity with metal than Carbon,
such type of oxides can’t be reduced by Carbon. So, aluminum which is
powerful reducing agent than carbon can be used as a reducing agent
instead of Carbon. Generally, metals like Manganese, Chromium and
Nickel used to be extracted by this method. In this method, calcined or
roasted ore is thoroughly mixed with Aluminum powder along with little
amount of Barium Peroxide (BaO2) and kept in a suitable crucible fitted
with magnesium ribbon. Heat energy required to initiate reduction is
supplied by burning of BaO2 and magnesium ribbon. Once the reduction is
started, heat is evolved inside a crucible because the reaction is
exothermic in nature. In this process also metal is obtained in molten state.
Examples:
3MnO2+4Al → 3Mn+ 2Al2O3+ Heat
Cr2O3+ 2Al → 2Cr+ Al2O3+ Heat
23. c) Electrolytic Reduction
Highly reactive metals like Na, K, and Ca etc. can’t be extracted from their oxide by
chemical method of reduction because, in order to reduce their oxide there is necessity
of huge amount of heat and at very high temperature these metals form some undesired
products. Extraction of such metal can be done by carrying out an electrolysis of molten
salt. During electrolytic reduction aqueous solution of salt can’t be used because
moisture is easily captured by metals and ferrous hydroxide, after electrolysis of molten
salt metal is collected at cathode.
• E.g. Na can be extracted by electrolysis of molten NaCl. During this process, Na is
collected from the cathode.
NaCl → Na++ Cl -
• At cathode: Na++ e- → Na
• At anode: 2Cl - → Cl2 (gas) + 2e-
24. Carbon reduction process (smelting) Alumino thermite process
1. The process of extracting metal by
fusion of its oxide ore with carbon is
called carbon reduction process.
1. The process of reduction of metal oxide to
metal with the help of aluminium powder
as reducing agent is called alumino
thermite process.
2. In this process, metals like Zn, Sn, Pb,
etc. are extracted.
2. In this process, metals like Cr, Mn etc. are
extracted.
3. Here, blast of hot air is passed. 3. Here, magnesium ribbon is burnt.
4. This is endothermic process.
PbO + C + Heat Pb + CO
4. This is exothermic process.
Cr2O3 + 2 Al Al2O3 + 2 Cr + Heat
5. This process can be done in 5. This process can be done in Thermite
Difference between smelting and alumino thermite process.
25. Difference between flux and slag
Flux Slag
1. Material which is added from
outside in the ore during the
process of smelting to remove
gangue is called flux.
1. Slag is a light, fusible and
waste material obtained
during the extraction of metal
by the chemical combination
of gangue and flux.
2. It may be acidic or basic, ie.
CaO (basic), SiO2 (acidic)
2. It is generally double
salt ie.,
SiO2 + CaO CaSiO3
(Gangue) (flux) (slag)
Why is flux important in metallurgy?
26. Difference between carbon reduction and electrolytic reduction
Carbon reduction Electrolytic reduction
1. Here carbon is used as reducing
agent. The roasted or calcinated ore is
mixed with coke (C) and suitable flux
in a blast furnace.
1. This reduction is suitable for the
extraction of alkali metals and
alkaline earth metals.
2. Generally oxide ore of metal is
reduced by carbon reduction process
into metal.
2. Generally sodium, potassium,
calcium, magnesium metals are
reduced to metal by electrolytic
process.
27. Difference between pyrometallurgy and electrometallurgy
Pyrometallurgy Electrometallurgy
The process of extraction of metal
from an ore by chemical
reduction at high temperature is
called pyrometallurgy.
Eg.,
Fe2O3 + C Fe + CO2
The process of extraction of metal
from an ore by electrolytic
reduction in the molten or
aqueous solution is called
electrometallurgy.
Eg.,
NaCl Na+ + Cl-
At cathode:
Na+ + e- Na
28. Gangue or Matrix
The unwanted earthy particles present in the ore are called Gangue. Eg.
Sand, acidic and basic impurities
Refractory Impurities
Those impurities which have the high melting point so that they cannot
melt easily are called refractory impurities. E.g. CaO, MgO, SiO2, etc.
Flux: Flux are the substances added for the removal of refractory
impurities.
Types of flux:
Acidic Flux: The flux used for the removal of basic impurities is known
as acidic flux. E.g. SiO2, Borax (Na2B4O7.10H2O)
CaO(RI)+ SiO2(flux) → CaSiO3 (Slag)
Basic flux: The flux used for the removal of acidic impurities is known as basic flux.
E.g. CaO, MgO, FeO, etc.
29. Slag
The resulting compound obtained after treating the refractory impurity with
suitable flux is called slag. The melting point of slag is low. So, it can be
fused easily.
6) Refining/ purification:
• Metals obtained by the chemical method of extraction is not in the pure state.
Following impurities may be associated with metals.
Residual slag or flux
Metals other than the desired one.
Unreduced metallic ores.
Elements like P, As, S , etc.
• In order to remove such types of impurities, metals should be purified.
Depending upon a nature of impurities following methods can be
applied for the purification:
30. a) Polling:
In this process molten metal is stirred with a pole of green wood. Hydro
carbon present in green wood acts as reducing agent so that oxide
impurities get reduced into respective metal. This method is specially
used for purification of Copper.
CuO+ C→ Cu+ CO
b) Electrolytic Refining:
This method is cheap and convenient. Metals like Cu, Ag, and Zn can
be refined electrolytically. The impure metal is made anode and a thin
strip of pure metal is made cathode in electrolytic cell. The cell is filled
with solution of suitable salt of concerned metal. On passing electricity,
pure metal gets deposited at cathode and the anode undergoes
dissolution. Insoluble impurities fall behind the anode in the form of
anode mud and soluble impurities go to the solution.
31.
32. SOLVED QUESTIONMS:
1 What are refractory materials?
Ans: The materials which can withstand very high temperature without melting or
softening are called refractory materials. Dolomite (MgCO3.CaCO3), Magnesium
oxide (MgO), silica (SiO2), alumina (Al2O3) are typical refractory materials.
2 Explain ‘All the ores are minerals but not all the minerals are ores.’
Ans: Those minerals from which the metals may be extracted conveniently and
economically are called ores. So, the ores are a type of mineral e.g. Bauxite (Al2O3
2H2O) and clay (Al2O32SiO3.2H2O). Both are minerals of aluminium. But, Al can
be economically extracted from the former while Al is difficult to be obtained
from the later. Hence, the former is also called ore but the later cannot. Thus, all
the ores are minerals but all the minerals are not ore.
33. DO YOURSELF:
1 Alkali and alkaline earth metals can not be obtained by a chemical reduction
method. Explain.
2 What is flux? How are they useful?
3 What is meant by slag? Why is it important in metallurgy?
4 Name the process used for the concentration of sulphide ore.
5 Why do some metals occur in the native state?
6 Define calcination and roasting?
7 What is gangue? Classify it.
8 What is metallurgy? Mentions its various types.
9 Define an alloy. What are the properties imparted to metal by the alloying
process?
10 What is meant by metallurgy? Describe briefly the various methods employed for
the general extraction of metals from their ore.