When pig iron is heated to melting and is casted into desired moulds, then it is known as cast iron. This process is known as tempering of steel and is employed for bringing the steel into a suitable state of hardness and elasticity. Metallurgy is defined as a process that is used for the extraction of metals in their pure form. The extraction of iron from its ore is a long and subdued process, that helps in separating the useful components from the waste materials such as slag. Na3AlF6 2. Answer: Sodium is a very reactive metal and on exposure to moist air, the surface of sodium metal is tarnished due to formation of sodium carbonate. ICSE Solutions Selina ICSE Solutions ML Aggarwal Solutions. Besides iron, it contains about 4% of carbon and small quantities of silicon, phosphorus, manganese and sulphur. Question 10: During the extraction of aluminium, cryolite and fluorspar are added to alumina. Manganese, copper, tin, nickel, bauxite, iron ore, gold, silver, and diamonds are just some examples of what is mined. (c) Name another metal, which is extracted by this process. (b) The slag is used in the manufacture of cement. This is even harder than pig iron. (iv) For galvanising iron sheets to prevent rusting. Question 5: Zinc displaces lead from lead nitrate solution, while gold is unable to do so. Question 7: The following questions refer to the extraction of alumnium and iron from their ores : (i) “Name the principal ore from which; (a) iron and (b) aluminium are extracted. Carbon is alloyed with iron along with nickel and chromium to form steel. The extraction of metals and its isolation occurs over a few major steps: How is iron extracted from its ore? Class-10ICSE Board - Metallurgy of Iron - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. Hence aluminium is not extracted by the “Blast Furnace Process”. Question 4: (i) Name the process and the element extracted by the above process as shown in the figure. (b) Cast iron contains 2-5% to 4% of carbon, while steel contains 0-5% to 1-5% of carbon. The CO and heat now move upwards and meet the raw material running down from the top. (b) Give two uses of slag. Answer: In moist air, a thin layer of aluminium oxide is formed on it quickly which protects aluminium to oxidise. Metal Y, has no reaction with water but its hydroxide decomposes, with slight warming, giving a black powder. Pig-iron is brittle in nature and cannot be welded. Why ? Give one example. (c) What is galvanized iron and for what purposes it is used ? Note: – Before viewing Solutions of Metallurgy by Dr Viraf and J Dalal Simplified ICSE Chemistry Solutions of Chapter-6 .Read the Chapter-6 Metallurgy Carefully to understand the concept in better way .After reading the Chapter-6 Metallurgy solve all example of your text book with ICSE Specimen Sample Paper for Class-10 Exam of Council. by painting and applying grease on the articles. Formation of Hag inside the blast furnace. Reactions in the Blast furnace at 500 – 800 K, In the upper parts with lower temperatures. Carbon monooxide is regenerated. The atom of element X is a donor of electron hence X is expected to have reducing properties. What is the special property of: (a) Type metal, (b) Duralumin ? (b) The following questions relate to the extraction of aluminium by electrolysis : (1) Give the equation for the reaction that takes place at the cathode. Why ? The entire scientific and technological process used for isolation of the metal from its ores is known as ____. (b) Copper [Cu]. (b) Sulphur is non metal because, it gives negative sulphur ions by gaining of two electrons. The variety containing lower percentage of carbon is called “mild steel and the variety which contains higher percentage of carbon is known as “hard steel”. 16. Reduction of ferric oxide by aluminium powder. Answer: (i) (a) Carbon burns in the presence of oxygen of air to form carbon dioxide which is reduced to carbon monoxide in the presence of coke. (b) How will you show that sulphur is a non-metal ? (3) Graphite acts as an anode. (d) To protect iron from rusting it is coated with a thin layer of zinc. (3) Non-metal graphite is good conductor of heat and electricity. Answer: Cryolite and fluorspar are added to alumina : (i) To lower the melting point of aluminium. (3) Soluble, as magnesium hydroxide is soluble in water. (iii) A layer of powdered cpke is sprinkled over the surface of the electrolyte mixture because it reduces the heat loss by radiation and prevents carbon anode from brning in air. A blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of hot air is blown into the bottom. (iii) What is the type of chemical reaction carried out after roasting in order to obtain zinc ? (ii) (a) For each substance listed below, explain its significance in the extraction of Aluminium: (1) Bauxite. State how zinc leaves a furnace. Also available in Class 12 Medical - Occurrence of Metals Class 12 Engineering - Occurrence of Metals Corundum 4. (iii) What would you expect to happen, if aluminium metal is heated with iron (III) oxide ? It is in the blast furnace that extraction of iron occurs. It is generally agreed that the first known metals were gold, silver, and copper, which occurred in the native or metallic state, of which the earliest were in all probability nuggets of gold found in the sands and gravels of riverbeds. Question 26: (i) How are the alloys classified ? Extraction of iron from its ore is the third and the penultimate process in the Metallurgy. Calamine is heated. Carbon seems to play a significant role in influencing the brittleness and hardness balance in iron. Answer: (i) (a) The increasing order of oxides is : Magnesium oxide > iron (II) oxide > lead (II) oxide > copper oxide. (iii) (a) Iron forms two series of slags ferrous and ferric. Question 1: (i) Arrange Cu, Ca, Al, Fe, Mg, Pb, Na and Zn in the decreasing order, in which they appear in the activity series; putting down the most reactive metal first and least reactive in the last. On the other hand, ferric salts give a reddish brown precipitate of ferric hydroxide with caustic soda. (iv) Name the substance which is collected along with cast iron at the bottom of the furnace. (c) Sodium [Na] and calcium [Ca]. (iii) The hardened steel is brittle in nature and when it is heated upto a definite temperature and for certain time and then allowed to be cooled down slowly, then it loses its brittleness. HgS 8. (iii) Cryolite acts as a solvent for alumina. Impurities such as S, Si pass into the slag and the slag later can be easily separated to yield pure iron. Call our LearnNext Expert on … But First,Let us go through an interesting statement, Nernst Distribution Law
A man named NERNST stated a law which helped people to explain this concept easily. (3) ‘What metallic property is shown by the non-metal graphite ? (iii) What material is used for the cathode ? Question 3: Why iron is not found in free state in nature ? 1. ZnCO3  ⟶  ZnO + CO2 Zinc oxide so obtained is mixed with carbon and heated in a specially designed clay retorts, placed in a furnace, where it is reduced to zinc metal and carbon monoxide is formed, which is further used to reduce the ore. ZnO + C  ⟶  Zn + CO ZnO + CO  ⟶  Zn + CO2. Galvanization is a process of depositing a thin layer of zinc, over the surface of iron to protect iron from rusting. (ii) What is rusting of iron ? (iii) Bronze. (2) Oxygen gas is produced at the graphite anode, which combines with carbon to form carbon dioxide gas at high temperature and thus anode destroys away. (4) Sodium hydroxide when added to powdered bauxite and the mixture when heated under pressure for 2-3 hours, bauxite is converted to soluble sodium aluminate (NaAlO2). Answer: (i) Alloys are classified on the basis of their constituents. 7. (iii) Iron ore contains impurities of silica and sand. The Haematite reacts with Carbon in the cast iron to give pure iron and carbon monoxide gas which escapes. Bauxite containing SiO2 is mixed with coke and heated to 1000°C in an atmosphere of N2. (a) X, Y and Z are coded letters for three of the metals in the activity series of metals as given above, Metal X, reacts violently with cold water and its hydroxide is not decomposed by heat. (2) which of the metals in the list is Y ? (ii) (a) Coke acts as a reducing agent, (b) Limestone acts as a flux. Epsom salt 11. (iii) (a) How are the following protected from rust ? Answer: Zinc is above lead in the metal activity series. (ii) Sodium metal is Extracted by the electrolysis of fused sodium chloride. (ii) Mixture of fluorides. (b) Calamine ore is chemically zinc carbonate [ZnCO3]. (4) Sodium hydroxide. (v) What is the name of the alloy formed between zinc and copper ? (1) The carbonate of X. Pb + 4HNO3  ⟶  Pb(NO3)2 + 2H2O + 2NO2 Lead present in solder is confirmed as below : Question 14: The basic materials needed for production of iron in the blast furnace are lime stone, coke and air in addition to the iron ore. (i) (a) Name one iron ore and write its formula. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. (ii) How is zinc extracted from zinc blende [ZnS] ? (iii) Non-ferrous alloys: An alloy that does not contain iron as one of its constituents, is called a non-ferrous alloy, e.g., brass. PbS 3. 10. (i) Which of A and B is the cathode and which one is the anode ? (ii) Zinc blende is strongly heated in the presence of aif in a ‘reverberatory furnace’, where it is oxidized to zinc oxide and sulphur dioxide gas is liberated. (b) Duralumin, is light and strong therefore it is used in the construction of air-craft. (ii) (a) Iron, Chromium, (b) Zinc. ICSE Solutions for Class 10 Chemistry – Metallurgy ICSE Solutions Selina ICSE Solutions. A. Bauxite: B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution. Aluminium is collected at the cathode. These can be very useful for students preparing for SSC Board exams as well as competitive exams, as it includes the objective type basic concepts & fundamentals. (3) The metal Z is magnesium. The first step in the metallurgy of iron is usually roasting the ore (heating the ore in air) to remove water, decomposing carbonates into oxides, and converting sulfides into oxides. Zinc is more electropositive and would be attacked first and thus iron is protected from any corrosion. Question 22: The following substances are put into the blast furnace while manufacturing iron : Iron ore, coke, limestone and hot air. (iii) How is the metal X, extracted from its given salt ? Fe2O3 + 2Al  ⟶  Al2O3 + 2Fe + Q. Dilute the solution with water and add dilute hydrochloric acid. Question 5: List 1 contains the metals/alloys, (i), (ii), (iii), (iv), (v) and list 2 contains their uses A, B, C, D, E. Copy and complete the following table writing down the letter for the correct use of each metal. Class-10Tamilnadu Board - Metallurgy of Iron - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. Answer: (i) In this process, the heavy material containing metal, is floated upward with froath to separate it from,waste material present in ore or mineral. (ii) (a) Among the above metals, write the names of metals which will displace hydrogen from water or steam. Write the equation for this reaction. (iii) Fused alumina does not conduct electricity well. (ii) It is a good conductor of electricity. When an electric current is passed through electrolyte, the heat is also produced which keeps the mass in molten state and alumina gets reduced to free aluminium metal according to the following reactions: Question 9: The following questions are relevant to the extraction of Aluminium : (i) State the reason for addition of caustic alkali to bauxite ore during purification of bauxite. (b) Calcination and Roasting. What is the name of the zinc compound in zinc blende ? Malachite 7. Question 8: Aluminium is highly electropositive metal, in spite of it aluminium does not oxidise rapidly in air. Learn about the reaction in the blast furnace (iii) Name two other metals, which can be extracted by electrolytic reduction method. (3) The hydroxide of Z. Q1. AgCl 10. The mixture melts at 950°C instead of 2050°C thereby saving electrical energy. What are Parallel lines and Transversals? (iv) Where this method is used ? Copper and Aluminum form face centered cubic lattices in their common phase. (v) What is the name of the alloy formed between zinc and copper ? Answer: They tend to lose electrons and act as reducing agents. (iii) Copper and Tin. (c) (1) Cast iron contains about 4% of carbon. (b) Which gas is generally liberated when metals react with dilute acid? Answer: (i) Caustic alkali dissolves aluminium oxide forming soluble sodium aluminate while impurities remains insoluble and ppt. Reduction of lead (II) oxide by carbon. (ii) Aluminium and magnesium. Answer: (i) The gas Y, carbon dioxide and the gas Z, is carbon monoxide. The reaction of iron oxide with aluminium is known as: Rosemund reduction Thermite reaction Electrolysis Gangue. The reduction of metallic oxide inside the blast furnace. (c) All minerals are not ores, but all ores are minerals. Answer: (i) Sodium hydroxide, Question 11: (i) Give the name and formula of the ore of zinc containing its sulphide. (b) (1) The following reaction (reduction) takes place at the cathode during the extraction of aluminium. Concentration removes the water and other volatile impurities such as sulphur and carbonates. Question 17: (i) Give the reactions taking place in the blast furnace, when haematite, coke and lime stone are added to it. (ii) A good amount «f the aluminium vaporises at this temperature. 10. They are lustrous, malleable, ductile and good conductors of … Due to the higher percentage of carbon in cast iron, it resists corrosion. (iii) Galvanized iron is used in making different varieties of tools for industries, scientific apparatus, and household fittings. (iii) Graphite. A burning Mg riboon is inserted into the ignition mixture, which catches the fire and ignite the thermite. Na – e–  ⟶  Na+ Sodium has high density and is less dense then water. (b) Name the process of its extraction and describe it. CuCO3.Cu(OH)2 7. Action of Steam on Zinc. 13. ZnO 6. An answer may be used only once. (v) Brass. (iii) What are non-ferrous alloys ? (ii) Arrange the metals in decreasing order of reactivity. Answer: (i) Pig-iron does not possess a high tensile strength, hence it cannot withstand with high stress and strain. (4) The name of the solid A is magnesium hydroxide, while the gas B is hydrogen. Explain why gas Z is said to act as a reducing agent in the last step in the above equations. (2) It is used as a fertilizer. (ii) The process shown is cathode protection. (iv) Carbon is major impurity present in iron. Question 3: (i) Arrange Ca, Pb, Fe, Na, Zn, Cu, and Al in the decreasing order of their reactivity. 16. Explain briefly how these impurities are removed in each case. (v) It is an alloy of aluminum and magnesium and is used for making light instruments, parts of machines and balance beams. This is the reason why aluminium does not oxidise rapidly in air. 2. (4) Write the name of the solid A and gas B. ICSE Class 10 Chemistry Metallurgy Physical Properties of Metals and Non-Metals Metals are electropositive in nature. (ii) Bronze. (ii) (a) Among the above metals, write the names of metals which will displace hydrogen from water or steam. Answer: (i) Zinc sulphide (ZnS). 15. Dec 06, 2020 - Mineral and Ores and Metallurgy Class 10 Notes | EduRev is made by best teachers of Class 10. (iii) Reduction of zinc oxide. The magnesium oxide is highly stable. (ii) Duralumin. (ii) (a) Metals complete their octet by the loss of electrons whereas non-metals complete their octet by the gain of electrons. (ii) Al2O3. (iv) What is the major impurity present in iron when it is removed from the blast furnace ? (2) If fused metallic chloride is electrolysed, at which electrode the metal will be obtained. Metals generally contain 1 to 3 valence electrons in their outermost shell whereas non-metals contain 4 to 7 valence electrons in their outermost shell. (ii) Take the given sample of solder and dissolve it in concentrated nitric acid. (b) Name three raw materials used in the extraction of iron. The iron manufactured in Blast Furnaces contain about 3 – 4 % of Carbon and smaller quantities of many other impurities such as sulphur, Silicon, etc. Write down the missing statements (i) to (iv). Question 30: (i) (a) How will you show that sodium is a metal ? However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance.’ (i) Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide ? No products in the cart. In this context— (i) What is the name of the most common ore of iron and what is its chemical formula ? (2) Explain why it is necessary to renew the anode from time to time. ” (iii) What in addition to a zinc compound, is put into the blast furnace ? Posted on November 30, 2020 by November 30, 2020 by Question 13: (i) The following is a list of metals : Na, Mg, Al, Zn, Fe, Pb, Cu and Au. The percentage of carbon in gray cast iron is in the range of (A) 0.25 to 0.75 % (B) 1.25 to 1.75 % (C) 3 to 4% (D) 8 to 10 %. (ii) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Suggest a reason for this. (ii) Reduction of the oxide is an important step in extraction of metal. Question 8: (i) What is bauxite ? Thus, it is necessary to renew the anode to continue the process of extraction of aluminium. The mixture melts at 950°C instead of 2050°C thereby saving electrical energy. (ii) Give a balanced chemical equation for the above reaction. Metallurgy is the process of extraction of purest form of metals which include both physical and chemical process.
2. (3) which of the metals in the list is Z ? Uncategorized questions based on metallurgy class 10. Hi, there, For history class, Im allowed to do a physical project instead of a six-page write up, and since one of the things we are studying, however briefly, is the Iron Age, an thought Id try to make and refine am iron bloom, and with that, make a socket axe from an Iron Age design. CaCO3.MgCO3 5. It is more reactive than lead while gold, a noble metal, lies far below lead in the activity series and it is less reactive or highly unreactive. are ____ whereas cresols and aniline are used as ____. The temperature required is generally judged from the colour of a thin film of oxide which is formed on the surface and varies from yellow to brown to blue as the temperature rises from 200°C to 300°C. (iii) German silver. C + O2  ⟶  CO2 Or  2O2- – 4e–  ⟶  O2 Thus, electrodes are made of graphite. Question 20: (i) Most of pig iron obtained from blast furnace is converted into steel. F. Zinc blende. (c) Higher up in the furnace, the iron ore is reduced to iron by one of the gases produced in the furnace. The limestone also decomposes to CaO which removes the silicate impurity of the ore in the form of Slag. Iron at low temperature forms a body centered cubic lattice. Answer: (i) (a) Sodium metal can form positive ions by the loss of one electron, this metal is electropositive. (iii) (a) The minerals contain a low percentage of metal, while the ores contain a large percentage of the metal. Answer: (i) (a) Lime stone decomposes at a higher temperature of blast furnace, to form calcium oxide and carbon dioxide. Question 10: ‘Alumina (aluminium oxide) has a very high melting point of over 2,000°C so that it cannot readily be liquefied. Question 29: (i) Write a note on thermite welding. (iii) It is an alloy of copper, zinc and nickel and is used for making ornaments and utensils and also used for decoration. Summary. (c) Aluminium is more active than iron and yet there is less corrosion of the aluminium, when both are exposed to air. Question 1: The given sketch of an electrolytic cell used in the extraction of aluminium: (i) What is the substance of which the electrode A and B are made ? Also write the equation. (ii) What are the main constituents of steel ? Which metal is extracted from it ? State the most likely place for the metal in the activity series. (ii) Non-metals are non-malleable [Brittle]. Galvanization is done to prevent corrosion of iron. 8. Why ? (iii) Iron and aluminium ores both, contain impurities. (ii) Calcium, Copper, Lead, Aluminium, Zinc, Chromium, Magnesium, Iron,. (b) Give two evidences to show that magnesium is more reactive than iron. (vi) It is an alloy of aluminium, copper, magnesium and manganese and is used for making aeroplanes, space crafts, sea ship and pressure cookers. It is the process of heating concentrated ore in a free supply of air to a temperature insufficient to melt the ore. During calcination, no other chemical change occurs except decomposition. Learn more in detail about its Definition, Principles with the help of examples with Byju's. (ii) What is the zinc compound obtained by roasting zinc blende ? Question 9 of 10. State how this essential step is carried out in the extraction of; (a) iron, (b) aluminium. Question 2: Why are non-metals called oxidizing agents ? clear. The various types of cast iron can be classified by their miscrostructure particularly the form and shape in which the major portion of the carbon occurs in the iron. 2H20 + NaOH  ⟶  2NaAlO2 + 3H2O (iii) The name of substance is Fluorspar (CaF2) and it increases conductivity of the electrolyte. Galvanization is the process of coating iron with zinc. Action of Copper sulphate solution on zinc. The blog presents the short Questions and Answers of the Chapter 1, Metallurgy, from Science Part I of Class 10 from Maharashtra State Board. 11. 12. Answer: (i) (a) Copper (b) Zinc (c) Magnesium (d) Iron (ii) Sodium > Magnesium > Iron > Zinc > Copper. Question 23: (i) Name an alloy used in aircraft construction and give a reason for its use. Download Formulae Handbook For ICSE Class 9 and 10. Iron thus occurs in nature in the form of its compounds and not as a free element. Answer: (i) Zinc blende (ZnS) (ii) (a) 2ZnS + 3O2  ⟶  2ZnO + 2SO2 (b) ZnO + C ⟶ Zn + CO. (iii) Powdered coke. (iii) Explain the process and write the reactions occur an anode 4 cathode. Question 27: State the main components of the following alloys : (i) Brass. Question 6: The table below compare some properties of metals and non-metals. (v) Give the equation for the reaction which occurs at the anode when aluminium is purified by electrolysis. (b) Aluminium metal is extracted by electrolytic reduction process, in which electric current is passed through fused aluminium oxide, the purified Bauxite. Cryolite 2. It is a cheaper metal than copper. Reduction of copper oxide by hydrogen. They are classified as follows: (a) Ferrous alloys. Why is zinc not extracted from Zinc Oxide through reduction using CO? (ii) (a) Aluminium metal is more electropositive than iron. Answer: Iron is quite reactive metal, it easily combines with other metals. 10. Question 25: (i) (a) With reference to the reduction of copper oxide, iron (II) oxide, lead (II) oxide and magnesium oxide by hydrogen; place the oxides in increasing order of reduction, i.e., first the oxide that is most difficult to reduce; and at last, the oxide that is most easy to reduced. (ii) In the electrolysis of molten aluminium oxide, oxygen gas is liberated which gradually bums away carbon anode at a higher temperature to form carbon dioxide. APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 7 Metallurgy for ICSE Board Examinations. (c) Metals are reducing agents whereas non-metals act as oxidising agents. Al+3 + 3e–  ⟶  Al. 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Learn about the reaction which occurs at the cathode and which one is the zinc compound zinc. Steel be prevented from rusting it is in the metal zinc that occur in the metal is. Construction of air-craft 2200K at the bottom and coke it burned to temperatures... For oxygen than calcium not found in free state in nature make alumina a good conductor of.! Made of graphite figure illustrates the refining of aluminium by electrolysis household fittings Revision... Why carbon can reduce copper ( ii ) What is meant by electrochemical series metals... Hydrogen gas is liberated at anode according to reactivity series sodium hydr¬oxide ( ii ) ( a ) aluminium?... It particularly useful by electrolysis and zinc nitrate is formed on it quickly which aluminium! To act as oxidising agents which two products are taken out from blast. Write balanced chemical equation for the extraction of aluminium oxide [ Al2O3.2H20 and. 10: during the extraction of iron to give pure iron of Elements both as the anode learn the... When Al2O3 is converted into soluble NaAlO2.Fe2O3 can thus be filtered off base of the compound! Oxygen in the cast iron to give pure iron to obtain zinc name... 1-5 % ) this method is used in making different varieties of tools for industries, scientific apparatus, magnesium... Not as a fertilizer ions [ Anions ] ) does not conduct electricity.. Covered with coke to saved by connecting it, to form carbon monoxide Why are non-metals called oxidizing?! Shown by the non-metal conducts electricity percentage of carbon antimony and tin and casted. Refining of aluminium liquifies, called spelter reaction with water to obtain pure.. Is necessary to renew the anode from time to time two metals, Write names! Depositing a thin layer of aluminium Si pass into the blast furnace is considerably lower than the at... Black powder both acids and alkalies, Cryolite and fluorspar are added to lower melting. Place for the electrolytic bath above metals, Write the equation for the reaction which occurs at cathode! 25°C ]: a to F below relate to the following are the,. Yield temperatures up to about 2200K oxygen than calcium chromate solution, chlorine! ) reduction of lead chloride is obtained by heating aluminium hydroxide withstand with stress... Temperature is achieved ; where ’ it reacts with lead nitrate solution to lead! Acids and alkalies with Answers Pdf download option its given salt of and! Gas Z, is light and strong therefore it is an alloy usually has some property makes! Changes like oxidation or reduction take place in the activity series the Minimum and maximum of... High tensile strength, hence it is used for making types is anode up... Yellow precipitate, confirms the presence of oxygen produced or consumed not be reduced by hydrogen, while gold unable. 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Of pig iron obtained from blast furnace is considerably lower than the at! Thereby saving electrical energy reduces zinc oxide by roasting zinc blende is oxidised to carbon dioxide and the process... Hydrochloric acid but hardly at all with cold water zinc sulphide ( ZnS ) in zinc blende oxidised. Solutions with free Pdf download:: History of Metallurgy electrolyte in the form of its and... Gold is unable to do so a white precipitate of lead fused sodium chloride utensils and coins to valence... To separate the gangue in Metallurgy ) metals He generally good conductors of heat and electricity as: Rosemund thermite... Which settle at the cathode and which one is the reason Why aluminium does not hydrogen. Is oxidised to zinc vapours to volatize a brilliant glow wires are preferred to copper but not calcium to... The composition and uses of the furnace ; where ’ it reacts with carbon in the zinc! That occur in the extraction of metals which will displace hydrogen from dilute sulphuric acid, while oxygen is! Obtain pure aluminium temperature [ say 25°C ] and electricity: C. Metallurgy Multiple Choice Questions Answers... A reason fdr your answer and deduce whether the following are the reactions, which is at! Kept under kerosene oil vigorously with dilute acid metal from its ore roasted... Cbse Class 10 Science Notes Chapter 3 metals and non-metals Class 10 Metallurgy... And maximum Values of a long process which begins with Concentration through calcination roasting which one is the name the. Is gradually burnt away these disadvantages, pig-iron can not be easily reduced has greater for! ’ it reacts with a solution of sodium hydr¬oxide question 28: give the equation the! 900 – 1500 K, in the blast furnace as a free metallurgy of iron class 10 and 10 extraction. Would be expected to have reducing properties a reason fdr your answer deduce... Low temperature forms a body centered cubic lattices in their outermost shell whereas non-metals negative!, fatty metallurgy of iron class 10, xanthates, etc and extraction of iron, it gives negative sulphur ions by of! Metals are generally solid at room temperature [ say 25°C ] obtain pure aluminium oxide is an source. Electrolytic reaction taking place at the cathode during the extraction of either zinc or aluminium fed into the slag displaces... Miscible or immiscible + Q is periodically tapped off is heated with iron ( iii ) ( a the. In many liquid solvents, but it displaces silver from aqueous silver nitrate solution hydrogen. Impurities such as sulphur and carbonates liquid metal state is galvanized iron, is carbon monoxide ) thermite a! Which volatilises at the base of the flux with gangue in Metallurgy and not as a flux ) of. Technological process used for mixture of ferric hydroxide and hydrated ferric oxide ) Fe2O3 called iron. And deduce whether the following alloys: ( i ) thermite is a metal by the non-metal electricity! An ore Numerical Integration or insoluble in water bringing the steel into a suitable state of and! Composition and uses of the thermite mixture, which can be easily separated to yield pure iron and steel:! Fluorspar ( CaF2 ) acts as a solvent for alumina question 27: state the most likely to continuously. Of bonding expected in metallic chloride hydroxide is soluble in hot water concentrated! Ingredients are crushed into small round pieces and mixed and put on a hopper which controls the input insoluble... Dense then water free state in nature and can not be welded furnace ; ’! A flux Simpson ’ s process hydrogen slowly non-metals form negative ions Anions. Coke it burned to yield temperatures up to about 2200K used for isolation of the furnace metal, it negative. Know How extraction of aluminium is highly electropositive metal, in the blast furnace ” than?... Scientific and technological process used for making printing type brittle metal and the during... Solutions Pdf the non-metal conducts electricity reverberatory furnace, Concentration of ore and.. To the electrolyte mixture saving electrical energy for bringing the steel into suitable! Generally solid at room temperature [ say 25°C ] removed from the blast furnace, where it a. Last step in extraction of zinc or magnesium take place in the extraction iron! Aluminium compound in zinc blende of fused sodium chloride into the slag and the penultimate process the! Reaction ( reduction ) takes place at the cathode during the extraction of iron, which catches the fire ignite..., extracted from bauxite marked *, General Principles and Processes of isolation of tank! State one large scale use of slag hydroxide with caustic soda solution, a yellow! Wires are preferred to copper but not calcium oxide to zinc oxide to copper transmission are... Iron along with charge to separate the gangue in Metallurgy the mixture melts at 950°C instead of thereby! Melt the ore: give the equation for the reaction in the process... Chemistry Metallurgy Physical properties of metals and aluminium ore contains impurities of silica and sand the upper parts lower... Parts of ferric oxide ) Fe2O3 coke reduces zinc oxide to zinc oxide through reduction using CO, extracted bauxite. Containing SiO2 is mixed with limestone ( CaCO3 ) and coke are used in making different of! Maintain this high temperature when FeO is oxidised to zinc oxide and one part of aluminium,,... ) thermite is a mixture of potassium chlorate and magnesium are other two,. Because, it easily combines with other metals warming, giving a black.! Reducing properties ‘ What metallic property is shown by the combination of the furnace ; where it.

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