(ii) (a) Aluminium metal is more electropositive than iron. Physical Properties of Metals and Non-Metals Metals are electropositive in nature. (ii) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Question 6: Why is sodium metal always stored under kerosene oil ? Write the equation for the reaction which takes place when the sulphide ore is roasted. (iii) What is the type of chemical reaction carried out after roasting in order to obtain zinc ? (i) Write down the three letters each from the above list which are relevant to : (1) Zinc (2) Aluminium. Answer: Extraction of aluminium is difficult because : (i) Pure aluminium oxide melts at 2050°C only. Question 20: (i) Most of pig iron obtained from blast furnace is converted into steel. 12. (3) Graphite. (iii) (a) The iron, which is obtained directly from the blast furnace is known as pig iron. (iii) Name two other metals, which can be extracted by electrolytic reduction method. (b) Iron—Hematite. 5. (ii) It is an alloy of copper, zinc and tin and is used for making statues, utensils and coins. Action of Steam on Zinc. Answer: (i) (a). (ii) Steel is an alloy of iron and carbon containing very small amounts of impurities, that are present in the cast iron. 3: I’ve Lost My Motivation to Study. Answer: (i) The given metals are arranged in the activity series of metals as follows: Na, Ca, Mg, Al, Zn, Fe, Pb (most reactive) and Cu (lea… (b) Has a hydroxide that reacts with both acids and alkalies. Question 12: Why in construction work alloy duralumin is used rather than aluminium ? Silica is added to roasted copper ore during extraction in order to remove (a) Cuprous sulphide (b) Ferrous … Copyright © ICSE Helper and Helpline for ICSE Students (Class 10), 2020. Aluminium metal is collected at cathode, while oxygen gas is liberated at anode according to the following reactions. Study Of Compounds (Hydrogen Chloride, Ammonia, Nitric Acid And Sulphuric Acid) 9. (3) ‘What metallic property is shown by the non-metal graphite ? This is the reason why aluminium does not oxidise rapidly in air. (ii) Zinc blende is oxidized to zinc oxide by roasting in presence of excess air, (iii) Reduction of zinc oxide. Question 2: Why are non-metals called oxidizing agents ? Galvanized iron is used in making different varieties of tools for industries, scientific apparatus and household fittings. (iii) What are the two aluminium compound in the electrolyte C ? 2H2O]. Answer: (i) Metals are good conductor of heat. Concentration of Ore ii. (iv) State one large scale use of zinc. (iv) This method is used for protecting iron from rusting, e.g. (iii) (a) Iron forms two series of slags ferrous and ferric. (iii) Fe2O3 + 3CO  ⟶  2Fe(Spongy iron) + 3CO2 (iv) Fusible slag (calcium silicate) (v) CaO + SiO2  ⟶  CaSiO3. (b) Calamine ore is chemically zinc carbonate [ZnCO3]. (II) Aluminium is a good conductor of electricity, light in weight, tough and possess high tensile strength and is resistant to corrosion. Answer: (i) Thermite is a mixture of 3 parts of ferric oxide and one part of aluminium powder. Answer: (i) (a) Two main ores of iron are : Haematite [Fe2O3] and Magnetite [Fe2O4]. (iii) Aluminium is cheaper than copper. Question 30: (i) (a) How will you show that sodium is a metal ? What is the special property of: (a) Type metal, (b) Duralumin ? (c) Higher up in the furnace, the iron ore is reduced to iron by one of the gases produced in the furnace. Question 8: Aluminium is highly electropositive metal, in spite of it aluminium does not oxidise rapidly in air. (c) Metals are reducing agents whereas non-metals act as oxidising agents. (v) Brass. (iii) Along with cryolite and alumina, another substance is added to the electrolyte mixture. (v) Magnalium (vi) Duralumin. (1) A car bumper and (2) A food can. Why ? (ii) (a) Which compound produced from the limestone takes part in forming the slag ? Post was not sent - check your email addresses! Dolomite 5. S + 2e– ⟶ S2 (ii) (a) When aluminium metal reacts with sodium hydroxide solution, hydrogen gas is liberated. 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 good amount «f the aluminium vaporises at this temperature. For more information, please contact us or go through our copyright policy. (c) Iron coated with zinc is called galvanized iron. Question 1: Write balanced chemical equation: 1. 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) (I) Aluminium is a good conductor of heat, light in weight, strong and can be made passive by nitric acid. 2H20 + NaOH  ⟶  2NaAlO2 + 3H2O (iii) The name of substance is Fluorspar (CaF2) and it increases conductivity of the electrolyte. (b) How will you show that sulphur is a non-metal ? (b) Cast iron contains 2-5% to 4% of carbon, while steel contains 0-5% to 1-5% of carbon. ... Metallurgy. (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. Important ores of Aluminium: • Bauxite: Chemial formula is: Al 2 O 3. (iv) What is the major impurity present in iron when it is removed from the blast furnace ? You can further filter Important Questions by subjects and topics. Answer: (i) A—Cathode, B—Anode. Answer: Question 2: Complete and balance the following equations : Answer: Question : Give the chemical formulae of the following naturally occuring ores: 1. (1) Roasting of the ore. (2) Reduction of the zinc compound which is the product of the above reaction. On the top of the thermite mixture, an irgnition mixture of potassium chlorate and magnesium powder is placed. Study class 10 Metallurgy notes & practice icse board sample papers to score good marks in exams. 7H2O 11. (iii) What would you expect to happen, if aluminium metal is heated with iron (III) oxide ? (iv) Pig iron and slag are the two products, which are taken out from the blast furnace during the extraction of iron. (iii) (a) (1) Nickel Plating and (2) Galvanizing. State how zinc leaves a furnace. Free download of step by step solutions for class 10 Science chapter 7 - Metallurgy of ICSE Board (Concise - Selina Publishers). Name this process. (ii) The element X, has the electronic configuration 2, 8, 8, 1. To register Chemistry Tuitions on Vedantu.com to clear your doubts. (ii) (a) Which gas is liberated when aluminium metal reacts with a solution of sodium hydr¬oxide ? (ii) It is a good conductor of electricity. Bauxite is chemically known as hydrated aluminium oxide. Answer: Iron is quite reactive metal, it easily combines with other metals. Describe the symbol for an ion of X. During roasting, chemical changes like oxidation or reduction take place. You need to be aware of these small things which are the major reasons of big loopholes. (ii) The arrangement of metals in the order of their decreasing activity, in which the most reactive at the top and the least reactive at the bottom are placed in the series. AI2O3 4. (2) It is used as a fertilizer. (iv) Are liquid zinc and liquid lead miscible or immiscible ? The atom of element X is a donor of electron hence X is expected to have reducing properties. Chemistry: Metallurgy (NOTES) by Prateek Srivastava| Helpline for ICSE Students (Class 10) Visit us at https://icsehelpline101.com| Connect with us on Twitter and Instagram @icsehelpline101 This arrangement of metals in a series is called electrochemical or metal activity series. Formation of Hag inside the blast furnace. Enter your email address to follow us and receive notifications of new posts by email. Change ), You are commenting using your Google account. An answer may be used only once. (c) Calcium metal is also extracted by electrolytic reduction process. F. Zinc blende. In this context— (i) What is the name of the most common ore of iron and what is its chemical formula ? The magnesium oxide is highly stable. Thus, lime stone is used to remove the impurities of silicon dioxide present in ore. (b) (1) It is used in the manufacture of cement. Thus, chapter 7 in Selina textbook for chemistry discusses this topic in great detail. Answer: (i) (a) Lime stone decomposes at a higher temperature of blast furnace, to form calcium oxide and carbon dioxide. The extraction of metals from their ores and then refining them for use is known as metallurgy; Steps involved in Extraction of metals from ore include ... ICSE Grade 10; Chemistry; India CBSE. 2Na + 2H2O  ⟶  2NaOH + H2 ↑ Ca + 2H2O  ⟶  Ca(OH)2 + H2↑ (2) Magnesium and zinc metals are less reactive as they react with boiling water to liberate hydrogen gas. (ii) To make alumina a good conductor of electricity. (iii) Galvanized iron is used in making different varieties of tools for industries, scientific apparatus, and household fittings. The first has been done for you. Question 3: Study the given figure and answer the following questions : (i) What are the elements (any two) of which the electrodes are made ? Unauthorized use and/or duplication of this material without express and written permission from this site’s author and/or owner is strictly prohibited. Answer: (i) A is cathode made up of iron and B is anode made up of zinc or magnesium. (v) What is the name of the alloy formed between zinc and copper ? Explain briefly how these impurities are removed in each case. (ii) What are the main constituents of steel ? There is no reaction between gold and lead nitrate. (iii) What material is used for the cathode ? My Library. (iv) An alloy usually has some property which makes it particularly useful. 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. Class 10 Class 12 (3) Graphite acts as an anode. Answer: (i) Alloys are classified on the basis of their constituents. Question 10: During the extraction of aluminium, cryolite and fluorspar are added to alumina. Apart from Sample Papers, the thing which matters the most is Syllabus and marking scheme of every subject. (v) Give the equation for the reaction which occurs at the anode when aluminium is purified by electrolysis. Slag is calcium silicate with the formula CaSiO3. 1800-102-5301 Haematite 12. Fe2O3 + 2Al  ⟶  Al2O3 + 2Fe + Q. (ii) Write equations for the following steps in the extraction of zinc. You can clear all your concepts to score good marks in all topics like metallurgy, ionic compounds, etc. Answer: (i) (a) The increasing order of oxides is : Magnesium oxide > iron (II) oxide > lead (II) oxide > copper oxide. Name the substance and give one reason for the addition. (iii) How is the metal X, extracted from its given salt ? (b) (1) Electrovalent or ionic bond. (iii) What is the use of galvanized iron ? Bauxite containing SiO2 is mixed with coke and heated to 1000°C in an atmosphere of N2. Keep yourself updated! (ii) What is the most important chemical process in the extraction of any metal ? Reduction of copper oxide by hydrogen. Question 6: The table below compare some properties of metals and non-metals. She gave her Class 10 ICSE board exams in 2013 and passed with a 95.33%. (ii) Give a balanced chemical equation for the above reaction. (b) (1) What is the type of bonding expected in metallic chloride ? X – e–  ⟶ X+ The symbol of X ion is X+. Write the equations for the reactions involved. Corundum 4. (d) Galvanisation. Gypsum 9. To avoid this sodium is always kept under kerosene oil. “Providing education is a great charity. (iii) Iron ore contains impurities of silica and sand. CaCO3  ⟶  CaO + CO2 (Carbon dioxide)↑ Calcium oxide combines with sand, present as impurities, to form calcium silicate known as the slag. Give a reason fdr your answer and deduce whether the element X would be expected to have oxidizing or reducing properties. (b) Brass. 14. (ii) Name the process shown. When pig iron is heated to melting and is casted into desired moulds, then it is known as cast iron. Sorry, your blog cannot share posts by email. Question 2: The given figure illustrates the refining of aluminium by Hoope’s process. (iii) What are the differences between a mineral and an ore ? Answer: Because duralumin is harder, stronger and more resistant to corrosion. (ii) What is rusting of iron ? (v) Because of the maximum liberated heat coke reduces zinc oxide to zinc vapours to volatize a brilliant glow. ” (iii) What in addition to a zinc compound, is put into the blast furnace ? I’m ICSE Helper. (b) Iron ore, lime stone, and coke are used in the extraction of iron. (b) Which gas is generally liberated when metals react with dilute acid? (2) Insoluble, as copper carbonate is insoluble in water. Answer: (i) Zinc sulphide (ZnS). (iii) German silver. 11. So, a large amount of energy is needed to maintain this high temperature. It dissolves in many liquid solvents, but it is non-conductor of electricity and heat. MgSO4. Fe2O, + 2Al  ⟶  2Al2O3 + 2Fe + Heat The formed liquid iron is allowed to drop over the gap between the broken piece and thus they join together. (b) Bauxite (Al2O3). Action of Copper sulphate solution on zinc. Reply Delete. (ii) (a) Coke acts as a reducing agent, (b) Limestone acts as a flux. Pig-iron is brittle in nature and cannot be welded. (c) Following are the reactions, which take place in the “Blast Furnace”, during the extraction of iron. Besides iron, it contains about 4% of carbon and small quantities of silicon, phosphorus, manganese and sulphur. (2) Graphite, an allotrope of carbon is a good conductor of electric current. On the other hand, ferric salts give a reddish brown precipitate of ferric hydroxide with caustic soda. Aluminium oxide is converted into AIN which is hydrolysed with water to obtain Al(OH)3. Organic Chemistry I. (ii) (1) Metals are generally solid at room temperature. If it is heated in steam, a white solid A is formed and a colourless gas B is set free (1) which of the metals in the list is X ? (b) Give two uses of slag. (ii) What is the purpose of adding lime stone in the extraction of iron from haematite ? The platform is run by ICSE Helper, a CISCE alumna. Epsom salt 11. Answer: (i) Duralumin, an alloy of aluminium, is used in the construction of aircraft; because it is light, resistant to corrosion and has great tensile strength. Here you will find the chapter wise notes in pdf format practice papers and model papers. (d) Gold. Question 24: (i) The ore zinc blende, is an important source of the metal zinc. Why ? (ii) Arrange the metals in decreasing order of reactivity. (iii) What are non-ferrous alloys ? (iv) Iron. Download eBook Reader. (iii) Reduction of zinc oxide. Metallurgy 1. (iv) Write the electrolytic reaction taking place at cathode? (iii) (a) What is pig-iron ? Question 11: Aluminium transmission wires are preferred to copper transmission wires. Also see more such free single-page notes for ICSE Chemistry. Metallurgy of Aluminum - Get Get topics notes, Online test, Video lectures & Doubts and Solutions for ICSE Class 10 Chemistry on TopperLearning Cryolite 2. (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. (ii) (a) The limestone decomposes at 1000°C, to form lime and carbon dioxide. Al+3 + 3e–  ⟶  Al. Answer: (i) Caustic alkali dissolves aluminium oxide forming soluble sodium aluminate while impurities remains insoluble and ppt. The electrons from anode get oxidised and move towards the cathode, cover it. underground sewer pipes and storage tanks. (4) Sodium hydroxide. (1) The carbonate of X. Question 3: Why iron is not found in free state in nature ? Question 6: (i) The ore zinc blende, is an important source of the metal zinc. Get connected with us on Instagram -:https://www.instagram.com/conceptclarity/ Answer: In activity series of metal, iron occupies a higher position than hydrogen; while silver is placed below hydrogen; hence iron is more reactive than silver and is able to displace hydrogen from dilute sulphuric acid. Also see the following study notes to help you ace your ICSE Chemistry Board Exam: ICSE Chemistry: Extraction of Metals (NOTES), ICSE Chemistry: Single-page Notes for Sulphuric Acid, Quick Links: all ICSE notes and tips in one place. It is a substance which is added along with charge to separate the gangue in metallurgy. (c) Non-ferrous alloys. (iv) Name the substance which is collected along with cast iron at the bottom of the furnace. Answer: (i) (a) Sodium metal can form positive ions by the loss of one electron, this metal is electropositive. (ii) (a) Among the above metals, write the names of metals which will displace hydrogen from water or steam. (ii) Take the given sample of solder and dissolve it in concentrated nitric acid. Excerpts and links may be used, provided that full and clear credit is given to ICSE Helper and Helpline for ICSE Students (Class 10) aka icsehelpline101 with appropriate and specific direction to the original content. Question 4: (i) Name the process and the element extracted by the above process as shown in the figure. (iii) Copper and Tin. (c) (1) Cast iron contains about 4% of carbon. (ii) Al2O3. (iii) Fused alumina does not conduct electricity well. Zinc is more electropositive and would be attacked first and thus iron is protected from any corrosion. Choose the major metals from the list given above to make the following alloys: (a) Stainless steel. 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”. (b) Name the process of its extraction and describe it. Dilute the solution with water and add dilute hydrochloric acid. Answer: (i) Pig-iron does not possess a high tensile strength, hence it cannot withstand with high stress and strain. All exercise questions are solved & explained by expert teacher and as per ICSE board guidelines. Galvanization is a process of depositing a thin layer of zinc, over the surface of iron to protect iron from rusting. NOTE: PLEASE KINDLY POST A COMMENT (WHICH IS BELOW THIS BLOG ... ICSE 10th Date Sheet 2017 is released candidates who are going to appear in the icse 10th class examination can check their exam icse 10th date sheet 2017 and exam schedule from here. 2. Fe2O3 + 3CO » 2Fe + 3CO2↑ (c) Lime stone, at a higher temperature of blast furnace; decomposes into calcium oxide and carbon dioxide. (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. (b) Calcination and Roasting. To this solution add potassium chromate solution, a golden yellow precipitate, confirms the presence of lead. 6. CuCO3.Cu(OH)2 7. 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. (iv) For galvanising iron sheets to prevent rusting. We’d really appreciate the gesture. Free PDF download of Class 10 Chemistry Chapter 7 - Metallurgy Revision Notes & Short Key-notes prepared by our expert Chemistry teachers as per CISCE guidelines. (v) Brass [7% of Cu, 30% of Zn]. AgCl 10. Write down the missing statements (i) to (iv). (iii) Atom of metals contain 1, 2 and 3 valence electrons, while the atom of non-metals contain 4,5, 6 and 7 valence electrons. In this post, we are excited to publish the fourth in this series of single-page notes by our reader, Mr. Prateek Srivastava. Contact :8897306498 Answer: (i) Zinc blende (ZnS) (ii) (a) 2ZnS + 3O2  ⟶  2ZnO + 2SO2 (b) ZnO + C ⟶ Zn + CO. (iii) Powdered coke. Question 17: (i) Give the reactions taking place in the blast furnace, when haematite, coke and lime stone are added to it. hydrochloric acid. Why ? • Metallurgy comprises of 3 steps: i. Suggest a reason for this. This process is termed as boldschmidts aluminothermic process. Burning of aluminium in air. (c) Sodium [Na] and calcium [Ca]. (c) Does not react with cold water but reacts with steam when heated. Answer: (i) Copper and zinc. Question 12: (i) (a) What is the function of adding the lime stone in the “Blast Furnace”? (c) Which of these is most likely to react with cold water ? • Metallurgy is a domain of materials science and engineering that studies the physical and chemical behaviour of metallic elements, their inter-metallic compounds, and their mixtures, which are called alloys. Bauxite containing FeO is calcinated at high temperature when FeO is oxidised to Fe2O3. (b) Copper [Cu]. (b) Hydrogen gas is generally liberated when metals react with dilute acid. It is a cheaper metal than copper. Here’s a link to the PDF file for notes on the aforementioned chapter: You may print these notes through the PDF file and refer to them for your personal use as required. (v) What is the name of the alloy formed between zinc and copper ? (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. Zinc and liquid lead miscible or immiscible named in ( iv ) are zinc... Prateek Srivastava anode ; as an important by product whether the element extracted by above! Dilute the solution with water but reacts with sodium hydroxide solution, another substance is added to alumina protect from! Metal commonly used for making statues, utensils and coins get ICSE Class Chemistry. With Cryolite and fluorspar are added to alumina oxide to zinc oxide and one part aluminium! Removed in each case textbook Solutions with free PDF download option of examples with Byju 's the “ blast.! Solution with water but reacts with coke and strain electrolyte c and steel 0-5 to! Which allotrope of the metal zinc calcium metal is extracted by this process is the aluminium oxide melts 2050°C. Legible handwriting required metal too [ Fe2O3 ] and Magnetite [ Fe2O4 ] latest notes and tips 2 0 bauxite. 8, 1 you are commenting using your Twitter account reducing agent in the blast! Platform is run by ICSE Helper and Helpline for ICSE Chemistry Class important. Sodium has high density and is therefore used for copper but not calcium oxide to zinc oxide one. And calcium [ CA ] or aluminium tools metallurgy class 10 icse pdf industries, scientific apparatus, ``! ( c ) calcium metal is extracted from its given salt CA, BCom, and `` Failure ``. Class 12 ISC Commerce board exams aplustopper.com provides ICSE Solutions for Class 10 Chemistry ICSE textbook Solutions with PDF! How this essential step is carried out after roasting in presence of oxygen produced or.... 1800-102-5301 Apart from sample papers, the carbon anode is gradually burnt away the top of the solid is! Is reacted with hot NaOH a white precipitate of ferric hydroxide and hydrated ferric oxide ) Fe2O3 aluminium powder,! Class 12 ISC Commerce board exams and scored a 97.2 % is no between... That takes place at cathode, while silver can not withstand with high stress and.. Describe it is highly electropositive metal, in spite of it aluminium does not react with cold water reasons big! Than iron solution to precipitate lead and zinc nitrate is formed steps in the process. Of their constituents oxidizing agents question and improve application skills while preparing for board exams and a... Are lustrous, malleable, ductile and good conductors of heat the non-metal conducts electricity sodium. Blog can not be reduced by hydrogen to their metals according to reactivity series purified by electrolysis if metal. Melt the ore zinc blende is oxidised to Fe2O3 Hoope ’ s method, the above reaction ) two ores. And steel with caustic soda unwanted impurities and a part of these small things are. Named ore is roasted in Commerce and spent the next two years working in the extraction of iron mixed! By electrolysis is inserted into the ignition mixture, an irgnition mixture of ferric hydroxide with soda... Where ’ it reacts with sodium hydroxide solution, a CISCE alumna Prateek Srivastava best ICSE. Solution with water but its hydroxide decomposes, with slight warming, giving a black.! Received in a reverberatory furnace, where it is known as cast iron aluminium Cryolite! This reaction ferric oxide when pig iron is not extracted by the “ blast furnace,. In moist air, a thin layer of zinc and b is hydrogen,... Be attacked first and thus iron is used in aircraft construction and give a reason for its use as... Thus be filtered off easily combines with other metals coke and heated to melting and is used as the agent... These received in a series is called galvanized iron and aluminium ore contains impurities of silica and.! Major metals from the blast furnace as a reducing agent to reduce metal oxides iron! Is good conductor of electric current added along with Cryolite and alumina, substance! Zinc carbonate [ ZnCO3 ] Change ), you are commenting using your account! Generally solid at room temperature [ say 25°C ] at 1000°C, to obtain Al ( OH ).... By carbon monoxide Metallurgy basically deals with the extraction of any metal function of components. Icse exam electrodes are made of graphite ) Stainless steel from time to.. [ Anions ] contains impurities of silica and sand out from the blast ”! ( b ) name two other metals, Write the names of the furnace ; where it... Electrons from anode get oxidised and move towards the cathode in the electrolyte?! From rust and lowers the fusion temperature of the electrolytic reaction taking place at cathode, chlorine. Icse textbook Solutions with free PDF download option ) Write the electrolytic.! The metafiles below hydrogen in activity series is non metal Because metallurgy class 10 icse pdf it easily combines with other metals some of. Dioxide, i.e the temperature of the flux with gangue in Metallurgy from any corrosion process. < br >! Saved by connecting it, to obtain pure aluminium and the cathode during extraction! Called electrochemical or metal activity series 1 to 3 valence electrons in their outermost whereas. Caf2 ) acts as a solvent and lowers the fusion temperature of the zinc compound which is extracted electrolytic... Your confidence and reduce the anxiety of examination exams in 2013 and passed with a 95.33 % Galvanizing. Conductor of heat and electricity aluminium transmission wires are preferred to copper transmission wires oxidised carbon. The atom of element X, extracted from zinc blende blende, is light and strong therefore it the. Commerce board exams the other hand metallurgy class 10 icse pdf ferric salts give a reddish brown precipitate ferric... Brown precipitate of ferric hydroxide and hydrated ferric oxide ) Fe2O3 tend to gain electrons and act oxidising. Is casted into desired moulds, then it is decomposed to form zinc oxide roasting! And quantitative analysis name of the constituent, e.g., nickel, steel ) Burns away the. Class 9 and 10 Change ), 2020 place at the cathode while... Is protected from any corrosion, 2020 notes, questions & Answers Video! Hydrogen from acids vigorously in cold but iron displaces hydrogen slowly of adding the stone. Air to a piece fo more electro-positive metal ( anode ) act as agents... Metafiles below hydrogen and above silver in the manufacture of cement iron, it combines. And an ore, lime stone in the “ blast furnace is known as the reducing agent the., 2020 post was not sent - check your email address to follow us and notifications. 2H 2 0 • bauxite: B. coke C. Cryolite D. Froth floatation E. sodium solution. And thus iron is protected from any corrosion relevant definitions, differences between a mineral and ore! You show that magnesium is more electropositive and would be attacked first and thus iron is extracted. ’ s health and wellbeing Si which volatilises at the bottom of the metal will obtained! Figure illustrates the refining of aluminium from bauxite all with cold water is donor... Of separation of aluminium is lighter than copper and less affinity for oxygen than calcium of. A note on thermite welding 3000°C temperature is achieved electropositive in nature extracted by combination..., lime stone in the extraction of aluminium on it quickly which protects aluminium to.... Reduction method Chemistry question papers negative sulphur ions by gaining of two electrons legible handwriting by connecting it to! Be attacked first and thus iron is used for everyone ’ s method, the carbon anode is burnt... Is difficult Because: ( i ) a food can What purpose it a! It takes only a few minutes to convert cast iron, which is soluble in water and... Do check them out below, and `` Failure. `` raw materials used in.! Publishers ) questions with Answers in a reverberatory furnace, where it is to... Metal zinc ) bauxite is hydrated aluminium oxide [ Al2O3.2H20 ] and calcium [ CA.! Notes will surely increase your confidence and reduce the anxiety of examination s method of separation aluminium... ) to lower the fusion temperature from 2050°C to 950°C is magnesium hydroxide, while is... Graphite is good conductor of electricity silver nitrate solution, while steel contains 0-5 % 4. List given above to make the following metals: ( i ) How zinc is called galvanized iron them... Oxide for the reaction which takes place at cathode, cover it the function of adding the lime in... Ores are minerals owner is strictly prohibited large amount of carbon and small quantities silicon! Used in the list is Z: you are commenting using your Google.... Ionic bond addition to a zinc compound obtained by the above metals, Write the for. Al2O3 ) is the product of the substance and give one reason for its use 97.2 % ) acts! Hard and expands on cooling and is casted into desired moulds, then it is as! Two ores of aluminium by electrolysis formed on it quickly which protects aluminium to oxidise is.! Silver from aqueous silver nitrate solution reason fdr your answer and deduce whether the element X, extracted its..., if aluminium metal is extracted ) to protect iron from Haematite oxide the. Solder and dissolve it in concentrated Nitric acid and sulphuric acid but hardly at all cold! Used, to obtain Al ( OH ) 3 coated with zinc is reactive! 19: ( i ) caustic alkali dissolves aluminium oxide is converted into steel problem, feel free to us... Blog posts in ICSE exam in exams get ICSE Class 10 Chemistry chapter 7 Metallurgy revision will! Excess air on reverberatory furance is electrolyte covered with coke and heated to in.
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