For subject-wise notes and tips, check out our Quick Links page. On the other hand, ferric salts give a reddish brown precipitate of ferric hydroxide with caustic soda. Question 6: The table below compare some properties of metals and non-metals. A. Bauxite: B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution. Suggest a reason for this. C + O2 ⟶ CO2 CO2 + C ⟶ 2CO (b) Carbon monoxide so produced, reduces haematite ore [Ferric oxide] to metallic iron. Heating of aluminium hydroxide. (b) Calcination and Roasting. Answer: They tend to lose electrons and act as reducing agents. You can clear all your concepts to score good marks in all topics like metallurgy, ionic compounds, etc. 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. X – e– ⟶ X+ The symbol of X ion is X+. To avoid this sodium is always kept under kerosene oil. (3) Soluble, as magnesium hydroxide is soluble in water. Plus more on ISC Commerce, CA, BCom, and "Failure.". (b) Iron—Hematite. (ii) (a) Iron, Chromium, (b) Zinc. CaO + Si02 ⟶ CaSiO3 (Calcium Silicate) [Slag] The slag, is formed at the surface of blast furnace from where, it is removed from time to time. In Bayer’s method of separation of aluminium from bauxite ore, Bauxite ore is reacted with hot NaOH. It also increases conductivity alongwith fluorspar. Question 8: Aluminium is highly electropositive metal, in spite of it aluminium does not oxidise rapidly in air. ... ICSE Class 10 Chemistry 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. Answer: (i) Carbon (Graphite) (ii) A (iii) Aluminium oxide / Alumina / cryolite (sodium aluminium fluoride). 16. 14. Why ? (2) which of the metals in the list is Y ? Chemistry Class-X 1 Questions Bank Question Bank Metallurgy II 1. Bauxite Answer: 1. (2) Which allotrope of the non-metal conducts electricity ? Why is an electrolyte able to conduct electricity while a Nonelectrolyte Cannot? Cinnabar 8. Formation of Hag inside the blast furnace. ICSE Class 10 Chemistry Chapter 7 Metallurgy Revision Notes by Swiflearn are so far the best and most reliable Revision Notes for ICSE Class 10 Chemistry. (ii) The element X, contains one electron in the outermost orbit of its atom, which can be easily donated and one unit of positive charge is gained on its ion. Answer: (i) Caustic alkali dissolves aluminium oxide forming soluble sodium aluminate while impurities remains insoluble and ppt. Answer: (i) (a) (1) The metal X is sodium. (iii) Name two other metals, which can be extracted by electrolytic reduction method. (b) How will you show that sulphur is a non-metal ? (iii) Copper and Tin. Question 1: Write balanced chemical equation: 1. Answer: Iron is quite reactive metal, it easily combines with other metals. (b) Which of these is most likely to be found in free state in nature ? She gave her Class 10 ICSE board exams in 2013 and passed with a 95.33%. Why ? 2ZnS + 3O2 ⟶ 2ZnO (Zinc oxide) + 2SO2 ↑ Zinc oxide so obtained is mixed with carbon and is strongly heated, where it is reduced to metallic zinc and carbon monoxide are formed. Answer: (i) (a) Aluminium metal is extracted from Bauxite ore [Al2O3. Purified ore is roasted in a reverberatory furnace, where it is decomposed to form zinc oxide and carbon dioxide gas is liberated. (ii) Alumina (Al2O3) is the main aluminium yielding compound. (iv) (a) Type metal is hard and expands on cooling and is therefore used for making types. (iii) Iron and aluminium ores both, contain impurities. (2) The metal Y is copper. Using caustic soda solution, how would you distinguish between these two salts ? Fe2O3 12. By which chemical process is the amount of carbon decreased to make steel ? Selina Concise Chemistry Class 10 ICSE Solutions Metallurgy. (ii) Steel is an alloy of iron and carbon containing very small amounts of impurities, that are present in the cast iron. (3) ‘What metallic property is shown by the non-metal graphite ? Galvanized iron is used in making different varieties of tools for industries, scientific apparatus and household fittings. (c) Aluminium is more active than iron and yet there is less corrosion of the aluminium, when both are exposed to air. To register Chemistry Tuitions on Vedantu.com to clear your doubts. We believe you will find Prateek’s notes quite helpful for last minute preparation/revision for your upcoming ICSE 2019 board exams. 'icse solutions for class 10 chemistry a plus topper may 6th, 2018 - icse solutions for class 10 chemistry download formulae handbook for icse class 9 and 10 the periodic properties and their variations chemical bonding acids bases and salts analytical chemistry mole concept and stoichiometry electrolysis metallurgy study of (ii) The element X, has the electronic configuration 2, 8, 8, 1. Change ), You are commenting using your Facebook account. (ii) Mixture of fluorides. (ii) What are the main constituents of steel ? Download Formulae Handbook For ICSE Class 9 and 10. (ii) Sodium metal is Extracted by the electrolysis of fused sodium chloride. Answer: (i) The gas Y, carbon dioxide and the gas Z, is carbon monoxide. Concentration of Ore ii. Answer: (i) The decreasing order of the given metals is as follows : [Most reactive] Na, Ca, Al, Zn, Fe, Pb, and Cu [Least reactive] (ii) (a) Sodium [Na]. (iv) Stainless steel. (b) Iron ore, lime stone, and coke are used in the extraction of iron. Silica is reduced to Si which volatilises at the temperature of reaction. (iv) Metals form basic oxides. (b) By painting and by coating with nickel. Answer: Extraction of aluminium is difficult because : (i) Pure aluminium oxide melts at 2050°C only. Metal Y, has no reaction with water but its hydroxide decomposes, with slight warming, giving a black powder. To get the latest notes directly in your inbox as soon as they are published, subscribe to our email newsletter if you haven’t already. Gypsum 9. 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. 12. (c) Aluminium metal is protected by a thin film of aluminium oxide, which sticks firmly with the metal and prevents further corrosion. Question 15: (i) (a) Give the common name of an ore, from which aluminium is extracted. 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