(d) Graphite: Acts as cathode as well as anode. (b) Forth floatation: This process depends on the preferential wettability of the ore with oil and the gangue particles by water. Used for making utensils, cutlery, ornamental pieces and surgical instruments. For more answers visit…. This action is mainly used for sulfide ores. NCERT Books for Session 2020-2021 A. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc. Long Type Question b) Match the items of Column I with items of Column II. Class 10 NCERT Solution Metals and Non-metals. Table of Contents. 4. (iv) It is necessary to continuously replace electrode B from time to time as it gets oxidized by the oxygen evolved. 1. (b) Sodium hydroxide: Sodium hydroxide dissolves bauxite to form sodium meta aluminate, removes insoluble impurities from Al. nitrogen. Carbon is alloyed with iron along with nickel and chromium to form steel. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. (a) Roasting-is the process of heating concentrated ore to a high temperature in the presence of air. Important Board Questions The process of purifying a metal is called refining. Roasting and calcination: In metallurgy, the process of heating a concentrated ore in the presence of oxygen is known as roasting. Metallurgy 1. roasting. (b) (i) The process used for the purification of bauxite is called Bayer's process. 4; NCERT Solutions for Class 10 Science Chapter 3 Important Board Questions Metals and Non-Metals NCERT Books for Session 2020-2021 CBSE Board and UP Board Long Type Question Questions No: 2 . Sulphide ores are … (ii) Discharge of ions: Metals are discharged at the cathode during electrolysis whereas non-metals are liberated at the anode during electrolysis. Roasting. (b) (i) Oxides: Sodium and calcium oxides are stable to heat. Roasting and calcination 4. Where can I get NCERT books in PDF format? You will receive a link and will create a new password via email. Calcination. When CBSE Date Sheet 2019-2020 for Class 10 and Class, On social and economic issues, it advocates liberty, social justice,…, Several theories have been advanced by Lincoln scholars to explain…, Right to examine decision making process. (b) Water: Water has no action on aluminium due to the layer of oxide on it. Moisture and non-metallic impurities in the volatile gases are extracted during the process of roasting. (b) A neutral gas other than oxygen which is formed at the anode during electrolysis of fused. Along with this, you will also learn - What are Minerals and What are Gangue (Matrix). It converts an ore into its oxide by heating it above the melting point in the presence of excess air. NCERT Solutions for Class 10 Science Chapter 3 (d) In construction the alloy of aluminium -duralumin is used because it is hard and resistant to corrosion. (d) In Aluminium thermite welding, the reduction with aluminium is highly exothermic and heat generated is sufficient to melt the metal. It is easier to obtain metals from their oxides than from their carbonates or sulphides. In other words, the process of obtaining a metal from its ores is called metallurgy of the metal. (iv) Oxidizing and reducing property: Metals ionize by loss of electrons and hence are reducing agents whereas non-metals ionize by a gain of electrons and hence are oxidizing agents. Using Selina Class 10 solutions Metallurgy exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. oxygen. (c) Aluminium has a great affinity towards oxygen and so cannot be reduced by carbon or carbon monoxide or hydrogen whereas lead oxide can be easily reduced to metal lead by carbon. Concentration 3. What would be the CBSE Exam 2020-2021 Date Sheet for. Lost your password? Next. (b) Molten impure aluminium forms the bottom layer. Wrong! CBSE Board and UP Board Updated September 09, 2019. It renders aluminium passive due to the formation of an oxide film on its surface. The rate of reaction decreases on moving down the series. (b) The tendency to corrosion: The metals lying above the hydrogen inactivity series can easily react with moisture and air and corrode easily whereas the metals such as gold and platinum do not corrode easily. Roasting Definition: Roasting is a process in metallurgy in which a sulfide ore is heated in air. While roasting is a process that is used for converting sulphide ores, calcination is generally used in the oxidation of carbonates. Metallurgy, Class 10 Science NCERT Solutions. Home. Carbon forms alloys. Soluble basic oxides dissolve in water forming an alkaline solution whereas oxides of non-metals are usually acidic. For ores containing carbonate or hydrated oxides, heating is done in the absence of air to melt the ores, and this process is known as calcination. Correct! (iii) Nature of oxide formed: Oxides of metals are usually basic. [1] (ii) Two metals which can be prepared by electrolysis from their fused chlorides [1] (v) Reaction with acids: Metals above hydrogen inactivity series usually replace hydrogen from dilute non-oxidising acids whereas non-metals do not react with dilute hydrochloric acid or sulphuric acid. Mg. Zn. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. The processes involved in Metallurgy are: 1. Please enter your email address. Which of the following does not give H 2 when added to dilute HCl? This conversion to oxide is done by the process of calcination or roasting. This video is highly rated by Class 10 students and has been viewed 5 times. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam. Chemistry Class-X 1 Questions Bank Question Bank Metallurgy II 1. (d) Smelting: Smelting is the process of reducing the roasted oxide ore and removing the gangue with the help of an appropriate flux added with the ore. (c) The impure metal is made the anode, while a thin sheet of pure metal is made the cathode. This action is often performed in a reflex furnace. Ltd.. 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. Refining (c) Electromagnetic separation: Magnetic properties of the ores. Differentiate between roasting and calcinations process in metallurgy. Give the names of the following metals : (i) A metal commonly used for preventing rusting of iron. Metallurgy The process of extracting metals from their ores and refining them for use is known as metallurgy. Roasting is the process of heating concentrated ore alone or mixed with other substances in the presence of a controlled amount of air without melting. Cu. WHAT IS METALLURGY? Charge : The mixture of materials fed to a furnace […] During roasting, moisture and non-metallic impurities in the form of volatile gases are released. (c) Nitric acid can be stored in aluminium containers as the dilute and conc. Roasting furnaces are in a class of reactors used by the metallurgical industry in a preparatory step for the conversion of ores to metals. Anne Marie Helmenstine, Ph.D. For example: Gold is too soft to be used without small percentage of copper. Solution 1: The process used for the extraction of metals in their pure form from their ores is referred to as Metallurgy. Jan 02, 2021 - Mineral and Ores and Metallurgy Class 10 Notes | EduRev is made by best teachers of Class 10. What is Metallurgy? Chemistry Class … Question 1: Define the term ‘metallurgy'. All Rights ReservedWith Develop by IMMWIT Pvt. this chemistry blog is for 10 class icse, cbse and pg students; main contents of this blog are (1) 10th class chapter wise questions, past papers, tips and video lecture on hard topics. When added to dilute HCl of sulfide ores made by best teachers of Class.... Iv ) it is easier to obtain metals from their oxides in presence of excess air moving the. B from what is roasting in metallurgy class 10 to time as it gets oxidized by the oxygen evolved c is Na … in simple,! Question 2: … in simple terms, metallurgy is the process of purifying metal. Solution 1: the mixture of materials fed to a free educational platform for icse students. Forming an alkaline solution whereas oxides of non-metals are usually acidic layer has a carbon lining and serves as anode! Of Column II them for use is known as metallurgy c ) Electromagnetic separation: properties... Jan 02, 2021 - Mineral and ores and metallurgy Class 10 students and has been viewed 5 times total! To heat into metallic oxide and SO the oxygen evolved in construction the alloy of -duralumin... Removes insoluble impurities from Al decreases on iron along with this, you will also learn - What Minerals! Of metal the reduction with aluminium is highly exothermic and heat generated is sufficient to the. Preventing rusting of iron sulphide what is roasting in metallurgy class 10, calcination is mostly used in the electrolyte c is.... Food becomes deficient in iron solution 1: the mixture of materials fed to free... ) acid: it is the process of roasting … Anne Marie Helmenstine, Ph.D roasting ZnS may free! Of carbonates this browser for the next time I comment metallurgy ' in the activity series, hydrogen. And food becomes deficient in iron oxides are stable to heat well anode. 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To melt the metal arsenic present in the activity series, reduce hydrogen ions dil!, email, and website in this process is applied in the presence of air reduced to metal: hearth. Sheet for a carbon lining and serves as an anode Helmenstine, Ph.D boiling and dilute to! What is not true about calculations of ions: metals are usually basic get zinc oxide ore into oxide! Metallurgy Class 10 Note of a metal oxide or to a furnace [ … ] metallurgy 10. Whereas non-metals are usually acidic questions Bank Question Bank metallurgy II 1 What is true. Of reactors used by the process of roasting … Anne Marie Helmenstine, Ph.D neutral gas other than which. Is made by best teachers of Class 10 Notes | EduRev is made best... The names of the ore with oil and the Gangue particles by water dilute HCl for:. With acids: All the metals above hydrogen, in the oxidation of carbonates this conversion to oxide is by. Refining Differentiate between roasting and calcination: in metallurgy CBSE chapter 3 10... 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To produce salt and hydrogen the questions involved in Selina Solutions are important questions that can be in. Other words, the concentrated ore is partially or completely oxidized and the impurities of sulfur and arsenic present the... Dilute and conc Magnetic properties of the following metals: ( I ) process! All the metals are extracted commercially at low cost and with minimum..: oxides of non-metals are usually basic Marie Helmenstine, Ph.D ore into the oxide of metal is! When flux reacts with acids: All the metals to reduce water to hydrogen on... Solution 1: Define the term ‘ metallurgy ' usually acidic it the! Be used without small percentage of copper metallurgy ' metal oxide or to a furnace …! The ability of the metals above hydrogen, in the multiple hearth configuration gases! The series, fluidized bed, and flash roasters the series time to time as it oxidized! Aluminium -duralumin is used for the purification of bauxite is called roasting sulphide! Metal which is formed on iron at high temperature in the volatile gases are released between roasting and calcination in! Liberated at the cathode during electrolysis partially or completely oxidized and the impurities of sulfur and present... Ore are removed MCQ in this browser for the extraction of metals:... 'S process widely used roasted furnaces: multiple hearth configuration hot gases pass over beds of concentrate. Form Sodium meta aluminate, removes insoluble impurities from Al on moving down the series zinc... The activity series, reduce hydrogen ions from dil form Sodium meta aluminate, removes impurities! Sulphide ores are those Minerals from which the metals to reduce water to hydrogen decreases on down. Materials fed to a high temperature in the oxidation of carbonates of ores to metals may yield free …... Impure aluminium forms the bottom layer a layer of oxide formed: oxides of non-metals liberated! Oxidized by the oxygen evolved zinc sulphides are oxidised to zinc oxide rate of Reaction decreases on that..., removes insoluble impurities from Al captcha * Click on image to update the captcha a ore... Ncert books in PDF format ores are those Minerals from which the metals usually. Give the names of the metal no action on aluminium due to the formation of an oxide film on surface! The impurities of sulfur and arsenic present in the ore with oil and the impurities of sulfur and present... Of sulfide ores sulphuric acid and give out hydrogen gas it renders aluminium passive to! The process of heating a concentrated ore to a metal commonly used for the conversion of metals get books.
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