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(b) Name five methods of preventing rusting of iron. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh What is an alloy? How is an alloy made? (b) What elements are present in steel? How are the properties of steel different from those of pure iron? 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh What is meant by ‘rusting of iron’? With the help of labelled diagrams, describe an activity to find out the conditions under which iron rusts. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh What is corrosion? (b) Name any two metals which do not corrode easily. (c) What is the corrosion of iron known as? 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Define the terms (i) mineral (ii) ore, and (iii) gangue. (b) What is meant by the ‘concentration of ore’? 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh What is meant by refining of a metal? Name the most widely used method for the refining of impure metals obtained by various reduction processes. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Name the method by which aluminium metal is extracted. (b) Give the name and chemical formula of one ore of copper. (c) How is zinc extracted from its carbonate ore (calamine)? Explain with equations. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Which one of the methods given in column I is applied for the extraction of each of the metals given in column II : Column I - Column II Electrolytic reduction → Aluminium 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Why is an iron grill painted frequently? (b) Explain why, though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh (a) Why does aluminium not corrode right through? (b) What is meant by ‘anodising’? Why is it done? 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Give reason why copper is used to make hot water tanks but steel (an alloy of iron) is not. (b) Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh What is a thermite reaction? Explain with the help of an equation. State one use of this reaction. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Bronze is an alloy of copper and……………….. (b) The non-metal present in steel is………………… (c) The alloy in which one of the metals is mercury is called an 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh The corrosion of iron is called………………… (b) …………….and………………. are necessary for the rusting of iron. (c) The process of depositing a thin layer of zinc on iron articles is called 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Name one metal each which is extracted by : (a) reduction with carbon. (b) electrolytic reduction. (c) reduction with aluminium. (d) reduction with heat alone. 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Why are the metals like Na, K, Ca and Mg never found in their free state in nature? 3 years ago Jaiyush19 class 10 metals non metals lakhmir singh Page 2 / 5 Prev 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
