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a. Complete the table. Method of preparation & Content Pig ironCast ironWrought ironSteel ...i........ii.......iii.......iv....b. Stainless steel and Nichrome are having same content (Fe, Ni, Cr, C). But nature of both alloys are different Why? c. Bauxite and clay are minerals of aluminum. But bauxite is the only ore of Aluminium. Why?. |
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Answer» a. i. Obtained from Blast Furnace Contains 4% Carbon and other impurities like manganese silicon, phosphorus, etc. ii. Pig iron mixed with scrap iron and coke melted in a special furnace contains 3% carbon. iii. Made by purifying cast Iron. iv. Prepared by varying the amount of carbon from 0.1 to 1.5%. b. Stainless steel and Nichrome are having the same content but the nature of both alloys are different because ratio of constituent elements are different. c. A mineral from which a metal is economically, easily and quickly extracted is called the core of the metal. Among the minerals of aluminum, bauxite possesses these properties. Hence bauxite is the ore of Aluminium. Since clay does not possess these properties it is not an ore of Aluminium. |
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