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InterviewSolution
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Explain the extraction of metal from the ores |
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Answer» \tThe metals at the top of the activity series (K, Na, Ca, Mg and Al) are so reactive that they are never found in nature as free elements.\tThe metals in the middle of the activity series (Zn, Fe, Pb, etc.) are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides or carbonates.\tBelow copper lies gold and silver that are found in Free State. These metals have low reactivity.Ores that are mined out from the earth contains contaminants with large amounts of impurities including soil, sand, etc. These are known as gangue which must be removed from the ore before extraction of the metal. The processes involved in removing the gangue from the ore are based on the alterations between the physical or chemical properties of the gangue and the ore. There are three ore metal are high reactive. Medium reactive and low reactive |
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