Metallurgy - 02
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Q.1.    The commonest method of extraction of metals from oxide ores involves : *
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Q.2. The two main metals in bronze are : *
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Q.3. In the froth floatation process for the purification of ores, the ore particles float because : *
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Q.4. Sulphide ore is generally concentrated by : *
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Q.5. The main ore used for the extraction of iron is : *
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Q.6.  The process used to convert impure alumina to pure alumina is : *
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Q.7.  The part of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AIF6) is : *
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Q.8.  The electrolyte used for electroplating an article with silver is : *
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Q.9.  Aluminium powder is used in thermite welding because : *
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Q.10.  The metals zinc and tin are present in the alloy : *
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Q.11. In electrolytic refining of metals the impure metal is made *
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Q.12.  Stainless steel does not contain : *
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Q.13.  This is not an alloy of copper : *
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