Explain the use of the following:
a) NaCN in Froth Floatation Method.
b) Carbon monoxide in Mond process.
c) Coke in the extraction of Zinc from Zinc Oxide
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1.n froth floatation process,depressants helps to separate two sulphide ores by selective prevention of froth formation by one ore and allowing the other to come into froth. For example, in order to separate two sulphide ores (ZnS and Pbs), NaCN is used as a depressant.
2.The Mond process, sometimes known as the carbonyl process, is a technique created by Ludwig Mond in 1890, to extract and purify nickel. ... This processconverts nickel oxides into pure nickel. This process involves the fact thatcarbon monoxide combines with nickel readily and reversibly to give nickel carbonyl.
3.The concentrated ore is then roasted in the presence of excess of air at about 1200 K. Zinc sulphide plus oxygen giveszinc oxide plus sulphur dioxide. Zinc oxide is mixed with powdered coke and heated to 1673 K in a fire clay retort, in which zinc oxide is reduced to zincmetal.
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2.The Mond process, sometimes known as the carbonyl process, is a technique created by Ludwig Mond in 1890, to extract and purify nickel. ... This processconverts nickel oxides into pure nickel. This process involves the fact thatcarbon monoxide combines with nickel readily and reversibly to give nickel carbonyl.
3.The concentrated ore is then roasted in the presence of excess of air at about 1200 K. Zinc sulphide plus oxygen giveszinc oxide plus sulphur dioxide. Zinc oxide is mixed with powdered coke and heated to 1673 K in a fire clay retort, in which zinc oxide is reduced to zincmetal.
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