Sequence the following steps involved generally in the of a metal in pure form from its , the of a metal in pure form from its .
1 The metal obtained from its oxide requires further purification for end use.
2 The shoud be converted to its oxide form.
3 The is beneficial to us if it is hand-picked then metal crushed and ground, and later
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Solution for a Write the principle of vapour phase refining.b Write the of dilute in the .c What is the of collectors
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Describe the of i in the of gold from gold . ii SiO 2 in the of copper from copper matte. iii Iodine in the refining of zirconium. Write chemical equations for the involved reactions. Ans. i Pig iron into steel: Pig iron is converted to cast iron by heating molten pig iron with scrap iron and coke
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Write the of dilute in the . Answer. oxidises to form soluble complex of cyanide while the impurities remain unaffected which are filtered off. 4Ag + 8CN- + 2H 2 O + O 2 → 4 [AgCN 2]- + 4OH-This process is know as leaching. Previous Question Next
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Role of NaCN in the extraction of silver Ag is from which the silver is obtained later by replacement. 4Ag + 8CN - + 2H 2 O + O 2 → 4 [AgCN 2 - ] + 4OH
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· Iron-Haematite Fe 2 O 3, Copper-Cuprite Cu 2 O. 11. What is the dil in the ? When is treated with solution and air is passed, is dissolved and impurities remain insoluble. is later recovered by displacement with Zn. 4Ag + 8CN- + 2H 2 O + O 2 4[AgCN 2]-+ 4OH
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processing, preparation of the for use in various products.. has long been valued for its white metallic lustre, its ability to be readily worked, and its resistance to the corrosive effects of moisture and oxygen.The lustre of the pure metal is due to its electron configuration, which results in its reflecting all electromagnetic radiation of wavelengths longer than 3000
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in the of gold is as follows: is used in leaching of gold. In this process, finely powdered gold is treated with the dilute solution , a current of air is passed. As a result, gold passes into solution forming soluble complex cyanides
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The from synthetic sulfide in the LeachWELLTM–cyanide system was influenced to different extents by the presence of non- sulfide minerals. In general, most of the non- sulfides interfered with via consumption of LeachWELLTM and cyanide. However, galena acted as a promoter and
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20 to 25 giL at pH 11 to the AgCl, and with 250 giL NaCl to the PbC12 • Without a pre-FeC13 leach, with the solution was about 20 pct. Results of the FeC13 leach tests are listed in table 2. Sil ver increased from 61 to
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The involves in cyanide process are: i Ag 2 S + 2 CN- + O 2 → 2 [Ag CN 2]- + SO 2 ii [Ag CN 2]- + Zn → [Zn CN 4] 2- + Ag. Thus, in equation i O 2 act as oxidising agent Oxidise sulphide to SO 2 and in ii Zn act as reducing agent reduce Ag + to Ag
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· selected May 1, 2018 by Vikash Kumar. Best answer. i in the of gold is to do the leaching of gold in the presence of air from which the gold is obtained later by replacement. ii SiO 2 is added to copper matte to convert the leftout FeS, FeO into slag
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In the froth floatation process, the of the depressants is to separate two sulphide ores by selectively preventing one from forming froth. For example, to separate two sulphide ores ZnS and Pbs, is used as a depressant which selectively allows PbS to
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