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प्रश्न
Explain the following:
Vapour phase refining method is used for the purification of Ti.
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उत्तर
In the process of vapour refining an impure metal is treated with a suitable reagent to form volatile compound which is decomposed at high temperature to get pure metal. Here, Ti can form volatile compound (I1I4) with the iodine and the compound is easily decomposable to give extra pure Ti. So, the recovery is easy.
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संबंधित प्रश्न
Name the method used for the refining of zirconium.
Name the method of refining of metals such as Germanium.
Explain column chromatography.
Outline the principles of refining of metals by the following method:
Vapour phase refining
Describe ‘froth floatation process’ for concentration of sulphide ore.
Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth floatation process preferably?
Write the chemical equations involved in van Arkel method for refining zirconium metal.
Indicate the principle behind the method used for the refining of Nickel.
Write the principle behind the following methods of refining:
Vapour-phase refining
Name the method of refining which is Used to obtain low boiling metal.
In which of the following method of purification, metal is converted to its volatile compound which is decomposed to give pure metal?
(i) Heating with stream of carbon monoxide.
(ii) Heating with iodine.
(iii) Liquation.
(iv) Distillation.
Give two requirements for vapour phase refining.
Assertion: Nickel can be purified by Mond process.
Reason: \[\ce{Ni(CO)4}\] is a volatile compound which decomposes at 460 K to give pure Ni.
Assertion: Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.
Reason: Copper is extracted by hydrometallurgy.
Electrolytic reduction method is used for the extraction of ______.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
