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प्रश्न
Zone refining is based on the principle that ______.
विकल्प
impurities of low boiling metals can be separated by distillation.
impurities are more soluble in molten metal than in solid metal.
different components of a mixture are differently adsorbed on an adosrbent.
vapours of volatile compound can be decomposed in pure metal.
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उत्तर
Zone refining is based on the principle that impurities are more soluble in molten metal than in solid metal.
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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.
What is the principle behind the zone refining of metals?
Explain the principle of the method of electrolytic refining of metals. Give one example.
Explain:
Zone refining
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?
What is meant by the term “chromatography”?
Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth floatation process preferably?
Outline the principles behind the refining of metals by the following methods:
Zone refining method
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
Name the method of refining which is Used to obtain semiconductor of high purity.
In the extraction of chlorine from brine:
(i) ∆GΘ for the overall reaction is negative.
(ii) ∆GΘ for the overall reaction is positive.
(iii) EΘ for overall reaction has negative value.
(iv) EΘ for overall reaction has positive value.
How are metals used as semiconductors refined? What is the principle of the method used?
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.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
