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प्रश्न
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
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उत्तर
Chromatography is the technique used for separation of the components of a mixture that are soluble in the same solvent and are differently adsorbed on an adsorbent. This technique was first used for separation of colours and hence, the name. There are two phases in chromatography - the stationary phase and the mobile phase. The components of the mixture are absorbed differently in the stationary phase, thus leading to their separation. There are many different types of chromatography - paper chromatography, thin-layer chromatography, gas chromatography etc.
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संबंधित प्रश्न
Describe the roles of the following: NaCN in froth floatation process
What criterion is followed for the selection of the stationary phase in chromatography?
Name the method of refining which is Used to obtain semiconductor of high purity.
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.
Which method is used for refining Zr and Ti? Explain with equation.
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: Zirconium can be purificed by Van Arkel method.
Reason: ZrI4 is volatile and decomposes at 1800 K.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
