Medium
Explain chromatographic methods to refine the elements.
Principle: The method is based on the difference in adsorption of different components of a mixture on an adsorbent.
The mixture is placed onto a stationary phase,which may be a solid or a liquid. $A$ pure solvent,a mixture of solvents,or a gas is allowed to move slowly over the stationary phase. Different components of the mixture get separated gradually as the moving phase progresses. There are several chromatographic techniques such as paper chromatography,gas chromatography,thin-layer chromatography,and column chromatography. Column chromatography is very useful for the purification of elements that are available in minute quantities and where the impurities do not differ significantly in chemical properties from the element to be purified.
The mixture is placed onto a stationary phase,which may be a solid or a liquid. $A$ pure solvent,a mixture of solvents,or a gas is allowed to move slowly over the stationary phase. Different components of the mixture get separated gradually as the moving phase progresses. There are several chromatographic techniques such as paper chromatography,gas chromatography,thin-layer chromatography,and column chromatography. Column chromatography is very useful for the purification of elements that are available in minute quantities and where the impurities do not differ significantly in chemical properties from the element to be purified.
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Similar Questions
Match the following List-$I$ (Method) with List-$II$ (Metal refined):
List-$I$ (Method) List-$II$ (Metal refined) $(A)$ Zone refining $(I)$ $Sn$ $(B)$ Liquation $(II)$ $In$ $(C)$ Vapour phase refining $(III)$ $Zn$ $(D)$ Distillation $(IV)$ $Zr$ - $(V)$ $Al$
The correct answer is:
| List-$I$ (Method) | List-$II$ (Metal refined) |
|---|---|
| $(A)$ Zone refining | $(I)$ $Sn$ |
| $(B)$ Liquation | $(II)$ $In$ |
| $(C)$ Vapour phase refining | $(III)$ $Zn$ |
| $(D)$ Distillation | $(IV)$ $Zr$ |
| - | $(V)$ $Al$ |
The correct answer is:
The Van Arkel method for the purification of metals involves converting the metal into a:
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View SolutionThe purification of $Zr$ (Zirconium) is carried out by the $Van$ $Arkel$ method. Which halogen is used in this process?
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View SolutionThe pair of metals refined by "vapour phase refining" is
In electrorefining of copper,some gold is produced as
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