The zone refining of metal is based on the pr | vedclass

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(D) Zone refining is based on the principle that the impurities are more soluble in the molten state of the metal than in the solid state. $A$ circula

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Greater solubility of the impurity in the molten state than in the solid

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(D) Zone refining is based on the principle that the impurities are more soluble in the molten state of the metal than in the solid state. $A$ circular mobile heater is fixed at one end of a rod of the impure metal. The molten zone moves along with the heater as it is moved forward. As the heater moves forward,the pure metal crystallises out of the melt,and the impurities pass into the adjacent molten zone,eventually reaching the end of the rod.

List-$I$ (Process)	List-$II$ (Metal)
$A$. Hall-Heroult process	$I$. $Ti$
$B$. Mond process	$II$. $In$
$C$. van-Arkel process	$III$. $Al$
$D$. Zone refining process	$IV$. $Ni$

The zone refining of metal is based on the principle of

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Write two basic requirements for refining of a metal by Mond's process and by Van Arkel Method.

Explain vapour phase refining.

The metal for which its property of formation of a volatile complex is taken into account for its extraction is:

Match the following:
List-$I$ (Process) List-$II$ (Metal)
$A$. Hall-Heroult process $I$. $Ti$
$B$. Mond process $II$. $In$
$C$. van-Arkel process $III$. $Al$
$D$. Zone refining process $IV$. $Ni$

The correct answer is:

Copper sulphate is prepared by blowing a current of air through copper scrap and dilute $H_2SO_4$. Dilute $HNO_3$ is also added:

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