You are an alchemist who is trying to remove hard lead impurity from Crude silver. You can only use thermal refining by using a blast of air. What would you use?

Van Arkel-de Boer Refining

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Mond’s process

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Cupellation

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Linz-Donawitz process

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Solution

The correct option is C
Cupellation

Options a and b are both part of vapour phase refining while option d is applicable for steel making. Cupellation is carried out on a boat shaped container in which the surface of the molten impure metal is treated with a blast of hot air. The impurities are oxidized to volatile oxides and they escape with the blast.

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Similar questions

Q. What is meant by refining of a metal? Name the most widely used methods of refining impure metals produced by various reduction processes. Describe with the help of a labelled diagram how this method may be used for refining of copper.

You are an alchemist who is trying to remove hard lead impurity from Crude silver. You can only use thermal refining by using a blast of air. What would you use?

Q. Match the column I with column II and mark the appropriate choice.

	Column I		Column II
(A)	Van Arkel	(i)	$N i$
(B)	Zone refining	(ii)	$T i$
(C)	Mond process	(iii)	$A g$
(D)	Cupellation	(iv)	$G e$

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

Q. Give both chemical equation of 'Mond process' used in nickel refining:

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Standard XII Chemistry

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