Zone refining is based on the principle that (i) impurities of low ...

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Zone refining is based on the principle that
(i) impurities of low boiling metals can be separated by distillation.
\( \mathrm{P} \)
(ii) impurities are more soluble in molten metal than in solid metal.
W
(iii) different components of a mixture are differently adsorbed on an adosrbent.
(iv) vapours of volatile compound can be decomposed in pure metal.
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