| I. Heating with stream of CO |
| II. Heating with \[{{I}_{2}}\] |
| III. Liquation |
| IV. Distillation |
A) I, II
B) I, III
C) II, III, IV
D) Only IV
Correct Answer: A
Solution :
(I) \[\underset{\operatorname{Impure}}{\mathop{Ni}}\,+4CO\xrightarrow{330-350\,K}Ni\,{{(CO)}_{4}}\]\[\xrightarrow{450-470\,K}\underset{\text{Pure}}{\mathop{Ni}}\,+4CO\,(Mond\,process)\] (II) \[\underset{\operatorname{Impure}}{\mathop{Zr}}\,+2{{I}_{2}}\xrightarrow{870\,K}Zr{{I}_{4}}\]\[\xrightarrow[Tungesten\,\,filament]{2075\,K}\underset{\text{Pure}}{\mathop{Zr}}\,+2{{I}_{2}}(Van\,Arkel\,process)\]
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