Which method is used to obtain highly pure $Si$?

Match the following:
| List-$I$ (Refining Methods) | List-$II$ (Metal to be refined) |
| :--- | :--- |
| $(A)$ Zone refining | $(I)$ Titanium |
| $(B)$ Poling | $(II)$ Tin |
| $(C)$ Liquation | $(III)$ Gallium |
| $(D)$ Vapour phase refining | $(IV)$ Copper |

Silver can be separated from lead by

Which process is used for the refining of iron?

Explain the purification of metals in the vapour phase with an example.

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: