Refining

Q.

Electrometallurgical process is used to extract

1. $\mathrm{Na}$

2. $\mathrm{Ag}$

3. $\mathrm{Pb}$

4. $\mathrm{Fe}$

Q. Four metals and their methods of refinement are given
(i) $Ni,Cu,Zr,Ga$
(ii) Electrolysis, Van Arkel process, zone refining, Mond's process
Choose the right method for each:

1. None of the above
2. $Ni$: Mond's process, $Cu$: Electrolysis, $Zr$: Van Arkel process, $Ga$: Zone refining
3. $Ni$: Mond's process, $Cu$: Van Arkel process, $Zr$: Zone refining, $Ga$: Electrolysis
4. $Ni$: Electrolysis, $Cu$: Zone refining, $Zr$: Van Arkel process, $Ga$: Mond's process