Question

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:

• A. $Ni$: Mond's process, $Cu$: Electrolysis, $Zr$: Van Arkel process, $Ga$: Zone refining
• B. $Ni$: Mond's process, $Cu$: Van Arkel process, $Zr$: Zone refining, $Ga$: Electrolysis
• C. $Ni$: Electrolysis, $Cu$: Zone refining, $Zr$: Van Arkel process, $Ga$: Mond's process
• D. None of the above

Answer 1

The correct option is A $Ni$: Mond's process, $Cu$: Electrolysis, $Zr$: Van Arkel process, $Ga$: Zone refining

Nickel is converted to an unstable volatile intermediate by heating it with $CO$.
This is then decomposed at an elevated temperature to obtain pure $Ni$.
$Zr$ and $Ti$ are refined by the Van Arkel - de Boer process. They are converted
into their iodides which are volatilized in an evacuated vessel.
The iodides are decomposed at temperatures as high as 1400 °C.
Blister $Cu$ is refined electrolytically. Gallium is refined using the zone
refining process to get ultra-pure metals!