Question

Match List - I with List - II :
List - I (a) Mercury (b) Copper (c) Silicon (d) Nickel
List - II (i) Vapour phase refining (ii) Distillation Refining (iii) Electrolytic Refining (iv) Zone Refining Choose the most appropriate answer from the option given below :

• A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
• B. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
• C. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
• D. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

Hint:

{Refining Methods:}
{Distillation:} Use for low boiling metals (Zn, Hg, Cd).
{Liquation:} Use for low melting metals (Sn, Pb).
{Zone Refining:} Use for ultra-high purity semiconductors (Si, Ge, Ga).
{Vapour Phase:} Mond process for Ni; Van Arkel for Zr and Ti.

Answer 1

The Correct Option is A

Step 1: Mercury (a) is a low-boiling metal, so it is refined by Distillation (ii).
Step 2: Copper (b) is refined using Electrolytic Refining (iii).
Step 3: Silicon (c) (and Germanium) requires ultra-high purity for semiconductors, achieved by Zone Refining (iv).
Step 4: Nickel (d) is refined by the Mond process, which is a type of Vapour Phase Refining (i).