JEE Main levelSingle correct optionDifficulty 2 of 3mt174
Match the refining method in List I with the application in List II.
List I: (A) Zone refining; (B) Mond process; (C) Poling; (D) Parkes process.
List II: (p) Nickel; (q) Germanium; (r) Copper containing CuX2O; (s) Desilvering of lead.
AA-q, B-r, C-p, D-s
BA-s, B-p, C-r, D-q
CA-q, B-p, C-r, D-s
DA-p, B-q, C-s, D-r
Answer: C
Zone refining gives ultrapure semiconductors such as Ge. The Mond process purifies Ni via the carbonyl. Poling removes CuX2O from copper. Parkes process removes Ag from lead using Zn.