JEE Main · 2023 · 13 Apr 2023 · Shift 1 · General Principles and Processes of Isolation of Metals

Which one of the following is most likely a mismatch?

(A)Zinc- Liquation✓ Correct
(B)Titanium - van Arkel method
(C)Nickel - Mond process
(D)Copper - Electrolysis

Answer: (A)

Solution

Zinc is a volatile metal and is purified by distillation, in which the metal is vaporised and recondensed while non-volatile impurities are left behind; liquation is reserved for low-melting metals such as tin and lead. Titanium is purified by the van Arkel method, nickel by the Mond process through volatile nickel tetracarbonyl, and copper by electrolytic refining, so these pairings are correct. The mismatched pairing is zinc with liquation.

JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Single correct option

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