JEE Main · 2022 · 27 Jun 2022 · Shift 1 · General Principles and Processes of Isolation of Metals

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Match List-I with List-II

List-I:
(A) Concentration of gold ore
(B) Leaching of alumina
(C) Froth stabiliser
(D) Blister copper

List-II:
(I) Aniline
(II) NaOH
(III)

SO_{2}

(IV) NaCN

Choose the correct answer from the options given below.

(A)(A) - (IV), (B) - (III), (C) - (II), (D) - (I)
(B)(A) - (IV), (B) - (II), (C) - (I), (D) - (III)✓ Correct
(C)(A) - (III), (B) - (II), (C) - (I), (D) - (IV)
(D)(A) - (II), (B) - (IV), (C) - (III), (D) - (I)

Answer: (B)

Solution

Matching metallurgical processes:

Gold ore is concentrated by cyanidation using NaCN (Mac Arthur-Forrest process)
Leaching of alumina from bauxite is done using NaOH (Bayer's process)
Froth stabiliser in froth floatation process is aniline or cresols
Blister copper has condensed $SO_{2}$ on its surface (from roasting of copper pyrites)

Therefore: (A)-(IV), (B)-(II), (C)-(I), (D)-(III)

JEE Main · 2022 · 27 Jun 2022 · Shift 1 · Single correct option

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JEE Main · 2022 · 27 Jun 2022 · Shift 1 · General Principles and Processes of Isolation of Metals

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