JEE Main 2022 · 27 Jun · Shift 1 · Chemistry Q66

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ChemistryList match+4 / -1Question 66 of 90

Match List - I with List - II.

Choose the correct answer from the options given below.

List - I

A
Concentration of gold ore
B
Leaching of alumina
C
Froth stabiliser
D
Blister copper

List - II

I
Aniline
II
NaOH
III
$\mathrm{SO_2}$
IV
NaCN

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

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

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

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

Answer and worked solution

Official answer: B

Match. Gold ore is leached with NaCN (IV); alumina with NaOH (II); aniline stabilises froth (I); blister copper's blisters come from escaping $\mathrm{SO_2}$ (III).

(B)

Topics:Concentration of ores Extraction of specific metals

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JEE Main 2022 · 27 Jun · Shift 1, Chemistry question 66