This chapter is currently out of syllabus
1
JEE Main 2022 (Online) 25th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The compound(s) that is (are) removed as slag during the extraction of copper is :

(A) CaO

(B) FeO

(C) Al2O3

(D) ZnO

(E) NiO

Choose the correct answer from the options given below:

A
(C), (D) only
B
(A), (B), (E) only
C
(A), (B) only
D
(B) only
2
JEE Main 2022 (Online) 29th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List I with List II.

List-I
Ore
List-II
Composition
(A) Siderite (I) FeCO$$_3$$
(B) Malachite (II) CuCO$$_3$$ . Cu(OH)$$_2$$
(C) Sphalerite (III) ZnS
(D) Calamine (IV) ZnCO$$_3$$

Choose the correct answer from the options given below :

A
A-I, B-II, C-III, D-IV
B
A-III, B-IV, C-II, D-I
C
A-IV, B-III, C-I, D-II
D
A-I, B-II, C-IV, D-III
3
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?

A
Zinc
B
Gold
C
Silver
D
Copper
4
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

In the metallurgical extraction of copper, following reaction is used :

FeO + SiO2 $$\to$$ FeSiO3

FeO and FeSiO3 respectively are.

A
gangue and flux.
B
flux and slag.
C
slag and flux.
D
gangue and slag.
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