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1
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
With respect to an ore, Ellingham diagram helps to predict the feasibility of its.
A
Electrolysis
B
Thermal reducation
C
Vapour phase refining
D
Zone refining
2
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The pair that does NOT require calcination is -
A
Fe2O3 and CaCO3⋅MgCO3
B
ZnCO3 and CaO
C
ZnO and Fe2O3⋅xH2O
D
ZnO and MgO
3
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of -
A
Copper
B
Platinum
C
Carbon
D
Pure aluminium
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match the ores (column A) with the metals (column B) :

(Column A) ores (Column B) Metals
(I) Siderite (a) Zinc
(II) Kaolinite (b) Copper
(III) Malachite (c) Iron
(IV) Calamine (d) Aluminium
A
(I)-(c); (II)-(d); (III)-(b); (IV)-(a)
B
(I)-(a); (II)-(b); (III)-(c); (IV)-(d)
C
(I)-(b); (II)-(c); (III)-(d); (IV)-(a)
D
(I)-(c); (II)-(d); (III)-(a); (IV)-(b)
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