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1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The ore that contains the metal in the form of fluoride is :
A
sphalerite
B
magnetite
C
malachite
D
cryolite
2
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The Mond process is used for the
A
Extraction of Zn
B
extraction of Mo
C
Purification of Zr and Ti
D
Purification of Ni
3
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
4
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
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