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1
JEE Main 2022 (Online) 27th July Evening Shift
Numerical
+4
-1
Out of Syllabus
Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores if iron is _____________.
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2
JEE Main 2022 (Online) 24th June Evening Shift
Numerical
+4
-1
Out of Syllabus
(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?
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3
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
Out of Syllabus
In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud is ______________
Pb, Sb, Se, Te, Ru, Ag, Au and Pt
Pb, Sb, Se, Te, Ru, Ag, Au and Pt
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