The ore/s that can be concentrated by magnetic separation method is/are : 
1. Haematite
2. Siderite
3. Iron pyrite
4. All of the above.
Subtopic:  Metallurgy of individual elements |
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At which conditions, Mg can reduce Al2O3 and Al can reduce MgO?
(Given : Elligham diagram)



1. Above 1350°C, Mg can reduce Al2O3 and below1350°C, Al can reduce MgO
2. Mg can reduce Al2O3 and Al can reduce MgO above 1350°C
3. Mg can reduce Al2O3 and Al can reduce MgO below 1350°C
4. Below 1350°C, Mg can reduce Al2O3 and above 1350°C, Al can reduce MgO
Subtopic:  Ellingham Diagram |
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