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General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements2 Marks
Question
Which of the ores mentioned in Table can be concentrated by magnetic separation method?
Metal Ores Components
Aluminium Bauxite $AlO_x(OH)3-2x$
$[$where $0 < x < 1]$
Iron
Kaolinite $(a$ form of clay$)$
Haematite
Magnetite
Siderite
Iron pyrites
$[Al_2(OH)_4Si_2O_5]$
$Fe_2O_3$
$Fe_3O_4$
$FeCO_3$
$FeS_2$
Copper
Copper pyrites
Malachite
Cuprite
Copper glance
$CuFeS_2$
$CuCO_3.Cu(OH)_2$
$Cu_2O$
$Cu_2S$
Zinc
Zinc blende or Sphalerite
Calamine
Zincite
$ZnS$
$ZnCO_3$
$ZnO$
✓

Answer

If the ore or the gangue can be attracted by the magnetic field, then the ore can be concentrated by the process of magnetic separation. Among the ores mentioned in table $6.1,$ the ores of iron such as haematite $(Fe_2O_3),$ magnetite $(Fe_3O_4),$ siderite $(FeCO_3),$ and iron pyrites $(FeS_2)$ can be separated by the process of magnetic separation.

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