Exams › JEE Advanced › Chemistry
Which of the following metallurgical methods does NOT involve conversion of the anion present in the ore?
- Roasting of zinc blende
- Magnetic separation of tin stone
- Leaching of argentite
- Calcination of malachite
Correct answer: Magnetic separation of tin stone
Solution
Magnetic separation exploits the difference in magnetic properties of the mineral and gangue to physically separate them. No chemical reaction occurs, so the anion (O²- in SnO2) remains unchanged. All other given methods involve chemical transformation of the anion in the ore.
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