Q.

Wolframite ore is separated from tinstone ore by the process of

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a

Roasting

b

Electromagnetic

c

Smelting

d

Calcination

answer is B.

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Detailed Solution

Wolframite ore [FeWO4] is present in tinstone as impurities and it has same mass per unit volume as that of tinstone. So it is separated by electromagnetic separator because wolframite is magnetic in nature; hence it gets attracted by magnet while tinstone doesn't.
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