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  4. Wolframite ore is separated from tin stone ore by the process of

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Q. Wolframite ore is separated from tin stone ore by the process of

BVP MedicalBVP Medical 2007

Solution:

Wolframite ore $ (FeW{{O}_{4}}) $ is tin stone in form of impurities and same mass per unit as tin stone. Wolframite is magnetic in nature and tin stone is non-magnetic in nature. They are separated by magnetic separation. Wolframite is attracted by magnet and falls just below magnet while tin stone falls away from it. Roasting and calcination are method for conversion of ore into oxide. Smelting is used for iron.