The concentration of chromite $(F e O \cdot {C r}_{2} O_{3})$ is done by:

Leaching process

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Magnetic separation

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Froth - flotation

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Calcination

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Solution

The correct option is C Magnetic separation
Magnetic Separation: This method is adopted when either ore or the impurities are magnetic in nature. They are separated from each other by means of magnetic separators. Eg: $C r_{2} O_{3}$ (Non magnetic) in $F e O$ (magnetic).

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