Assertion :- Wolframite impurities are separated from cassiterite by electromagnetic separation. Reason :Cassiterite being magnetic is attracted by the magnet and forms a separate heap.

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Magnetic-separation :- It is based on differences in magnetic properties of the ore components. So statement-I is true.

Non-magnetic Cassiterite $(SnO_{2})$ is separated from magnetic Wolframite $(FeWO_{4} + MnWO_{4})$ . So statement-2 is false.

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