Electromagnets are used to concentrate _______ ores :

mercury

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copper

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Iron

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sulphur

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Solution

The correct option is C Iron
Iron ores have the electromagnetic property so they are concentrated by this method. An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off.

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Similar questions

__________ is a process used to purify or concentrate liquids.

(a) How does an electromagnet differ from a permanent magnet ?

(b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

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