Which type of ores can be concentrated b...

Which type of ores can be concentrated by magnetic separation method?

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Magnetic separation can be used to separate magnetic ores from the non-magnetic gangue. For instance, various ores of iron such as haematite `(Fe_(2)O_(3))`, magnetite `(Fe_(3)O_(4))`, iron pyrites `(FeS_(2))` and siderite `(FeCO_(3))` are magnetic. Hence, these can be separated from non-magnetic impurities like silica, by magnetic separation.

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Which one of the following ores is best concentrated bu froth floatation method /

Malachite

Magnetic

Siderite

Galena

Which one of the following ores is best concentrated by froth-floatation method -

magnetite

siderite

galena

malachite

The ore that can be best concentrated by froth - floatation -