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Name three metals.which occur in nature ...

Name three metals.which occur in nature miainly as oxide ores. Name one-oxide ore of each-of them.

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Aluminium, iron, manganese. Ore of aluminium - bauxite. .Al_2 O_3, 2H_2 O. Ore of iron - Haematite .Fe_2 O_3, x H_2 O. Ore of manganese - Pyrolusite MnO
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