Which one of the following materials is NOT used for making magnets?

Aluminum

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Lithium

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Cobalt

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Samarium

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Solution

The correct option is B Lithium
Magnets are made using ‘AlNiCo’ which is an alloy of aluminium, nickel, cobalt and iron. Substances like neodymium and samarium are also used for making magnets.
Lithium isn't used for making magnets because it isn't a magnetic material nor is it an economical choice when cheaper alternatives are there.

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