Permanent magnets are generaly made of a...

Permanent magnets are generaly made of alloys of :

A

`Fe`

B

`Co `

C

`Ni`

D

Any one of these

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The correct Answer is:

D

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the colour of the transition metal or its ion is due to
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A hard and resistant alloy generally used in tip of nib of pen is :
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The general electronic configuration of transition elements is
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