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Q.

Which of the following is non-metal?


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a

Iron nail

b

Aluminium wire

c

Copper plate

d

Piece of coal 

answer is D.

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Detailed Solution

A piece of coal is non-metal.
Iron (Fe), aluminium (Al), and copper (Cu) are all metals, but only carbon is a non-metal that may be broken with a hammer since non-metals are not malleable or ductile. Hammering causes coal, a kind of carbon, to break into pieces. Coal is a fossil fuel with a dark colour that may be mined from the ground and used as fuel for various things. As a result, coal is non-metal.
 
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