Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a nonmetal? (a) Iron nail (b) Aluminium wire (c) Copperplate (d) Piece of coal

(d) Piece of coal

In the given options iron, aluminium and copper, all are metals, but only carbon is a non-metal which is breakable with a hammer as non-metals are not malleable or ductile. Since coal is a form of carbon, it is broken into pieces when hammered. Coal is a black coloured fossil fuel, which is extracted from the ground and is used as a fuel for different purposes.

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