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Amorphous forms of carbon have a fixed c...

Amorphous forms of carbon have a fixed crystalline shape.

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False. The amorphous forms of carbon are non-crystalline and do not have any fixed shape.
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A substance that does not have a fixed crystalline shape is called _________

Amorphous solids have

Amorphous form of carbon used in making shoepolish.

Crystalline solids have