A) is a non-crystalline substance
B) is an allotropic form of diamond
C) has molecules of variable molecular masses like polymers
D) has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds
Correct Answer: D
Solution :
\[C-\]atoms form covalently bonded plates (layers). Layers are bonded weakly together, thats why one layer can slide over other cause lubricacy. It cannot be melted easily as large number of atoms being bonded strongly in the layer form big entity.
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