Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Compounds of Carbon and Silicon Single Correct MCQ
Published on: August 12, 2026

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite :

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.

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The correct answer is:
D

Graphite has a two-dimensional sheet like structure and each carbon atom makes a use of sp 2 hybridisation. The above layer structure of graphite is less compact than that of diamond. Further, since the bonding between the layers involving only van der Waal’s forces is weak, these layers can slide over each other. This gives softness, greasiness and lubricating character to graphite.

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