Q. 124.5( 2 Votes )

Graphite is a good conductor of electricity due to the presence of __________.
A. lone pair of electrons

B. free valence electrons

C. cations

D. anions

Answer :

Graphite has an exceptional but typical structure which leads to conductance.


In this structure, the carbon atoms are arranged in multiple layers and each C atom is covalently bonded to another 3 adjacent C atoms residing in the same layer.


And the 4th valence electrons which were left out of the C atoms are present among different layers and are therefore free for movement. These free electrons result in graphite in a good conductor.


Layered-structure-of-graphite-Adapted-from-Ref-58.png


The other 3 options, (i) lone pair of electrons (iii) cations and (iv) anions are not possible for neutral carbon atoms present in graphite.

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