Select the correct statement(s).

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The delocalised electrons in the n-orbitals of graphite cause this allotropic form to conduct electricity

Pauling assigns "metallic valencies" equal to their group number to the elements of IA to VlA

Diatomic lithium molecules Li2 are stable towards dissociation

All of the above

answer is D.

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Detailed Solution

In graphite each carbon atom is having one free electron. This free electron delocalises in its frame work making it as good conductor of electricity.For metallic bond formation every metal has to give valency electrons to sea or pool of electrons (Pauling theory) which is equal to it's group numberDi atomic Lithium has bond order 1 exists in gas phase and is stable

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