If X is a non-metal. It will not conduct electricity unless it is carbon in the form of :

Graphite

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Diamond

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Fullerene

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None of these

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Solution

The correct option is D Graphite
Only graphite conducts electricity due to one free valency as in graphite each carbon form 3 bonds only and one electron is free to move across the layers.

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If X is a non-metal. It will not conduct electricity unless it is carbon in the form of :

The correct option is D GraphiteOnly graphite conducts electricity due to one free valency as in graphite each carbon form 3 bonds only and one electron is free to move across the layers.

The correct option is D Graphite
Only graphite conducts electricity due to one free valency as in graphite each carbon form 3 bonds only and one electron is free to move across the layers.