MEDIUMMCQ SINGLENEET ChemistryInorganic ChemistrySolid statePrevious Year Questions

Which of the following does not show electrical conduction in its physical state ? (CBSE AIPMT 2013)

A.Sodium

B.Diamond✓ Correct

C.Graphite

D.Calcium

Explanation

Graphite contains free electrons and, hence, shows electrical conduction in its natural physical state.

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