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NEET AIPMT SOLVED PAPER 1999

  • question_answer
                Which of the following does not show electrical conduction?                                                         

    A)              Potassium 

    B)              Graphite

    C)              Diamond      

    D)              Sodium

    Correct Answer: C

    Solution :

                Diamond does not show electrical conductivity due to the absence of free electrons. All carbon atoms are bonded tetra hedrally to four other C atoms. Sodium and potassium are metallic conductors while graphite is a non metallic conductor.


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