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  3. NEET

NEET AIPMT SOLVED PAPER 1999

  • question_answer
                Percentage of lead in lead pencil is:                                                                                                            

    A)              zero   

    B)              20             

    C)              80             

    D)              70

    Correct Answer: A

    Solution :

                          In lead pencil graphite and clay is present so the per cent of lead is zero.


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