JEE Main & Advanced Sample Paper JEE Main - Mock Test - 30

  • question_answer
    ?Softening of lead? means the:

    A) Conversion of PbS into Pb

    B) Removal of tin from common solder

    C) Removal of impurities from Pb

    D) Addition of tin to lead

    Correct Answer: C

    Solution :

    Several impurities present in lead makes it hard.


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