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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-16

  • question_answer
    Which one among the following is used in making lead pencils?

    A) Charcoal                       

    B) Graphite

    C) Coke                

    D) Carbon black

    Correct Answer: B

    Solution :

    Graphite is used in making lead pencils. It is a mineral Composed exclusively of element Carbon. Charcoal is a black residue produced by heating of wood in absence of Oxygen. Coke is used as a fuel, it has a high Carbon content, carbon black is produced by the incomplete Combustion of heavy Petroleum products.


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