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8th Class Science Coal and Petroleum Question Bank Coal and Petroleum

  • question_answer
    Blackening of base of utensils while cooking food is due to:

    A) Black colour discharged from the utensils.

    B) Black colour of the utensils.

    C) Improper cooking.

    D) Sacking of soot particles from incomplete combustion.

    E) None of these

    Correct Answer: D

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