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

  • question_answer
    In fractional distillation of petroleum, where do the vapours with highest boiling point condense?

    A)                  In the upper-most portion                

    B)                  In the lower-most portion                

    C)                  In the middle portion                

    D)                  Cannot be said

    Correct Answer: B

    Solution :

    In fractional distillation of petroleum, the vapours with the highest boiling point cannot move up in the fractionating column, (as they have low vapour pressure). So, the liquids with high boiling points condense in the lowest (tray) portion of the fractionating tower.                


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