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5th Class General Knowledge Our Environment Question Bank Environment and its Conservation

  • question_answer
    When lava cools quickly on the Earth's surface, it forms 'X'. 'X' is a very light rock used as a body scrubber and to polish floors. Identify 'X' in the above given paragraph.

    A)  Gneiss             

    B)  Pumice

    C)       Basalt 

    D)       Shale

    Correct Answer: B

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