SSC General Science & Technology Sample Paper NCERT Sample Paper-2

  • question_answer
    Oil spreads over the surface of water because:

    A)  Oil is more dense than water

    B)  Oil is less dense than water

    C)  Oil has more surface tension than water

    D)  Oil has less surface tension than water

    Correct Answer: D

    Solution :

    [d] When two immiscible liquids come in contact with each other, the liquid with higher density settles at bottom, whereas the one with lower density floats upon it. Since, oil has lower density than water it floats on the surface of water. The intermolecular forces are not very strong and therefore oil spreads over the water surface.

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