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    Question

    On a clean glass plate, a drop of water spreads to form

    a thin layer whereas a drop of mercury remains almost spherical because:
    A Mercury is a metal Correct Answer Incorrect Answer
    B Density of mercury is greater than that of water Correct Answer Incorrect Answer
    C Cohesion of mercury is greater than its adhesion with glass Correct Answer Incorrect Answer
    D Cohesion of water is greater than its adhesion with glass Correct Answer Incorrect Answer

    Solution

    The cohesion (attraction between molecules) of mercury is greater than its adhesion (attraction to glass), causing it to form a spherical shape.

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