RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    When the liquid does not wet the sides of a solid, then angle of contact is

    A)  obtuse           

    B)  acute

    C)  \[90{}^\circ \]              

    D)  zero

    Correct Answer: A

    Solution :

     The liquids which do not wet the solid have obtuse angle of constant. For mercury and glass, the angle of contact is\[135{}^\circ \]. The angle of contact for water and silver is\[90{}^\circ \].


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