CMC Medical CMC-Medical VELLORE Solved Paper-2012

  • question_answer
    The surface tension of which of the following liquid is maximum?

    A)  \[{{H}_{2}}O\]                 

    B)  \[{{C}_{6}}{{H}_{6}}\]

    C)  \[C{{H}_{3}}OH\]                            

    D)  \[{{C}_{2}}{{H}_{5}}OH\]

    Correct Answer: A

    Solution :

                    Surface tension of \[{{H}_{2}}O\]is maximum due to maximum hydrogen bonding in comparison to \[{{C}_{6}}{{H}_{6}},\]\[C{{H}_{3}}OH,\,\,{{C}_{2}}{{H}_{5}}OH\]. The order of H-bonding is \[{{H}_{2}}O>C{{H}_{3}}OH>{{C}_{2}}{{H}_{2}}OH\] (Benzene does not form H-Bond.)


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