CMC Medical CMC-Medical VELLORE Solved Paper-2009

  • question_answer
    Which is the strongest acid?

    A)  \[{{C}_{2}}{{H}_{6}}\]                   

    B)  \[{{C}_{6}}{{H}_{6}}\]

    C)  \[CH\equiv CH\]                             

    D)  \[C{{H}_{3}}OH\]

    Correct Answer: D

    Solution :

                    \[C{{H}_{3}}OH\] (methyl alcohol) among the given compounds, has the highest tendency to donate a proton, hence it is the strongest acid. \[\underset{methanol}{\mathop{C{{H}_{3}}OH}}\,\rightleftharpoons \underset{\begin{smallmatrix}  methoxide \\  \,\,\,\,\,\,\,ion \end{smallmatrix}}{\mathop{C{{H}_{3}}{{O}^{-}}}}\,+{{H}^{+}}\]


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