DUMET Medical DUMET Medical Solved Paper-2008

  • question_answer
    Empirical formula of compound having molar mass 58 is \[{{C}_{2}}{{H}_{5}}\]. Number of structural isomers possible, are

    A)  1                 

    B)  2

    C)  3

    D)  4

    Correct Answer: B

    Solution :

    Empirical formula is \[{{C}_{2}}{{H}_{5}}\]. Empirical mass formula = 29. Molar mass = 58 Molecular formula will be \[{{C}_{4}}{{H}_{10}}\]. The molecular formula is \[{{C}_{4}}{{H}_{10}}\] and the isomers are two (chair isomers) in number. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}},C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}\]


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