BHU PMT BHU PMT (Screening) Solved Paper-2011

  • question_answer
    The alkane which has only primary hydrogen atom is

    A)  pentane

    B)  iso-pentane

    C)  neo-pentane

    D)  2,2-dimethyl butane

    Correct Answer: C

    Solution :

                     The structure of neo-pentane shows that all the H-atoms are attached to primary C-atoms hence primary hydrogens. \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\]


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