VIT Engineering VIT Engineering Solved Paper-2015

  • question_answer
    Which of the following reactions is used to prepare isobutane?

    A) Wurtz reaction of \[{{C}_{2}}{{H}_{5}}Br\]

    B) Hydrolysis of n-butylmagnesium iodide

    C) Reduction of propanol with red phosphorus and HI

    D) Decarboxylation of 3-methylbutanoic acid

    Correct Answer: D

    Solution :

    Decarboxylation of 3-methylbutanoic acid gives isobutene i.e., \[{{n}^{2}}=4\]                            \[\Rightarrow \] On the other hand, Wurtz reaction of \[NaN{{H}_{2}}\] gives -n-butane, hydrolysis of n-butyl magnesium bromide also gives n -butane but reduction of propanol with HI/P gives propane.


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