J & K CET Engineering J and K - CET Engineering Solved Paper-2007

  • question_answer
    Inversion of cane-sugar in dilute acid is a

    A)  bimolecular reaction

    B)  Pseudo-unimolecular reaction

    C)  unimolecular reaction

    D)  trimolecular reaction

    Correct Answer: B

    Solution :

     \[{{C}_{12}}{{H}_{22}}{{O}_{11}}+\underset{excess}{\mathop{{{H}_{2}}O}}\,\xrightarrow{\text{dil}\text{.acid}}\] \[\underset{\text{glucose}}{\mathop{{{C}_{6}}{{H}_{12}}{{O}_{6}}}}\,+\underset{\text{fructose}}{\mathop{{{C}_{6}}{{C}_{12}}{{O}_{6}}}}\,\] When one of the reactant is present in large excess, the second-order reaction conforms to the   first  order  and   is   known  as pseudo-unimolecular reaction.


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