RAJASTHAN ­ PET Rajasthan PET Solved Paper-2008

  • question_answer
    1.0 L of 2.0 M acetic acid is added with 1.0 L of 3.0 M ethyl alcohol. The following reaction takes place during this process \[C{{H}_{3}}COOH+{{C}_{2}}{{H}_{5}}OH\]      \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}+{{H}_{2}}O\] If each solution is diluted by adding 1.0 L water, then initial rate of the reaction will reduce

    A)  0.5 times        

    B)  2.0 times

    C)  4.0 times        

    D)  0.25 times

    Correct Answer: D

    Solution :

     \[C{{H}_{3}}COOH+{{C}_{2}}{{H}_{5}}OH\to C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}+{{H}_{2}}O\] This is a second order reaction. Hence, initial rate of the reaction will reduced by (1/2)2 ie, 0.25 times.


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