JEE Main & Advanced AIEEE Solved Paper-2007

  • question_answer Consider the reaction, \[2A+B\to \] products When concentration of B alone was doubled, the half-life did not change. When the concentration of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is       AIEEE  Solved  Paper-2007

    A)  \[{{M}_{O}}{{c}^{2}}\]                 

    B)         no unit                

    C)         \[({{M}_{O}}-17{{M}_{n}}){{c}^{2}}\]                    

    D)         \[p-n\]

    Correct Answer: A

    Solution :

    \[2A+B\xrightarrow{\,}\] products [B] is doubled, half-life didn't change Half-life is independent of change in concentration of reactant\[{{k}_{1}}\]first order First order w. r. t. B [A] is doubled, rate increased by two times \[{{k}_{2}},\] First order w. r. t. A Hence, net order of reaction\[({{K}_{2}}{{l}_{2}}{{T}_{1}}+{{K}_{1}}{{l}_{1}}{{T}_{2}})/({{K}_{1}}{{l}_{1}}+{{K}_{2}}{{l}_{2}})\] Unit for the rate constant\[({{K}_{2}}{{l}_{1}}{{T}_{1}}+{{K}_{1}}{{l}_{2}}{{T}_{2}})/({{K}_{2}}{{l}_{1}}+{{K}_{1}}{{l}_{2}})\] \[({{K}_{1}}{{l}_{2}}{{T}_{1}}+{{K}_{2}}{{l}_{1}}{{T}_{2}})/({{K}_{1}}{{l}_{2}}+{{K}_{2}}{{l}_{1}})\]


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