• 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)         $p-n$

$2A+B\xrightarrow{\,}$ 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$({{K}_{2}}{{l}_{1}}{{T}_{1}}+{{K}_{1}}{{l}_{2}}{{T}_{2}})/({{K}_{2}}{{l}_{1}}+{{K}_{1}}{{l}_{2}})$ $({{K}_{1}}{{l}_{2}}{{T}_{1}}+{{K}_{2}}{{l}_{1}}{{T}_{2}})/({{K}_{1}}{{l}_{2}}+{{K}_{2}}{{l}_{1}})$