JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Sample Paper Topic Test - Chemical Kinetics

  • question_answer
    A decomposes as
    The rate of disappearance of B, taking 4M concentration of A is equal to

    A) \[1.6\times {{10}^{-3}}M{{s}^{-1}}\] 

    B) \[6.4\times {{10}^{-3}}M{{s}^{-1}}\]

    C) \[3.2\times {{10}^{-3}}M{{s}^{-1}}\]

    D) insufficient to calculate

    Correct Answer: C

    Solution :

    \[\frac{1}{2}\frac{d{{C}_{B}}}{dt}={{K}_{1}}{{C}_{A}}\]     \[\frac{d{{C}_{B}}}{2dt}=2{{K}_{1}}{{C}_{A}}\] \[=2\times 4\times {{10}^{-4}}\times 4=32\times {{10}^{-4}}\] \[=3.2\times {{10}^{-3}}\text{M}\,{{\text{s}}^{-1}}\] (logical)

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