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JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Rate law and Rate Constant

  • question_answer
    The rates of a certain reaction (dc/dt) at different times are as follows                 Time                    Rate (mole litre?1 sec ?1 )                 0                              \[2.8\times {{10}^{-2}}\]                 10                           \[2.78\times {{10}^{-2}}\]                 20                           \[2.81\times {{10}^{-2}}\]                 30                           \[2.79\times {{10}^{-2}}\]                 The reaction is                                   [NCERT 1978]

    A)                 Zero order         

    B)                 First order

    C)                 Second order    

    D)                 Third order

    Correct Answer: A

    Solution :

                    The concentration of reactant does not change with time for zero order reaction (unit of K suggests zero order) since reactant is in excess.


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