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

  • question_answer
    Which equation is correct for first order reactions [MP PMT 2003]

    A)                 \[{{t}_{1/2}}\propto {{C}^{-1}}\]              

    B)                 \[{{t}_{1/2}}\propto C\]

    C)                 \[{{t}_{1/2}}\propto {{C}^{0}}\]

    D)                 \[{{t}_{1/2}}\propto {{C}^{1/2}}\]

    Correct Answer: C

    Solution :

                    The relation between half ? life period and initial concentration  for a nth order reaction is given by \[{{t}_{1/2}}\propto \frac{1}{{{C}^{n-1}}}\] for first order reaction \[(n=1)\]. \[{{t}_{1/2}}\propto \frac{1}{{{C}^{1-1}}}\] or \[{{t}_{1/2}}\propto {{C}^{0}}\].


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