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

  • question_answer
    The half-life period for a first order reaction is 693 seconds. The rate constants for this reaction would be [MP PET 2002]

    A)                 \[0.1se{{c}^{-1}}\]          

    B)                 \[0.01se{{c}^{-1}}\]

    C)                 \[0.001se{{c}^{-1}}\]      

    D)                 \[0.0001se{{c}^{-1}}\]

    Correct Answer: C

    Solution :

               \[{{t}_{1/2}}=\frac{0.693}{k}\]  Given \[{{t}_{1/2}}=693\,\,\sec \]                                 \[693=\frac{0.693}{k}\], \[k=\frac{693\times {{10}^{-3}}}{693}\];                \[k={{10}^{-3}}=0.001\,\,{{\sec }^{-1}}\].


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