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  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2008

  • question_answer
    For a reaction, the rate constant is \[0.693\times {{10}^{-1}}mi{{n}^{-1}}\]and initial concentration is 0.2 mol/L. Half-life period will be

    A)  400 s            

    B)  600 s

    C)  800 s 

    D)  100 s

    Correct Answer: B

    Solution :

     Velocity constant\[=0.693\times {{10}^{-1}}mi{{n}^{-1}}\] \[=\frac{0.693\times {{10}^{-1}}}{60}{{s}^{-1}}\] Initial concentration = 0.2 mol/L This is first order reaction. It does not depend on initial concentration. Half-life\[=\frac{0.693\times 60}{0.693\times {{10}^{-1}}}\] \[=600s\]


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