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NEET Sample Paper NEET Sample Test Paper-93

  • question_answer
    A reaction which is of first order w.r.t. reactant A, has a rate constant \[6\,{{\min }^{-1}}.\] If we start with \[[A]=0.5\,mol\,{{L}^{-1}},\]when would \[[A]\] reach the value of \[0.5\,mol\,{{L}^{-1}}\]

    A) 0.384 min         

    B)        0.15 min

    C) 3 min               

    D) 3.84 min

    Correct Answer: A

    Solution :

    [a] \[t=\frac{2.303}{k}\log \frac{a}{a-x}\] \[=\frac{2.303}{6}\log \frac{0.5}{0.05}=0.384\,\min .\]


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