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JEE Main & Advanced JEE Main Paper (Held On 12-Jan-2019 Morning)

  • question_answer
    Decomposition of X exhibits a rate constant of\[0.05\,\,\mu g/year\]. How many years are required for the decomposition of \[5\mu g\]of X into\[2.5\mu g\]? [JEE Main Online Paper Held On 12-Jan-2019 Morning]

    A) 25                                

    B) 50   

    C) 20                                

    D)   40

    Correct Answer: B

    Solution :

    According to unit of rate constant it is a zero order reaction, then half life of zero order reaction \[{{t}_{1/2}}=\frac{{{C}_{0}}}{2k}=\frac{5}{2\times 0.05}=50\,years\]


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