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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2013

  • question_answer
    If 50% of the reactant is converted into a product in a first order reaction in 25 minutes, how much of it would react in 100 minutes?

    A)  \[93.75%\]     

    B)  \[87.5%\]

    C)  \[75%\]             

    D)  \[100%\]

    Correct Answer: A

    Solution :

    -.Half-life is 25 mins. \[100\xrightarrow{25\min }50\xrightarrow{25\min }25\xrightarrow{25\min }12.5\xrightarrow{25\min }6.25\]\[6.25%\]remaining, i.e., \[93.75%\]reacted.


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