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What is the order of a reaction that is ...

What is the order of a reaction that is 50% complete after 2 h and 75% complete after 4 h?

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It is a first order reaction because for 75% completion of reaction two half-lives are required (as, `t_(1//2) =2` h), which suggests that `t_(1//2)` is independent of initial concentration.
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Knowledge Check

  • The time for half of a first order reaction is l hr. What is the time taken for 87.5% completion of the reaction:

    A
    1 hour
    B
    2 hour
    C
    3 hour
    D
    4 hour

  • The time for half of a first order reaction is l hr. What is the time taken for 87.5% completion of the reaction:

    A
    1 hour
    B
    2 hour
    C
    3 hour
    D
    4 hour

  • 75% of a first order reaction was completed in 32 minutes, 50% of the reaction will be completed in

    A
    24 min
    B
    16 min
    C
    8 min
    D
    22 min

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