A first order reaction which is 30% complete in 30 minutes has a half - life period of

  1. A

    24.2 min

  2. B

    58.2 min

  3. C

    102.2 min

  4. D

    120.2 min

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    Solution:

    k=2.303tlogaax

    0.693T=2.303tlog10010030

    T(half life)=58.2 min

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