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For a first order reaction, calculate th...

For a first order reaction, calculate the ratio between the time taken to complete `3//4th` of the reaction and time to complete half of the reaction.

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The correct Answer is:
2
`t_(1//2) = 0.69/k, t_(3//14) = t_(75%)`
`t_(3//4) = 2.303/k log a/(a-(3a)/4)`
`=2.303/k log 4 = 2.303/k xx 2 xx 0.3010 = (0.69 xx 2)/k`
`t_(3//4) = 2t_(1//2)`
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