\( 75 \% \) of a first order reaction occurs in \( 30 \mathrm{~min} \) at \( 27^{\circ} \mathrm{...

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\( 75 \% \) of a first order reaction occurs in \( 30 \mathrm{~min} \) at \( 27^{\circ} \mathrm{C} .87 .5 \% \) of the same reaction occurs in \( 30 \mathrm{~min} \) at \( 57^{\circ} \mathrm{C} \). The activation energy of reaction is \( [\ln 2=\mathbf{0 . 7}, \ln 3=1.1] \)
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