For which of the following reactions \( \mathrm{k}_{310} / \mathrm{k}_{300} \) would be maximum?...

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For which of the following reactions \( \mathrm{k}_{310} / \mathrm{k}_{300} \) would be maximum?
(1) \( \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} ; \mathrm{E}_{\mathrm{a}}=50 \mathrm{~kJ} \)
(2) \( \mathrm{X}+\mathrm{Y} \rightarrow \mathrm{Z} ; \mathrm{E}_{\mathrm{a}}=40 \mathrm{~kJ} \)
(3) \( \mathrm{P}+\mathrm{Q} \rightarrow \mathrm{R} ; \mathrm{E}_{\mathrm{a}}=60 \mathrm{~kJ} \)
(4) \( \mathrm{E}+\mathrm{F} \rightarrow \mathrm{G} ; \mathrm{E}_{\mathrm{a}}=100 \mathrm{~kJ} \)
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