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  4. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/a23ff1b08d9ae25596d26a5da0f5b112-.png /> Ef= activation energy of forward reaction Eb= activation energy of backward reaction Et= threshold energy In a reaction, A+B arrow C is exothermic to the extent of 30 kJ / mol and the activation energy of the forward reaction is 249 kJ / mol, then the activation energy of reverse reaction (in kJ / mol ) is

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$E_{f}=$ activation energy of forward reaction
$E_{b}=$ activation energy of backward reaction
$E_{t}=$ threshold energy
In a reaction, $A+B \rightarrow C$ is exothermic to the extent of $30\, kJ / mol$ and the activation energy of the forward reaction is $249\, kJ / mol$, then the activation energy of reverse reaction (in $kJ / mol$ ) is

Chemical Kinetics

Solution:

Correct answer is (b) $279$