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A colliison between reactant molecules must occur with a certain minimum energy before it is effective in yielding Product molecules. This minimum energy is called activation energy `E_(a)` Large the value of activation energy, smaller the value of rate constant `k`. Larger is the value of activation energy, greater is the effect of temperature rise on rate constant `k`. `E_(f) =` Activation energy of forward reaction `E_(b) =` Activation energy of backward reaction `Delta H = E_(f) - E_(b)` `E_(f) =` threshold energy The activation eneries for forward and backward reactions in a chemical reaction are `30.5` and `45.4 kJ mol^(-1)` respectively. The reaction isA. exothermicB. endothermicC. neithter exothermic nor endothermicD. idenpendent of temperature

Answer» Correct Answer - A


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