1.

Fora reaction taking place in three steps , the rate constants are k_(1) , k_(2) and k_(3) . The overall rate constant k = (k_(1) k_(2))/(k_(3)) . If the energy of activation values for the first , second and third stages are respectively 40 , 50 , and 60 kJ mol^(-1), then the overall energy of activation in kJ mol^(-1) is

Answer»

30
40
60
50

Answer :a


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