A reaction takes place in three steps ; the rate constants are k _1, k_2 and k_3.The overall rate constant k = (k_1

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Q 2663180045.     A reaction takes place in three steps ; the rate constants are k _1, k_2 and k_3.The overall rate constant k = (k_1k_3)/k_2` . If energies of activation are 40, 30 and 20 kJ, the overall energy of activation is (assuming 'A' to be constant for all )
A

10

B

15

C

30

D

60

#### HINT

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