If effective rate constant of disappearance of A is $4.4 \times 1 0^{- 2} sec^{- 1}$ then consider following 1st order reaction, where [C] is equal to [D] at all times after the start of reaction time (in sec) at which concentration of all three species A, C & D are equal is :- $(ln 3 = 1.1, ln 2 = 0.7)$

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t ⇒ 4.4 × 1 0 − 2 ln 3 ​ A l so K 1 ​ [ A ] A 0 ​ − x ⇒ A 0 ​ ​ = K 1 ​ ln [ A 0 ​ − x A 0 ​ ​ ] = K 1 ​ ln [ A 0 ​ − 3 2 A 0 ​ ​ A 0 ​ ​ ] = 25 = K 2 ​ = 2 K ​ = 2.2 × 1 0 − 3 = [ C ] = 2 x ​ = 2 3 x ​ ​

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