If the rate of deactivation is given by –\(\frac{da}{dt}\) = 0.0064 day^-1, the expression relating activity and time is ___

(a) a = 0.0064t

(b) a = 1-0.0064t

(c) a = t

(d) a = 0.0064-t

The question was posed to me at a job interview.

My question is based upon Mechanisms of Catalyst Deactivation topic in division Suspended Solid Reactors, Catalyst Deactivation, Diffusion and Reaction of Chemical Reaction Engineering

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