The exponential variation of f with t (h) is — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

Integrating df/(1-f) = K dt gives -ln(1-f) = Kt. From the graph, at t=200, ln(1-f) = -3. So, -K(200) = -3 => K = 3/200. Thus, -ln(1-f) = (3/200)t, which means 1-f = e^(-3t/200) and f = 1 - e^(-3t/200). Therefore, correct answer is A.