A zero-order reaction has a rate constant of 1.0 × 10⁻³ mol L⁻¹ min⁻¹. How long will it take for 80% of a 0.2 mol L⁻¹ re
t = (0.2 − 0.04)/(1.0×10⁻³) = 160 min.
Ref: NCERT Class 12 Chemistry > Chapter 3: Chemical Kinetics > Topic: Integrated Rate Equations - Zero Order Reactions