Question

In a first order reaction the concentration of reactant
decreases from 800 mol/dm3 to 50 mol/dm3 is
2x102 sec. The rate constant of reaction in sec - is
(a) 2x104
(b) 3.45 x 10-5
(c) 1.386 x102 (d) 2x10-4​

Answer 1

Sorry I think in the question the time taken is 2x10^-2 then only the c) option 1.386x10^2 will come