A first order reaction is 50% completed in 1.26 10 x s. How much time would it take for 100% completion? (JIPMER 2017) (a) 1.26 10 s x (b) 2.52 10 s x (c) 2.52 10 s x

k for first order reaction can be found out by using the formula. 14 1/2 0.693 0.693 1.26 10 k t x 2.303 log a t k a x Thus, for 100% completion, 14 2.303 1.26 10 100 log 0.693 0 t x x t