The time for half life ** of a certain reaction A → products is 1 hour. When the initial concentration of the reactant ‘A’, is 2.0 mol L–1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L–1 if it is a zero order reaction ?
(1) 4 h
(2) 0.5 h
(3) 0.25 h
(4) 1 h
