1. The half-life of a chemical reaction MS does not change as time progresses. Which of the following statements are correct ? i) the reaction is first order in M ii) the reaction is not first order in M iii) the half-life depends on the initial concentration of M iv) the half -life of the reaction is independent of the initial concentration a. i and ii b. ii and iii c. ii and iv d. i and iv e. i and