Consider the following reactions. i. 2502(g) + o2(g) → 250,(g) over a pt(s) catalyst ii. 4hci(g) + o2(g) 2012(g) + 2h2o(g) over a cucl(s) catalyst iii. n2(g) + 3h2(g) + 2nh3(g) over a fe(s) catalyst which of the above reactions is/are heterogeneous catalysis examples? ! a. only (1) b. only (ii) c. only (iii) d. none since all of the reactions (i., ii., and iii.) are homogenous catalysis examples. e. all of the reactions (i., il., and iii.) are heterogeneous catalysis examples