17. Which one(s) of the following compounds give positive result in Tollens test? I. I. III. a. I b. II, II,IV c. I,II,IV d. I,IV e. I,II,III 18. I. Methanol II. t-butyl alcohol III. Isopropyl alcohol IV. Phenol Decreasing order of reactivity of given alcohols with Lucas reagent a. IV > III > II > I b. I > III > IV > II c. IV > II > III > I d. II > III > I > IV 19. The following tests were applied to hydrocarbon samples and the results are given in table below. According to the table above, which of the following statement is true for compound A,B or C ? a. Compound A would be an alkane. b. Compound A would be either an alkane or alkene. c. Compound B would be a non-terminal alkyne. d. Both compound A and B would be alkene. e. Both compound B and C would be alkene