20 Marks Question 2 a. Provide an explanation for each of the following cases: i. 2-Aminopyridine is monobasic while 3-aminopyridine is dibasic. , N , , Y-aminopyridine -aminopyridine ii. Substituted pyridine A is more basic than pyridine itself (B) while substituted pyridine C is less basic than pyridine itself (B). N , N NHAC A B Imidazole has a pkah of 7.1 while oxazole has a pkah of 0.8. N -N 11 imidazole oxazole iv. In the oxazole shown below, halogen-metal exchange takes places faster at C2 than C5. Br O Br V. Heterocycle A, is more reactive than heterocycle B, in chloride nucleophilic displacement reactions. N CI N CI N A B