15. Which is the strongest base?
(A) 1 M hydroxylamine； = 8.0
(B) 1 M aniline； = 9.4
(C) 1 M ethylamine； = 3.4
(D) 1 M ammonia； = 4.7
(E) 1 M hydrazine；= 6.0

pKb=-log Kb pKb越大Kb越...