Among ammonia, methylamine, aniline, the most basic in aqueous solution is:
AAmmonia, since the simplest amine is always the strongest base
BMethylamine, since the alkyl group donates electrons to N
CAniline, since the aromatic ring stabilises the protonated form
DAll three are equally basic, since they share the N lone pair
Answer & Solution
Correct answer: B. Methylamine, since the alkyl group donates electrons to N
Methylamine: alkyl group donates electrons, raising basicity. Aniline: lone pair delocalised into ring, lower basicity. Order: $CH_3NH_2 > NH_3 > C_6H_5NH_2$.