MHTCET 23 Apr 2025 Shift 2 Paper

Concept:Amines are classified by the number of alkyl/aryl groups attached to the nitrogen atom.Explanation:A secondary amine has two carbon groups directly bonded to nitrogen.A. Phenylmethanamine ($\mathrm{C_6H_5CH_2NH_2}$) is a primary amine.B. N-Methylethanamine ($\mathrm{CH_3NHCH_2CH_3}$) has methyl and ethyl groups attached to nitrogen, so it is a secondary amine.C. N,N-Dimethylethanamine has three alkyl groups on nitrogen, so it is a tertiary amine.D. Prop-2-en-1-amine ($\mathrm{CH_2=CHCH_2NH_2}$) is a primary amine.Answer:N-Methylethanamine (Option B)