CH 3 – NH 2 (1); CH 3 – NH – CH 3 (2); (CH 3 )(C 2 H 5 ) 2 N (3); (CH 3 )(C 2 H 5 )NH (4)

Câu 30: Cho các amin:

CH 3 – NH 2 (1); CH 3 – NH – CH 3 (2); (CH 3 )(C 2 H 5 ) 2 N (3); (CH 3 )(C 2 H 5 )NH (4): (CH 3 ) 2 CHNH 2 (5)

Amin nào là amin bậc 2?

A. (1), (2). B. (3), (4). C. (4), (5). D. (2), (4).

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