... Trong s cỏc loi t sau: [-NH-(CH 2)6 -NH-OC-(CH 2)4 -CO-]n (1 ) [-NH-(CH 2)5 -CO-]n (2 ) [C6H7O2(OOC-CH 3)3 ]n (3 ) T thuc loi poliamit l A (1 ), (2 ), (3 ) B (1 ), (3 ) C (2 ), (3 ) D (1 ), (2 ) Cõu 20: Cho s phn ng: ... H2N-CH2-COOH B CH3-CH(NH 2)- COOH C C6H5NH2 D H2N-CH2-CH2-COOH Cõu 32: Cú th dựng Cu(OH)2 phõn bit c cỏc cht nhúm A C3H5(OH)3, C12H22O11 (saccaroz) B CH3COOH, C2H3COOH C C3H5(OH)3, C2H4(OH)2 D C3H7OH, CH3CHO ... polime sau: (- CH2- CH2-)n, (- CH2- CH=CH- CH2-)n, (- NH-CH2-CO-)n Cụng thc ca cỏc monome trựng hp hoc trựng ngng to cỏc polime trờn ln lt l A CH2=CHCl, CH3- CH=CH- CH3, CH3- CH(NH 2)- COOH B CH2=CH2,...