Câu 1:
Dãy A gồm các chất: $CH_3OH$ (1), $C_2H_5OH$ (2), $C_3H_7OH$ (3), $C_3H_5(OH)_3$ (4), $C_6H_5OH$ (5), $mHO-C_6H_4-CH_2-OH$ (6), $C_6H_5-CH_3$ (7), $C_2H_4$ (8), $CH_2=CH-CH_3$ (9), $C_6H_5CH=CH_2$ (10), CH\equivCH (11), HC\equiv C-CH_3 (12), $CH_2=CH-CH_2-OH$ (13), $C_6H_4(CH_3)_2$ (14)...