... CTCT c a A : A HO-CH2-CH2-COOH B HO-CH2-CH(CH3)-COOH C HO-CH2-CH2-CH2-COOH D C B C Câu 99: Cho h p ch t h u sau : HO-CH2-CH2-OH (1), OHC-CHO (2), HO-CH2-CHO (3), HOOC-COOH (4), HOOC-CHO (5) Th t ... c u t o c a Propan-1,3-diol là: A: HO-CH2-CH(OH)-CH2OH B: HO-CH2-CH2-CH2-OH C: CH3-CH(OH)-CH2-CH2-OH D: HO-CH2-CH(OH)-CH3 ðáp án B Câu 102: Cho h p ch t thơm: C6H5OH(1), CH3-C6H3(OH)2(2), C6H5CH2OH(3) ... u - L p 11 chuyên Hoá - Trư ng THPT chuyên Lê Quý ðôn HOOC-CH2-CH(CH3)-CH(CH3)-CH2-COOH A Axit 3,4 - ñimetyl hexanoic B Axit 1,2 - ñimetyl hexanoic C Axit 3,4 - ñimetyl butanoic D Axit 1,2 -...