Đáp án C
CH3CH2OH ⇄ H 2 SO 4 ( n ) , t ° CH2 = CH2 + H2O
CH3-CH(OH)-CH3 ⇄ H 2 SO 4 ( n ) , t ° CH3-CH=CH2 + H2O
CH3-CH2-CH2OH ⇄ H 2 SO 4 ( n ) , t ° CH3-CH=CH2 + H2O
(CH3)2CH-CH2OH ⇄ H 2 SO 4 ( n ) , t ° (CH3)2C=CH2 + H2O
(CH3)C-OH ⇄ H 2 SO 4 ( n ) , t ° (CH3)2C=CH2 + H2O
(CH3)2CH-CH(OH)-CH3 ⇄ H 2 SO 4 ( n ) , t °