Cho các ancol CH3CH2OH CH3-CH(OH)-CH3  CH3-CH2-CH2OH (CH3)2CH-CH2OH (CH3)3C-OH

* Hướng dẫn giải

Đáp án C

CH3CH2OH $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$ CH2 = CH2 + H2O

CH3-CH(OH)-CH3 $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$ CH3-CH=CH2 + H2O

CH3-CH2-CH2OH  $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$CH3-CH=CH2 + H2O

(CH3)2CH-CH2OH $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$ (CH3)2C=CH2 + H2O

(CH3)C-OH $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$(CH3)2C=CH2 + H2O

(CH3)2CH-CH(OH)-CH3 $\stackrel{\mathrm{H}2\mathrm{SO}4, {\mathrm{t}}^{\mathrm{o}}}{\to }$