Question

Arrange the following alcohols in order of increasing ease of dehydration
$C{H}_{3}C{H}_{2}OH$ $C_6{H}_{5}C{H}_{2}OH$
I II

$C{l}_{3}CC{H}_{2}OH$ $F_{3}CC{H}_{2}OH$
​ III IV

• A. II < I < IV < III
• B. IV < III < II < I
• C. IV < III < I < II
• D. II < I < III < IV

Answer 1

The correct option is C

IV < III < I < II

Higher the stability of the carbocation , more easily it is formed and more will be the ease of its dehydration. Stability of the carbocations of the corresponding alcohol is

$F_{3}CC{H}_{2}OH<C{l}_{3}CC{H}_{2}OH<H_{3}CC{H}_{2}OH<C_6{H}_{5}C{H}_{2}OH$ (Ease~of~dehydration)