3-Methylbutan-2-ol is heated with conc. H2SO4. The major alkene formed is

JEE Main levelSingle correct optionDifficulty 2 of 3o4115

3-Methylbutan-2-ol is heated with conc. $H X_{2} SO X_{4}$ . The major alkene formed is

Protonation and loss of

H X_{2} O

give the secondary cation

CH X_{3} - CH X^{+} - CH (CH X_{3}) X_{2}

. A 1,2-hydride shift gives the tertiary cation

(CH X_{3}) X_{2} C X^{+} - CH X_{2} CH X_{3}

. Loss of a beta-H by the Saytzeff rule gives the trisubstituted alkene 2-methylbut-2-ene.