2-Methylpropane-1,2-diol, (CH3)2C(OH)-CH2OH, is warmed with dilute H2SO4 and rearranges. The carbonyl product is

JEE Main levelSingle correct optionDifficulty 2 of 3ap188

2-Methylpropane-1,2-diol, $(CH X_{3}) X_{2} C (OH) - CH X_{2} OH$ , is warmed with dilute $H X_{2} SO X_{4}$ and rearranges. The carbonyl product is

The tertiary OH is lost preferentially to give

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

. A hydride shifts from the

CH X_{2} OH

carbon to the cationic carbon, leaving

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

, which gives

(CH X_{3}) X_{2} CH - CHO

, 2-methylpropanal.