2-Methylpropane-1,2-diol, (CH3)2C(OH)-CH2OH, is heated with dilute H2SO4. The product is

JEE Main levelSingle correct optionDifficulty 2 of 3ap081

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

Ionisation of the tertiary hydroxyl gives

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

. Hydrogen migrates from

CH X_{2} OH

to the cationic carbon, forming protonated

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

. Loss of

H X^{+}

gives 2-methylpropanal.