Question

The correct order of dehydration of alcohols is

• A. $1^{°}>2^{°}>3^{°}$
• B. $3^{°}>2^{°}>1^{°}$
• C. $2^{°}>1^{°}>3^{°}$
• D. $1^{°}>3^{°}>2^{°}$

Answer 1

Answer: (B)

Dehydration of alcohols involves the formation of carbocation intermediates. More the stability of carbocation, more will be the ease of alcohol towards dehydration.
$\because$ The order of stability of carbocations is
$3^{\circ }>2^{\circ }>1^{\circ }$
$\therefore$ The order of ease of dehydration of alcohols is
$3^{\circ }>2^{\circ }>1^{\circ }$