Question
Rate of dehydration of alcohols follows the order :
A.
$${2^ \circ } > {1^ \circ } > C{H_3}OH > {3^ \circ }$$
B.
$${3^ \circ } > {2^ \circ } > {1^ \circ } > C{H_3}OH$$
C.
$${2^ \circ } > {3^ \circ } > {1^ \circ } > C{H_3}OH$$
D.
$$C{H_3}OH > {1^ \circ } > {2^ \circ } > {3^ \circ }$$
Answer :
$${3^ \circ } > {2^ \circ } > {1^ \circ } > C{H_3}OH$$
Solution :
The order of dehydration among three type of alcohols is $${3^ \circ } > {2^ \circ } > {1^ \circ } > C{H_3}OH.$$ This behaviour is related to the relative stabilities of carbocations $$\left( {{3^ \circ } > {2^ \circ } > {1^ \circ }} \right).$$