Place the following alcohols in decreasing order of rate of dehydration with concentration H 2 S O 4 . 1 . C H 3 C H 2 C H ( O H ) C H 2 C H 2 C H 3 2 . ( C H 3 ) 2 C ( O H ) C H 2 C H 2 C H 3 3 . ( C

Question

Place the following alcohols in decreasing order of rate of dehydration with concentration $H_{2} S O_{4}$ .
$1 . C H_{3} C H_{2} C H (O H) C H_{2} C H_{2} C H_{3}$
$2 .$ $(C H_{3})_{2} C (O H) C H_{2} C H_{2} C H_{3}$
$3 .$ $(C H_{3})_{2} C (O H) C H (C H_{3})_{2}$
$4 .$ $C H_{3} C H_{2} C H (O H) C H (C H_{3})_{2}$
$5 .$ $C H_{3} C H_{2} C H_{2} C H_{2} C H_{2} C H_{2} O H$

TestHub · Accepted Answer

The alcohols (3) and (2) are both 3 ° , but alcohol (3) gives a more substituted alkene. Alcohol (4) and (1) are both 2 ° , but alcohol (4) can give a more substituted alkene and alcohol (5) is 1 ° . Rate of dehydration of alcohols with concentration H 2 S O 4 follows the order 3 > 2 > 4 > 1 > 5

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