Question

Decreasing order of dehydration of the following alcohols is

• A. $a>d>b>c$
• B. $d > b > c > a$
• C. $b > a > d > c$
• D. $b>d>c>a$

Answer 1

Answer: (D)

$b>d>c>a$

Answer 2

The correct option is (D) : b>d>c>a
The order of dehydration of alcohols depends on the stability of the carbocation intermediate formed during the reaction. The more stable the carbocation intermediate, the easier it is for the alcohol to undergo dehydration. Therefore, we need to analyze the structures of the alcohols to determine the stability of the carbocation intermediate.

a>d>b>c: This order suggests that alcohol a is the most easily dehydrated, followed by alcohol d, then alcohol b, and finally alcohol c. This suggests that alcohol a is tertiary, alcohol d is secondary, alcohol b is primary, and alcohol c is also primary.d>b>c>a: This order suggests that alcohol d is the most easily dehydrated, followed by alcohol b, then alcohol c, and finally alcohol a. This suggests that alcohol d is tertiary, alcohol b is secondary, alcohol c is primary, and alcohol a is also primary.

b>a>d>c: This order suggests that alcohol b is the most easily dehydrated, followed by alcohol a, then alcohol d, and finally alcohol c. This suggests that alcohol b is tertiary, alcohol a is secondary, alcohol d is primary, and alcohol c is also primary.b>d>c>a: This order suggests that alcohol b is the most easily dehydrated, followed by alcohol d, then alcohol c, and finally alcohol a. This suggests that alcohol b is tertiary, alcohol d is secondary, alcohol c is primary, and alcohol a is also primary.

In summary, based on the given orders of dehydration, we can conclude that alcohol b is the most easily dehydrated in all cases as it is tertiary. The order of the remaining alcohols can vary depending on the specific order given.