question_answer

The correct order of ease of dehydration of following is

A)  \[I>II>III\]      

B)         \[III>II>I\]         

C)         \[I>III>II\]

D)         \[III>I>II\]

Correct Answer: B

Solution :

Compound (III) dehydrate most easily, as it leads to the formation of an aromatic compound Compound (II) dehydrate less easily than (III) but more easily than (I). It is due to the formation of stable conjugated diene in this case. Compound (I) is most difficult to dehydrate.