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Q.
Dehydration of the following in increasing order is
Alcohols Phenols and Ethers
Solution:
Dehydration of $IV$ is most facile since, it gives an aromatic compound. Dehydration of $III$ gives a conjugated diene which is stabilised by resonance.
Dehydration of $II$ gives only cyclohexene which is not stabilised by resonance.
In contrast, phenol $(I)$ does not undergo dehydration.
Thus, the ease of dehydration is :
$IV > III > II > I$.
