1.

How many tautomeric forms of molecular formula C_(6)H_(5)OH are possible ?

Answer»

TWO
Three
Four
Just one

Solution :
Phenols are much more stable than enols.Both phenols and enols can EB regarded as tautomers of a keto structure.
The large resonance energy of usually causes the keto tautomer to be much more stable than the enol.

However , the keto FORM of phenol can be attained only with the LOSS of the stable aromatic RING making it very much less stable than phenol.


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