1.

Tautomerism is not exhibited by

Answer»




Solution : ESSENTIAL condition for TAUTOMERISM in the presence of an `alpha`-HYDROGEN on a saturated carbon attached to C = O , NO, `NO_(2)` etc. or should have a H-atom PRESENT on a heteroatom (O, N, S etc. ) attachedto a double bond. Thus , option (a) does not have a `alpha`-hydrogen on a saturated carbon and hence does not exhibit tautomerism.


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