Question

The enolic form of acetone contains : (a) 9 σ bonds,1π bonds and 2 lone pairs (b) 8 σ-bonds,2 π-bonds and 2 lone pairs (c) 10 σ-bonds,1 π -bonds and 1 lone pair (d) 9 σ-bonds,2 π-bonds and 1 lone pairs

Answer 1

The enolic form of acetone is as follows,

      H    O-H  H
       I      I       I                     It is clearly seen that it has 9 σ bonds and 1π bond
H---C==C----C---H                 and 2 lone pairs present on oxygen.    
                    I
                   H
:)