Question

Enol form of acetone contains:

• A. 9 $\sigma$-bond, 1 $\pi$-bond and two lone pairs of electrons
• B. 8 $\sigma$-bond, 2 $\pi$-bond and two lone pairs of electrons
• C. 10 $\sigma$-bond, 1 $\pi$-bond and one lone pair of electrons
• D. 9 $\sigma$-bond, 2 $\pi$-bond and one lone pair of electrons

Answer 1

The correct option is A 9 $\sigma$-bond, 1 $\pi$-bond and two lone pairs of electrons

From the given structure,
It contains 9 $-\sigma$ bonds $[2C-C,5C-H,1C-O,1O-H]$,
1 $\pi$ bond, $C=C$
2 lone pairs of electrons on oxygen.