The enolic form of acetone contains

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(A) The enolic form of acetone is propen$-2-$ol,which has the structure $CH_2=C(OH)-CH_3$.Counting the bonds: there are $3$ $C-H$ bonds in the methyl

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$9$ sigma bonds,$1$ pi bond and $2$ lone pairs

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(A) The enolic form of acetone is propen$-2-$ol,which has the structure $CH_2=C(OH)-CH_3$.Counting the bonds: there are $3$ $C-H$ bonds in the methyl group,$2$ $C-H$ bonds in the methylene group,$1$ $O-H$ bond,$1$ $C-O$ bond,$1$ $C-C$ bond,and $1$ $C=C$ bond (which consists of $1$ $\sigma$ and $1$ $\pi$ bond).Total $\sigma$ bonds = $3 + 2 + 1 + 1 + 1 + 1 = 9$.Total $\pi$ bonds = $1$.Oxygen atom in the hydroxyl group has $2$ lone pairs.Thus,the structure contains $9$ $\sigma$ bonds,$1$ $\pi$ bond,and $2$ lone pairs.

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