Toluene has

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(D) The chemical formula of toluene is $C_6H_5CH_3$.In the benzene ring,there are $6$ $C-C$ bonds (including $3$ double bonds) and $5$ $C-H$ bonds.In

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$15 \sigma$ and $3 \pi$ bonds

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(D) The chemical formula of toluene is $C_6H_5CH_3$.In the benzene ring,there are $6$ $C-C$ bonds (including $3$ double bonds) and $5$ $C-H$ bonds.In the methyl group $(-CH_3)$,there are $1$ $C-C$ bond and $3$ $C-H$ bonds.Total $\sigma$ bonds = $6$ (ring $C-C$) + $5$ (ring $C-H$) + $1$ ($C-C$ bond to methyl) + $3$ ($C-H$ bonds in methyl) = $15$ $\sigma$ bonds.Total $\pi$ bonds = $3$ (from the $3$ double bonds in the benzene ring) = $3$ $\pi$ bonds.Therefore,toluene has $15$ $\sigma$ and $3$ $\pi$ bonds.

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