Toluene contains:

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(D) The chemical formula of toluene is $C_6H_5CH_3$.In the benzene ring $(C_6H_5-)$,there are $6$ $C-C$ bonds ($3$ single and $3$ double) and $5$ $C-H

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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 $(C_6H_5-)$,there are $6$ $C-C$ bonds ($3$ single and $3$ double) and $5$ $C-H$ bonds.In the methyl group $(-CH_3)$,there is $1$ $C-C$ bond and $3$ $C-H$ bonds.Total $\sigma$ bonds = $6$ ($C-C$ in ring) + $5$ ($C-H$ in ring) + $1$ ($C-C$ methyl) + $3$ ($C-H$ methyl) = $15$ $\sigma$ bonds.Total $\pi$ bonds = $3$ $\pi$ bonds (from the benzene ring).Therefore,toluene contains $15\sigma$ and $3\pi$ bonds.

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