The total number of compounds from the list b | vedclass

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(D) Compounds containing at least one benzylic hydrogen atom $(\alpha-H)$ undergo oxidation with hot alkaline $KMnO_4$ to form benzoic acid.Looking at

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$5$

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(D) Compounds containing at least one benzylic hydrogen atom $(\alpha-H)$ undergo oxidation with hot alkaline $KMnO_4$ to form benzoic acid.Looking at the provided structures:$1$. Toluene (methylbenzene) has $3$ $\alpha-H$ atoms.$2$. Ethylbenzene has $2$ $\alpha-H$ atoms.$3$. Isopropylbenzene (cumene) has $1$ $\alpha-H$ atom.$4$. Isobutylbenzene has $1$ $\alpha-H$ atom.$5$. Propylbenzene has $2$ $\alpha-H$ atoms.Compounds like tert-butylbenzene (no $\alpha-H$),$2$-phenylpropan$-2-$ol,and biphenyl do not yield benzoic acid under these conditions.Thus,there are $5$ such compounds.

The total number of compounds from the list below that,when treated with hot $KMnO_4$,yield benzoic acid is:

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