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(C) Heptane $(C_7H_{16})$ undergoes isomerisation in the presence of $AlCl_3/HCl$ to give branched isomers like $2,4$-dimethylpentane.Aromatisation (d

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Heptane

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(C) Heptane $(C_7H_{16})$ undergoes isomerisation in the presence of $AlCl_3/HCl$ to give branched isomers like $2,4$-dimethylpentane.Aromatisation (dehydrocyclization) of $C_7$ alkanes leads to the formation of toluene $(C_6H_5CH_3)$.Cyclisation of heptane specifically yields methylcyclohexane.Since all these chemical properties are characteristic of the straight-chain alkane heptane, the compound $(X)$ is heptane.

The compound $(X)$ on $(i)$ heating in the presence of anhydrous $AlCl_3$ and $HCl$ gas gives $2,4$-dimethylpentane, $(ii)$ aromatization gives toluene, and $(iii)$ cyclisation gives methylcyclohexane. The correct name of compound $(X)$ is:

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