JEE Main 2026 · 2 Apr · Shift 2 · Chemistry Q64

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ChemistrySingle correct+4 / -1Question 64 of 75

The compound (X) on
(i) on heating in the presence of anhydrous $\ce{AlCl3}$ and HCl gas gives 2,4-dimethyl pentane
(ii) aromatization gives toulene and
(iii) cyclisation gives methyl cyclohexane
The correct name of compound (X) is :

Hept-2-ene

Hept-1,3,5-triene

Heptane

Hept-2,4,6-triene

Answer and worked solution

Official answer: C

Clues point to n-heptane:

$\ce{AlCl3}$ /HCl isomerises it to the branched isomer 2,4-dimethylpentane ( $\ce{C7H16}$ ).
Aromatisation (dehydrocyclisation) gives toluene.
Cyclisation gives methylcyclohexane.

Heptane.

(C)

Topics:Alkanes Aromatic hydrocarbons and electrophilic substitution

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JEE Main 2026 · 2 Apr · Shift 2, Chemistry question 64