Question

Consider the following reaction sequence:
Vinylbenzene \(\xrightarrow{KMnO_4 + KOH, \Delta}\) X \(\xrightarrow{NaOH + CaO, \Delta}\) Y
'Y' can also be formed from

• A. Polymerisation of ethylene
• B. Polymerisation of propyne
• C. Aromatisation of n-hexane
• D. Aromatisation of n-heptane

Hint:

Aromatisation converts alkanes to aromatic compounds under catalytic conditions.

Answer 1

The Correct Option is C

Step 1: Reaction steps
Oxidation of vinylbenzene with \(KMnO_4\) and \(KOH\) forms benzoic acid derivative (X).
Subsequent treatment with \(NaOH\) and \(CaO\) produces benzene derivatives (Y).
Step 2: Alternate synthesis
Y can also be formed by aromatisation of n-hexane (a 6-carbon chain hydrocarbon).
Step 3: Conclusion
Answer is aromatisation of n-hexane.