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Question

n-heptane when heated to a temperature of about 773 K under high pressure in the presence of Cr2O3/Al2O3 catalyst gives -

A
Ethylbenzene
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B
1,2-dimethylbenzene
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C
Benzene
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D
Methylbenzene(Toluene)
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Solution

The correct option is D Methylbenzene(Toluene)
Aromatization:The n-alkanes with 6 or more C atoms, on heating to 773 K at 10-20 atm pressure in the presence of oxides of V/Mo/Cr get dehydrated and cyclised to form benzene and its derivatives.
C7H16n-heptaneCr2O3/Al2O3, 1020 atm−−−−−−−−−−−−−−(773 K)C6H5CH3Methylbenzene(Toluene)

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