Q21 / 160 · TS EAMCET 2020 (10 Sep Shift 1) · Chemistry

Which one of the following methods is suitable to generate aromatic compound(s) from linear aliphatic saturated hydrocarbons with at least six carbon atoms?

  • A
    Heating at $773 \mathrm{~K}$
  • Correct answer
    B
    $\mathrm{Mo}_2 \mathrm{O}_3, 773 \mathrm{~K}, 10-20 \mathrm{~atm}$
  • C
    Anhyd. $\mathrm{AlCl}_3$, conc. $\mathrm{HCl}, \Delta$
  • D
    $\mathrm{Cu}, 523 \mathrm{~K}, 100 \mathrm{~atm}$

Solution

Alkane with six or more C-atoms, when heated under pressure in the presence of a catalyst $\mathrm{Mo}_2 \mathrm{O}_3$ at $773 \mathrm{~K}$ at $10-20 \mathrm{~atm}$. First cyclise and then aromatise to give benzene.

Hence, the correct answer is option: 'B'.

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