$1$. Isomerization: $n-\text{hexane}$ on heating with anhydrous $AlCl_3$ and $HCl_{(g)}$ at $573 \ K$ undergoes isomerization to form a mixture of $2-\text{methylpentane}$ and $3-\text{methylpentane}$.
$CH_3(CH_2)_4CH_3$ $\xrightarrow[anhydrous \ AlCl_3, HCl_{(g)}]{573 \ K} CH_3-CH(CH_3)-CH_2-CH_2-CH_3 + CH_3-CH_2-CH(CH_3)-CH_2-CH_3$
$2$. Aromatization: $n-\text{hexane}$ when heated to $773 \ K$ under $10-20 \ atm$ pressure in the presence of $V_2O_5$,$Cr_2O_3$ or $Mo_2O_3$ supported over alumina,gets dehydrogenated and cyclized to benzene.
$CH_3(CH_2)_4CH_3 \xrightarrow[773 \ K, 10-20 \ atm]{Cr_2O_3/V_2O_5/Mo_2O_3} C_6H_6 (\text{Benzene}) + 4H_2$