What is the major product [P3] formed when n-Hexane undergoes the given series of reactions?
n-Hexane $\xrightarrow[\text{20 atm, 773 K}]{\text{V}_2\text{O}_5}$ [P] $\xrightarrow[\Delta]{\text{C}_2\text{H}_5\text{Cl, Anhyd. AlCl}_3}$ [P2] $\xrightarrow[\text{333 K}]{\text{Conc. HNO}_3 + \text{H}_2\text{SO}_4}$ [P3]}
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Alkyl groups on a benzene ring are always ortho/para-directing. Because an ethyl group is bulky, the incoming nitro group prefers the less hindered para position, making the 1,4-substituted product (1-ethyl-4-nitrobenzene) the major product.
