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Chemistry · PYQ NEET UG 2016(1)
हिन्दीConsider the nitration of benzene using mixed conc. \( \mathrm{H}_2\mathrm{SO}_4 \) and \( \mathrm{HNO}_3 \). If a large amount of \( \mathrm{KHSO}_4 \) is added to the mixture, the rate of nitration will be
Correct answer · Option 4
slower
Explanation
Adding \( \mathrm{KHSO}_4 \) introduces \( \mathrm{SO}_4^{2-} \) ions, which shifts the dissociation equilibrium backward due to the common ion effect, decreasing the concentration of \( \mathrm{NO}_2^+ \) electrophile and making the reaction slower.
