Consider the nitration of benzene using mixed conc. $H_{2} SO_{4}$ and $HNO_{3}$ . If a large amount of
$KHSO_{4}$ is added to the mixture, the rate of nitration will be [NEET 2016]

Question

Consider the nitration of benzene using mixed conc. H_2 SO_4 and HNO_3. If a large amount of KHSO_4 is added to the mixture, the rate of nitration will be [NEET 2016]

Accepted Answer

Correct answer: A. (a) In the nitration of benzene in the presence of conc. H_2 SO_4 and HNO_3, nitrobenzene is formed. HNO_3+H_2 SO_4 ⇌ NO_2^+ Electroph ile + HSO_4^- Nucleophile+H_2O If large amount of KHSO_4 is added to this mixture, more HSO_4^-ion furnishes and hence the concentration of NO_2^+, i.e. electrophile decreases. As concentration of electrophile decreases, rate of electrophilic aromatic reaction also decreases.

$Consider the nitration of benzene using mixed conc. H_{2} SO_{4} and HNO_{3} . If a large amount of KHSO_{4} is added to the mixture, the rate of nitration will be [NEET 2016]$

Solution

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