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  • Benzene on nitration gives nitrobenzene in presence of <img alt="\mathrm{\mathrm{HNO}_{3} \: and \: \mathrm{H}_{2} \mathrm{SO}_{4}}" src="https://entrancecorner.codecogs.com/gif.latex?%5Cmathrm%7B%5Cmathrm%7BHNO%7D_%7B3%7D%20%5C%3A%20and%20%5C%3A%20%5Cmat

Benzene on nitration gives nitrobenzene in presence of \mathrm{\mathrm{HNO}_{3} \: and \: \mathrm{H}_{2} \mathrm{SO}_{4}} mixture, where :
Option: 1 both \mathrm{H}_{2} \mathrm{SO}_{4} and \mathrm{HNO}_{3} act as bases
Option: 2 \mathrm{HNO_3} acts as an acid and \mathrm{H_2SO_4} acts as a base
Option: 3 both \mathrm{H_2SO_4} and \mathrm{HNO_3} act as acids
Option: 4 \mathrm{HNO_3} acts as a base and \mathrm{H_2SO_4} acts as an acid

Answers (1)

best_answer

During nitration, a mixture of conc. \mathrm{HNO}_{3} and \mathrm{conc} \cdot \mathrm{H}_{2} \mathrm{SO}_{4} is taken as the nitrating mixture which generates the electrophile \mathrm{NO}_{2}{ }^{+}.

Here, \mathrm{HNO}_{3} acts as a base and is protonated to generate the leaving group \mathrm{H}_{2} \mathrm{O}.

\mathrm{H}_{2} \mathrm{SO_4} acts as an acid.

Hence, the correct answer is option (4)

Posted by

sudhir.kumar

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