MCQ
Nitrobenzene can be prepared from benzene by using a mixture of conc. $HN{O_3}$ and conc. ${H_2}S{O_4}.$ In the nitrating mixture, $HN{O_3}$ acts as a
- ✓Base
- BAcid
- CReducing agent
- DCatalyst

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Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.