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Nitrobenzene is obtained from benzene by treating it with a mixed acid of concentrated HNO3 and concentrated H2SO4. In this nitration mixture, nitric acid functions as a/an:
- acid
- base
- catalyst
- reducing agent
Correct answer: base
Solution
In the nitrating mixture, conc. H2SO4 is the stronger acid and protonates HNO3; HNO3 thus acts as a base, accepting a proton before losing water to give the nitronium ion NO2+.
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