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ExamsJEE MainChemistry

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:

  1. acid
  2. base
  3. catalyst
  4. 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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