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JEE Main levelSingle correct optionDifficulty 2 of 3o2122

Heating nitrobenzene with concentrated and concentrated gives mainly

  1. A1,3,5-trinitrobenzene
  2. B1,3-dinitrobenzene
  3. C1,4-dinitrobenzene
  4. D1,2-dinitrobenzene

Answer: B

The group is a meta director. A second nitro group therefore enters at the meta position, giving 1,3-dinitrobenzene. Further nitration to the 1,3,5-trinitro compound needs much more drastic conditions.
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